US20100089746A1 - Hydragen-oxygen electrolyzing device and carbon paper electrodes thereof with material-changed outer surfaces - Google Patents
Hydragen-oxygen electrolyzing device and carbon paper electrodes thereof with material-changed outer surfaces Download PDFInfo
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- US20100089746A1 US20100089746A1 US12/572,246 US57224609A US2010089746A1 US 20100089746 A1 US20100089746 A1 US 20100089746A1 US 57224609 A US57224609 A US 57224609A US 2010089746 A1 US2010089746 A1 US 2010089746A1
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- hydrogen
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- oxygen
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- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 83
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- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 45
- 229910052751 metal Inorganic materials 0.000 claims abstract description 103
- 239000002184 metal Substances 0.000 claims abstract description 103
- 239000004020 conductor Substances 0.000 claims abstract description 68
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 38
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000001257 hydrogen Substances 0.000 claims abstract description 36
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 36
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- 239000003792 electrolyte Substances 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 21
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
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- 230000002708 enhancing effect Effects 0.000 claims description 6
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- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
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- 229910052703 rhodium Inorganic materials 0.000 claims description 3
- 239000010948 rhodium Substances 0.000 claims description 3
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 3
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims 4
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- 239000010410 layer Substances 0.000 description 37
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- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- KWSLGOVYXMQPPX-UHFFFAOYSA-N 5-[3-(trifluoromethyl)phenyl]-2h-tetrazole Chemical compound FC(F)(F)C1=CC=CC(C2=NNN=N2)=C1 KWSLGOVYXMQPPX-UHFFFAOYSA-N 0.000 description 1
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- CICKVIRTJQTMFM-UHFFFAOYSA-N sulfuric acid;tin Chemical compound [Sn].OS(O)(=O)=O CICKVIRTJQTMFM-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/70—Assemblies comprising two or more cells
- C25B9/73—Assemblies comprising two or more cells of the filter-press type
- C25B9/75—Assemblies comprising two or more cells of the filter-press type having bipolar electrodes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/02—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form
- C25B11/036—Bipolar electrodes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
- C25B11/042—Electrodes formed of a single material
- C25B11/043—Carbon, e.g. diamond or graphene
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
- C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
- C25B11/073—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/70—Assemblies comprising two or more cells
- C25B9/73—Assemblies comprising two or more cells of the filter-press type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/023—Porous and characterised by the material
- H01M8/0234—Carbonaceous material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Definitions
- the present invention is related to a hydrogen-oxygen electrolyzing device and particularly to a hydrogen-oxygen electrolyzing device and carbon paper electrodes each thereof with material changed outer surfaces.
- the District of Energy (DOE) of United States has changed the regulation regarding the electrolyzing efficiency of the water being electrolyzed as the hydrogen and the oxygen from current 45% to 75%, and the change will be in effect since 2010.
- the ways to produce the hydrogen and the oxygen are versatile, but it is most environmentally protective and energy-conservative with electrolyzing. Therefore, it is an extremely important goal to cooperate with the resource of renewable energy such as the wind power plant and the solar power plant to covert the water to the hydrogen and the oxygen as the storage energy effectively.
- the electrolyzing structure in the currently known hydrogen and oxygen generating apparatus mostly provides a plurality of electrodes, which are arranged as serial cells, and the outermost electrodes are subjected to the DC voltage, which is distributed as an individual divided voltage between two neighboring electrodes evenly.
- Taiwan Utility Model No. M302490 entitled “HYDROGEN-OXYGEN APPARATUS IN A POWER DEVICE WITH MIXING FUELS”.
- the ideal electrode provide a large contact area with the water molecules, and excellent hydrophilicity and gas expelling capability for enabling the water molecules falling onto the electrode with a state of closed circuit so as to perform the electrolysis; the produced hydrogen and oxygen are capable of escaping from the surface of the electrode rapidly instead of accumulation of gas films so as to avoid the adhesions of further water molecules being impeded. If the gas films stagnantly aggregate on the surfaces of the electrode to increase the resistance of electrolyzing, the exerted external voltage has to be increased to force the current passing through the resistance layer, and it results in decreasing the electrolyzing efficiency.
- the ideal value of the thermal equilibrium electrical potential energy E ideal is equal to 1.48V;
- the stainless steel is employed as the electrode with the electrolyte being the sodium hydroxide solution/the potassium hydroxide solution;
- the measured real electrolyzing divided voltage E real is 5.3V and the electrolyzing efficiency is 27.92%, which is 1.48V divided by 5.3V;
- the crux of the present invention is to improve the conventional hydrogen-oxygen electrolyzing device and the electrodes thereof for enhancing the electrolyzing efficiency.
- the primary object of the present invention is to provide a hydrogen-oxygen electrolyzing device with the carbon paper electrodes thereof having two material changed outer surfaces respectively in which the carbon paper substrates are utilized as the electrodes due to having good properties such as the electrical conductivity, thermal conductivity, the porosity, the permeability, the hydrophicity and the hydrophobility such that the surface contacts between the water molecules and the electrodes are maximized to prevent the accumulation of the produced gases and to even the currents of the electrodes for enhancing the electrolyzing efficiency.
- Another object of the present invention is to provide a hydrogen-oxygen electrolyzing device with the carbon paper electrodes thereof having two material changed outer surfaces respectively in which a pulse-width-module power supplier is utilized to stimulate the water molecules in the electrolyte with demodulation for the water molecules occurring the resonant electrolysis in the process of electrolyzing and enhancing the electrolyzing efficiency.
- a further object of the present invention is to provides a hydrogen-oxygen electrolyzing device with which the supplementary electrolyte can be added automatically with the flames being prohibited to move along with the mixture of hydrogen and oxygen and ignite the mixture of hydrogen and oxygen in the receiving trough, and the operation of the electrolysis can be stopped producing the mixture of hydrogen and oxygen automatically at the time of the pressure of the mixture of hydrogen and oxygen exceeding the preset pressure.
- a hydrogen-oxygen electrolyzing device for producing the hydrogen and the oxygen with the electrolyte according to the present invention comprises:
- a first container providing a receiving trough for containing the electrolytic solution
- electrolyzing structure further comprises:
- At least a series component being disposed in the receiving trough and further comprising a plurality of electrodes with a gap between every two neighboring electrodes;
- first conductor and the second conductor electrically connect with the two outermost electrodes
- each electrode is a carbon paper electrode with material changed outer surfaces, and further comprises:
- a carbon paper substrate having a first surface and a second surface
- a carbon paper electrode with two material changed outer surface for a hydrogen-oxygen electrolyzing device to produce the hydrogen and the oxygen with the electrolyte according to the present invention comprises:
- a carbon paper substrate having a first surface and a second surface
- FIG. 1 is a plan view of the first preferred embodiment of a hydrogen-oxygen electrolyzing device according to the present invention
- FIG. 2 perspective view of the first preferred embodiment of hydrogen-oxygen electrolyzing device according to the present invention
- FIG. 3 is a perspective view illustrating the first embodiment of the electrolyzing structure according to the invention.
- FIG. 4 is a fragmentary sectional view of the respective electrode in the electrolyzing structure shown in FIG. 3 ;
- FIG. 5 is a perspective view illustrating the electrode before being set up
- FIG. 6 is an exploded perspective view of the electrolyzing structure shown in FIG. 3 ;
- FIG. 7 is a perspective view illustrating the second embodiment of the electrolyzing structure according to the invention.
- FIG. 8 is a perspective view illustrating the third embodiment of the electrolyzing structure according to the invention.
- FIG. 9 is a circuit diagram illustrating the arrangement of the second preferred embodiment of a hydrogen-oxygen electrolyzing device according to the present invention.
- the hydrogen-oxygen electrolyzing device 1 of the first embodiment according to the present invention includes an electrolyzing structure 2 , a first container 41 , a second container 42 , a controller 43 , a level sensor 44 , a pump 45 , a gas pressure sensor 46 , a second level sensor 47 , an anti back fire valve 48 and a DC power supply 49 .
- the electrical connections are prior art and the pump 45 can be a membrane pump.
- the first embodiment of the electrolyzing structure 2 includes a serial cell 3 , a first conductor 21 and a second conductor 22 .
- the serial cell 3 further includes a plurality of electrodes 20 , a first frame 31 , a second frame 32 , a plurality of metal sheets 33 , a plurality of insulating sheets 34 , a plurality of insulating rods 35 , a plurality of insulating pads 36 , a plurality of insulating bolts 37 and a plurality of insulating nuts 38 .
- each of the electrodes 20 is a carbon paper electrode with the surfaces of two sides thereof being enhanced in property respectively and provides a carbon paper substrate 23 , which is the electrode substrate.
- the carbon paper substrate 23 is treated with electroless metal plating to activate and sensitize the surfaces in which the first surface 231 is disposed corresponding to the first metal layer 24 and the second surface 232 is disposed corresponding to the second metal layer 25 such that the first surface 231 is capable of being joined to the first metal layer 24 and the second surface 232 is capable of being joined to the second metal layer 25 .
- the first metal layer 24 has a first inner metal layer 241 and a first outer metal layer 242 ;
- the second metal layer 25 has a second inner layer 251 and a second outer layer 252 .
- the first inner metal layer 241 is disposed between the first surface 231 and the first outer metal layer 242 ; the second inner metal layer 251 is disposed between the second surface 232 and the second outer metal layer 252 .
- the respective electrode 20 has a plurality of holes 201 and each hole 201 at the same position in the respective electrode is corresponding to each other.
- the insulation rods 35 pierce the holes 201 respectively; the head part 351 of the respective insulation rod 35 press against one of the two outermost electrodes 20 and the end part of the respective insulation rod 35 passes through the another one of the outermost electrodes 20 to engage with one of the insulation pads 36 .
- one of insulation pads is disposed between two corresponding holes 201 , 201 of every two neighboring electrodes the respective insulation rod 35 for each insulation rod 35 engages with the insulation pads 36 while passing through the electrodes 20 such that a constant gap can be secure between every two neighboring electrodes 20 .
- the first frame 31 , the second frame 32 , the metal sheets 33 , the metal insulation sheets 34 are provided with corresponding holes 311 , 321 , 331 , 341 ;
- the bolts 37 pass through the holes 311 , 321 , 331 , 341 with the screw end of the respective bolt 37 engaging with one of the insulation nuts 38 for the metal sheets 33 and the insulation sheets 34 being clamped between the first frame 31 and the second frame 32 ; at least one of the insulation sheets 34 is disposed between the two outermost metal sheets 33 .
- There are six insulation sheets 34 are disposed between the two metal sheets 33 in the present embodiment.
- the first frame 31 and the second frame 32 each have two longitudinal grooves 312 , 322 being opposite to each other.
- the grooves 312 , 322 accommodate the first conductor 21 and the second conductor 22 respectively;
- the first conductor 21 contacts with the metal sheet 33 next to the first frame 31 ;
- the second conductor 22 contacts the metal sheet 33 next to the second frame 32 .
- An end of the respective metal sheet 33 contacts with the outer lateral side of the two outermost electrodes 20 ;
- an end of the respective insulation sheet 34 is disposed between every two consecutive electrodes 20 to allow the edges of the outermost electrodes 20 are clamped between the neighboring metal sheets 33 and the insulation sheets 34 ; the edges of the other electrodes 20 are clamped between the neighboring insulation sheets 34 . In this way, the electrodes 20 are clamped in a way of being parallel to each other.
- the first container 41 includes a first main body 411 and a first covering lid 412 ; the first main body 411 has a first receiving trough 413 , a first liquid inlet 414 ; the first liquid inlet 414 is disposed at the bottom of the main body 411 ; the first liquid inlet 414 communicates with the first receiving trough 413 ; the first covering lid 412 is joined to the first main body in an airtight state such that an airtight space is formed in the first receiving trough 413 ; the first covering lid 412 has a first air outlet 415 and a second liquid inlet 416 ; the second liquid inlet 416 is sealed with a sealing member 417 normally; the sealing member 417 can be removed for the supplementary liquid being capable of being added into the first receiving trough 413 .
- the first main body 411 provides a first level sensor 44 ; the first level sensor 44 includes a high level sensing unit 441 and a low level sensing unit 442 for detecting the electrolyte 51 in the first receiving trough 413 .
- the series component 3 of the electrolyzing structure 2 is disposed in the first receiving trough 413 , but the first conductor 21 and the second conductor 22 pass through the first covering lid 412 with the upper ends of the conductors 21 , 22 extending beyond the top of the covering lid 412 to connect with the positive pole and the negative pole of the DC supply 49 respectively.
- the second container 42 includes a second main body 421 and a second covering lid 422 ;
- the second main body 421 has a second receiving trough 423 , a first liquid outlet 424 ;
- the first liquid outlet 424 communicates with the second receiving trough 423 ;
- the second covering lid 422 is joined to the second main body 421 in an airtight state such that an airtight space is formed in the second receiving trough 423 ;
- the second covering lid 422 provides a gas intake port 425 , a second discharge port 426 and at least a third liquid inlet 427 ;
- the third liquid inlet 427 is sealed with a second sealing member 428 normally, and the second sealing member 428 can be removed for the supplementary liquid being added into the second receiving trough 423 via the third liquid inlet 427 ;
- the second covering lid 422 connects with an internal pipe 429 ;
- the internal pipe 429 is disposed in the second receiving trough 423 to communicate with the gas intake port
- the second main body 421 provides a second level sensor 47 for sensing the height of the level of the supplementary liquid.
- the lower end of the internal pipe 429 is disposed at an elevation lower than the second level sensor 47 .
- a first external pipe 61 is disposed with two ends thereof being joined to the first main body 411 and the pump 45 respectively for communicating with the first liquid inlet 414 and the output port of the pump 45 .
- the second covering lid 422 is attached with a gas pressure sensor 46 for detecting the gas pressure in the second receiving trough 423 .
- a second external pipe 62 is connected to the pump 45 and the second main body 421 with two ends thereof respectively for communicating with the entrance of the pump 45 and the first liquid outlet 424 .
- a third external pipe 63 is connected to the first covering lid 412 and the second covering lid 422 with two ends thereof respectively for communicating with the first gas outlet 415 and the gas intake port 425 .
- a fourth external pipe 64 is disposed to connect with the second covering lid 422 and the anti backfire valve 48 with two ends thereof respectively for communicating with the second discharge port 426 and the entrance of the anti backfire valve 48 .
- a fifth pipe 65 is disposed with an end thereof connecting with the exit of the anti backfire valve 48 .
- the electrodes 20 of the electrolyzing structure 2 treat the electrolyte 51 with electrolysis to generate the hydrogen and the oxygen; the mixture of hydrogen and oxygen flows outward the first receiving trough 413 via the first gas outlet 415 and is guided into the supplementary liquid 52 via the third external pipe 63 , the gas intake port 425 and the internal pipe 429 successively; further, the mixture of hydrogen and oxygen rises to the second receiving trough 423 above the supplementary liquid 52 , and flows outward from the fifth external pipe 65 after passing through the second discharge port 426 , the fourth external pipe 64 , the anti backfire valve 48 and the fifth pipe 65 .
- the controller 43 emits a control signal to stop or start the pump 45 as soon as a sensing signal sent out from the first level sensor 44 corresponding to the high liquid level or the low liquid level is detected by the controller 43 such that the pump 45 stops or force the supplementary liquid 52 to enter the first receiving trough 413 automatically for maintaining the liquid level of the electrolyte 51 within a preset range.
- a sensing signal is emitted by the second level sensor 47 ; when the sensing signal is received by the controller 43 , a control signal is sent out by the controller to a alarm such that a sound signal with light on is emitted from the alarm to remind the user to open the second sealing member 428 and supply the supplementary liquid 52 into the second receiving trough 423 via the third liquid inlet 427 .
- the flames outside the fifth external pipe 65 are incapable of igniting the mixture of hydrogen and oxygen in the first receiving trough 413 along the moving path of mixture of the hydrogen and the oxygen.
- the controller 43 is capable of detecting a sensing signal emitted by the gas pressure sensor and issues a control signal to the DC power supplier 49 ; under this circumference, the DC power supplier 49 stops outputting the voltage to the first conductor 21 and the second conductor 22 , and the electrolysis of the electrodes 20 of the electrolyzing structure to the electrolyte 51 is disabled to avoid the generation of the mixture of hydrogen and oxygen.
- the carbon paper substrate 23 employed in the present invention was used as the core material of the hydrogen fuel cell assembly originally and it is called the gas diffusion layer (GDL);
- the carbon paper substrate 23 generally is a porous material made of stacked carbon fibers such as the carbon paper or carbon cloth, and it acts as a gas diffusion material (GDM).
- GDM gas diffusion material
- the micro porous layer (MPL) at the outer sides of the carbon paper substrate mainly consists of the carbon powder with high conductivity and further includes the dispersion agent, solvent and hydrophilic/hydrophobic agent.
- the method for making the MPL including the following steps: the preceding components being mixed and agitated with a supersonic oscillator to form the liquid ink, the liquid ink being coated on the surface of the gas diffusion layer with the coating technology such as spraying, scraping or net printing; and being high-temperature sintered.
- the GDL and the MPL play extremely important roles and functions in the hydrogen fuel cell assembly such as (1) offering the permeating passages for the reacting gases (the hydrogen and the oxygen); (2) offering the passages for the products of the reaction (the water and the heat) leaving the MPL; (3) offering the entering and leaving passages for the electrons of the electrochemical reaction; (4) acting as the catalyst of the MPL and the structural support of the proton exchange membrane.
- the GDL and the MPL have to provide with good conductivity, catalyzing, heat transmission, porosity, permeability and hydrophilicity.
- the first metal layer 24 and the second metal layer 25 are formed with a plurality of micro metal particles being coated the first surface 231 and the second surface 232 of the carbon paper substrate 23 .
- the first surface 231 and the second surface 232 provide the same function as the MPL in the hydrogen fuel cell assembly to perform the catalytic conversion with the water by means of extremely large contact surface.
- the function of the catalyst is for accelerating the conversion efficiency of the positive and negative ions such that the contact area of the catalyst with the water is an extremely significant factor.
- the process of electroless metal is utilized in the following steps: the carbon paper substrate 23 being cleaned and degreased with the acetone under the supersonic wave; being dipped in the tin sulfuric acid for sensitization, being activated in the palladium salt solution; the metal being reduced in the acid solution of the sodium hypophosphite to adhere to the first surface 231 and the second surface 232 of the carbon paper substrate 23 .
- the growing thickness of the respective metal layer can be controlled with the plating parameter.
- the growth speed of the ordinary electroless metal film can be controlled at 1 ⁇ m/min to form both the first inner metal layer 241 and the second inner metal layer 251 with high density and both the first outer metal layer 242 and the second outer metal layer 252 with low density.
- the first and second inner metal layers 241 , 242 in high density are employed to increase the adhesive forces of the first and second metal layers 24 , 25 while being attached to the first and second surfaces 231 , 232 of the carbon paper substrate 23 .
- the temperature and the concentration are controlled accurately such that it is capable of wrapping and forming the micro metal particles on the first and second surfaces 231 , 232 of the carbon paper substrate 23 .
- the micro metal particles are sugarcoated-haws-shaped. Because the micro metal particles have a micro diameter about 15 ⁇ 30 ⁇ m respectively, the outer surfaces thereof have fine sharp projections for reinforcing the reaction of catalytic conversion.
- the water molecules are bonded with covalence and the bonding energy of the covalent bond is pretty high; the polarization can be utilized to urge the scattered water molecules to be lined up in the pulse electric field; the demodulation is utilized to allow the dissociation energies of the water molecules being capable of breaking the covalence while the polarization frequencies of the water molecules are in a state of corresponding to the modulation frequency. It is a phenomenon reaching the resonant stage and it greatly enhances the electrolyzing efficiency.
- the DC power supplier 49 can be provided with the function of the pulse width modulation (PWM) to supply the pulse type DC power to the electrodes 20 .
- PWM pulse width modulation
- the demodulation is utilized to control the supplied power and to reach the resonant frequency (600 Hz ⁇ 45 KHz).
- a plurality of flat shape piezoelectric material sheets 39 are placed at the gaps between the parallel electrodes 20 .
- the piezoelectric material sheets such as the quartz sheets or the ceramic piezoelectric sheets are capable of forcing the mixing gas being generated from electrolyzed water molecules and moving away the electrodes 20 rapidly for promoting the capability of expelling the mixture gas and enhancing the effect of the electrolysis with the function of the oscillation.
- the electrodes in the present invention are structurally arranged as serial cells such that the gross voltage supplied at the outermost electrodes is divided as division voltages between every two neighboring serial cells.
- FIGS. 1 and 5 illustrate that when the concentration of the electrolyte 51 is controlled at PH value being 12, the controlled current density is 1 Amp/cm 2 .
- the electrodes 20 each have an area 25 cm 2 such that the current value shown on the DC power supplier 49 is 25 Amp with the voltage value 11.5 Volts.
- the production rate for the mixture gas is 94.7 liter/hr.
- FIGS. 1 and 4 show that the carbon paper substrate 23 with ultrahigh surface contact and the micro metal particles coated on the carbon paper substrate 23 with extremely high catalytic reaction electrolyzes the water molecules to produce the hydrogen and the oxygen; alternatively, the pulse-width-module power supplier 49 is utilized to stimulate the water molecules between the electrodes 20 with demodulation for the water molecules constituting the resonant electrolysis in the process of the electrolyzing such that the high electrolyzing efficiency being over 90% can be reached advantageously.
- a electrolyzing structure 7 in the third embodiment includes a plurality of serial cells 71 , 72 , 73 , a first conductor 74 , a second conductor 75 and a plurality of “U”-shaped third conductors 76 .
- the serial cells 71 , 72 , 73 provide a structure of serial elongation in which the two serial cells 71 , 72 are disposed at the two outermost sides of the electrolyzing structure 7 .
- the structures of the serial cells 71 , 72 , 73 are the same as the electrode serial cell 3 shown in FIG. 3 .
- the serial cells 71 , 72 , 73 each have a first frame 711 , 721 , 731 and a second frame 712 , 722 , 732 respectively; the first frames 711 , 721 , 731 have a first groove 713 , 723 , 733 respectively; the second frames 712 , 722 , 732 have a second groove 714 , 724 , 734 respectively;
- the serial cell 73 is disposed between the two serial cells 71 , 72 ; the first frame 731 and the second frame 732 press against the second frame 712 and the first frame 721 .
- the first groove 713 is joined to the first conductor 74 ; the second groove 724 is joined to the second conductor 75 ; the third conductor 76 is joined to the second groove 714 and the first groove 733 ; Further, the third conductor 76 is joined to the second groove 734 , the first groove 723 ; therefore, the serial cells 71 , 72 , 73 electrically connect with each other sequentially.
- the serial cells 71 , 72 , 73 perform the electrolysis to the electrolyte.
- an electrolyzing structure provided in the fourth embodiment according to the present invention includes a plurality of serial cells 81 , 82 , 83 , a first conductor 84 and a second conductor 85 .
- the serial cells 81 , 82 , 83 constitute a structure of parallel extension with the two serial cells 81 , 82 are disposed at the two outermost sides laterally.
- the serial cells 81 , 82 , 83 each have a first frame 811 , 821 , 831 and a second frame 812 , 822 , 832 , respectively; a plurality of metal sheets 813 and a plurality of insulation sheets 824 are disposed between the two lateral sides of both the first frame 811 and the second frame 812 respectively.
- the groove 815 of the first frame 811 is joined to the first conductor 84 ; the groove 825 of the second frame 822 is joined to the second conductor 85 .
- the structural arrangement for the serial cells 81 , 82 , 83 is the same as the serial cell 3 shown in FIG. 3 , but the two first frames 811 , 831 contact with the same metal sheets 813 , and the two second frames 812 , 832 contact the same metal sheets 813 too; the two second frames 822 , 832 contact with the same metal sheets 823 , and the two second frames 822 , 832 contact the same metal sheets 823 ; therefore, the serial cells 81 , 82 , 83 at the ends of the first frames 811 , 821 , 831 electrically connect with each other sequentially with the same potential, and at the ends of the second frames 812 , 822 , 832 electrically connect with each other sequentially with the same potential too such that the areas of the electrodes are expanded.
- the serial cells 81 , 82 , 83 are capable of performing the electrolysis to the electrolyte at the same time.
- a hydrogen-oxygen electrolyzing device 9 provided in the second embodiment according to the present invention includes an AC frequency-changeable driver 90 , three electrolyzing structures 95 , 96 , 97 , a first container 98 , a second container 42 (shown in FIGS. 1 and 2 , and shown in FIG. 9 ), a controller 43 , a first level sensor 44 , a pump 45 , a gas pressure sensor 46 , a second level sensor 47 and an anti backfire valve 48 .
- the hydrogen-oxygen electrolyzing device 9 is coupled to the three-phase power (the utility power) such that the AC frequency-changeable driver 90 and the three electrolyzing structures 95 , 96 , 97 are required.
- the hydrogen-oxygen electrolyzing device 9 shown in FIG. 9 almost the same as the DC hydrogen-oxygen electrolyzing device 1 shown in FIGS. 1 and 2 ; the only differences are the DC power supplier 49 and an electrolyzing structure 2 provided by the hydrogen-oxygen electrolyzing device 1 .
- the three electrolyzing structures 95 , 96 , 97 can be the electrolyzing structures 2 , 7 , 8 shown in FIGS. 6 , 7 and 8 respectively.
- the AC frequency-changeable driver 90 can be the conventional AC motor driver with changeable frequency and includes a three-phase full wave rectifier 91 , an inductor 92 , a capacitor 93 and six insulated gate bipolar transistors (IGBT).
- a three-phase power is input to the three-phase full wave rectifier 91 for being rectified with the three-phase full wave rectifier 91 , a DC voltage is output to both the inductor 92 and the capacitor 93 from the three-phase full wave rectifier 91 , and a DC voltage approximately without ripples is obtained before passing through the six IGBT 94 .
- the current with three positive output ends U(+), V(+) and W(+) is output under six control procedures of the six IGBT circularly.
- the three positive output ends U(+), V(+) and W(+) of the AC frequency-changeable driver 90 are coupled to the first conductors 951 , 961 , 971 of the three electrolyzing structures 95 , 96 , 97 respectively; the negative end of the AC frequency-changeable driver 90 is coupled to the second conductors 952 , 962 , 972 respectively; the three electrolyzing structures 95 , 96 , 97 are disposed as “Y”-shaped arrangement; the first container 98 contains the three electrolyzing structures 95 , 96 , 97 , but the first conductors 951 , 961 , 971 and the second conductors 952 , 962 , 972 extend outward the first container 98 .
- the three positive output ends U(+), V(+) and W(+) of the AC frequency-changeable driver 90 controls the DC power supply to the first conductors 951 , 961 , 971 of the three electrolyzing structures 95 , 96 , 97 alternately such that the electrolyte 51 in the first container 98 is capable of being electrolyzed and produces the hydrogen and the oxygen.
- the AC frequency changeable driver 90 in the second embodiment according to the present invention accomplishes the following achievements:
- the carbon paper substrate with good properties such as electrical conductivity, thermal conductivity, porosity, permeability, hydrophicity and hydrophobility is employed to increase the maximum surface contact between the water molecules and the electrodes, the catalyst and the gas expelling capability, to prevent accumulation of the produced hydrogen and oxygen and to even the currents of the electrodes.
- the outer surfaces of the carbon paper substrate are coated with the metal or the metal compound with the electroless plating, the sputtering, the physical vapor deposition (PVD), the chemical vapor deposition (CVD) or the micro/nano powder sintering such that the two opposite catalyst layers are formed on the fiber surface for changing the material of the surface of the carbon paper substrate.
- PVD physical vapor deposition
- CVD chemical vapor deposition
- micro/nano powder sintering such that the two opposite catalyst layers are formed on the fiber surface for changing the material of the surface of the carbon paper substrate.
- the two material changed layers (the first metal layer and the second metal layer) on the surface of the carbon paper substrate each can be a single layer or double layers, and gradient of the respective material change layer can be platinum, rhodium, cobalt, iron and palladium or the compounds thereof.
- the pulse-width-module power supplier stimulates the water molecules between the electrodes with demodulation for the water molecules forming the resonant electrolysis in the process of electrolyzing so as to enhance the electrolyzing efficiency.
- the piezoelectric material sheet such as the quartz slice or the ceramic piezoelectric sheet is disposed in the gap between every two electrodes for disturbing the electrolyte evenly and reinforcing the fluidity of the produced gases for enhancing effectiveness of the electrolysis greatly.
- the electrolyte used in the present invention can be the alkaline solution such as the sodium hydroxide solution or the potassium hydroxide solution with a molar concentration in a range of 0.001M ⁇ 0.1M.
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Abstract
Description
- 1. Field of the Invention
- The present invention is related to a hydrogen-oxygen electrolyzing device and particularly to a hydrogen-oxygen electrolyzing device and carbon paper electrodes each thereof with material changed outer surfaces.
- 2. Brief Description of Related Art
- The District of Energy (DOE) of United States has changed the regulation regarding the electrolyzing efficiency of the water being electrolyzed as the hydrogen and the oxygen from current 45% to 75%, and the change will be in effect since 2010. The ways to produce the hydrogen and the oxygen are versatile, but it is most environmentally protective and energy-conservative with electrolyzing. Therefore, it is an extremely important goal to cooperate with the resource of renewable energy such as the wind power plant and the solar power plant to covert the water to the hydrogen and the oxygen as the storage energy effectively.
- The electrolyzing structure in the currently known hydrogen and oxygen generating apparatus mostly provides a plurality of electrodes, which are arranged as serial cells, and the outermost electrodes are subjected to the DC voltage, which is distributed as an individual divided voltage between two neighboring electrodes evenly. The preceding art was disclosed with Taiwan Utility Model No. M302490 entitled “HYDROGEN-OXYGEN APPARATUS IN A POWER DEVICE WITH MIXING FUELS”.
- It is noted that how the water molecules contacting with the electrodes affects the electrolyzing efficiency significantly in the process of electrolysis. The ideal electrode provide a large contact area with the water molecules, and excellent hydrophilicity and gas expelling capability for enabling the water molecules falling onto the electrode with a state of closed circuit so as to perform the electrolysis; the produced hydrogen and oxygen are capable of escaping from the surface of the electrode rapidly instead of accumulation of gas films so as to avoid the adhesions of further water molecules being impeded. If the gas films stagnantly aggregate on the surfaces of the electrode to increase the resistance of electrolyzing, the exerted external voltage has to be increased to force the current passing through the resistance layer, and it results in decreasing the electrolyzing efficiency. For instance, under a temperature condition of 25° C., the ideal value of the thermal equilibrium electrical potential energy Eideal is equal to 1.48V; Taking the conventional hydrogen-oxygen electrolyzing device as an example, the stainless steel is employed as the electrode with the electrolyte being the sodium hydroxide solution/the potassium hydroxide solution; the measured real electrolyzing divided voltage Ereal is 5.3V and the electrolyzing efficiency is 27.92%, which is 1.48V divided by 5.3V; Ereal=5.3V is higher than the ideal potential Eideal=1.48V and the remainder voltage converts to the redundant heat such that the temperature of the electrolyte is increased due to being heated with the redundant heat. Hence, it becomes necessary for proper dissipation of the heat to prevent the mixture of the hydrogen and the oxygen from exploding in case of the mixture of the hydrogen and the oxygen reaching the flash point.
- The crux of the present invention is to improve the conventional hydrogen-oxygen electrolyzing device and the electrodes thereof for enhancing the electrolyzing efficiency.
- The primary object of the present invention is to provide a hydrogen-oxygen electrolyzing device with the carbon paper electrodes thereof having two material changed outer surfaces respectively in which the carbon paper substrates are utilized as the electrodes due to having good properties such as the electrical conductivity, thermal conductivity, the porosity, the permeability, the hydrophicity and the hydrophobility such that the surface contacts between the water molecules and the electrodes are maximized to prevent the accumulation of the produced gases and to even the currents of the electrodes for enhancing the electrolyzing efficiency.
- Another object of the present invention is to provide a hydrogen-oxygen electrolyzing device with the carbon paper electrodes thereof having two material changed outer surfaces respectively in which a pulse-width-module power supplier is utilized to stimulate the water molecules in the electrolyte with demodulation for the water molecules occurring the resonant electrolysis in the process of electrolyzing and enhancing the electrolyzing efficiency.
- A further object of the present invention is to provides a hydrogen-oxygen electrolyzing device with which the supplementary electrolyte can be added automatically with the flames being prohibited to move along with the mixture of hydrogen and oxygen and ignite the mixture of hydrogen and oxygen in the receiving trough, and the operation of the electrolysis can be stopped producing the mixture of hydrogen and oxygen automatically at the time of the pressure of the mixture of hydrogen and oxygen exceeding the preset pressure.
- Accordingly, a hydrogen-oxygen electrolyzing device for producing the hydrogen and the oxygen with the electrolyte according to the present invention comprises:
- a first container providing a receiving trough for containing the electrolytic solution; and
- at least an electrolyzing structure;
- wherein the electrolyzing structure further comprises:
- at least a series component being disposed in the receiving trough and further comprising a plurality of electrodes with a gap between every two neighboring electrodes;
- a first conductor; and
- a second conductor;
- wherein the first conductor and the second conductor electrically connect with the two outermost electrodes;
- characterized in that each electrode is a carbon paper electrode with material changed outer surfaces, and further comprises:
- a carbon paper substrate having a first surface and a second surface;
- a first metal layer being joined to the first surface; and
- a second metal layer being joined to the second surface.
- Further, a carbon paper electrode with two material changed outer surface for a hydrogen-oxygen electrolyzing device to produce the hydrogen and the oxygen with the electrolyte according to the present invention comprises:
- a carbon paper substrate having a first surface and a second surface;
- a first metal layer being joined to the first surface; and
- a second metal layer being joined to the second surface.
- The present invention can be more fully understood by reference to the following description and accompanying drawings, in which:
-
FIG. 1 is a plan view of the first preferred embodiment of a hydrogen-oxygen electrolyzing device according to the present invention; -
FIG. 2 perspective view of the first preferred embodiment of hydrogen-oxygen electrolyzing device according to the present invention; -
FIG. 3 is a perspective view illustrating the first embodiment of the electrolyzing structure according to the invention; -
FIG. 4 is a fragmentary sectional view of the respective electrode in the electrolyzing structure shown inFIG. 3 ; -
FIG. 5 is a perspective view illustrating the electrode before being set up; -
FIG. 6 is an exploded perspective view of the electrolyzing structure shown inFIG. 3 ; -
FIG. 7 is a perspective view illustrating the second embodiment of the electrolyzing structure according to the invention; -
FIG. 8 is a perspective view illustrating the third embodiment of the electrolyzing structure according to the invention; and -
FIG. 9 is a circuit diagram illustrating the arrangement of the second preferred embodiment of a hydrogen-oxygen electrolyzing device according to the present invention. - Referring to
FIGS. 1 and 2 , the hydrogen-oxygen electrolyzing device 1 of the first embodiment according to the present invention includes anelectrolyzing structure 2, afirst container 41, asecond container 42, acontroller 43, alevel sensor 44, apump 45, agas pressure sensor 46, asecond level sensor 47, an antiback fire valve 48 and aDC power supply 49. The electrical connections are prior art and thepump 45 can be a membrane pump. - Referring to
FIG. 3 , the first embodiment of theelectrolyzing structure 2 includes aserial cell 3, afirst conductor 21 and asecond conductor 22. Theserial cell 3 further includes a plurality ofelectrodes 20, afirst frame 31, asecond frame 32, a plurality ofmetal sheets 33, a plurality ofinsulating sheets 34, a plurality ofinsulating rods 35, a plurality ofinsulating pads 36, a plurality ofinsulating bolts 37 and a plurality ofinsulating nuts 38. - Referring to
FIG. 4 , each of theelectrodes 20 is a carbon paper electrode with the surfaces of two sides thereof being enhanced in property respectively and provides acarbon paper substrate 23, which is the electrode substrate. Thecarbon paper substrate 23 is treated with electroless metal plating to activate and sensitize the surfaces in which thefirst surface 231 is disposed corresponding to thefirst metal layer 24 and thesecond surface 232 is disposed corresponding to thesecond metal layer 25 such that thefirst surface 231 is capable of being joined to thefirst metal layer 24 and thesecond surface 232 is capable of being joined to thesecond metal layer 25. Further, thefirst metal layer 24 has a firstinner metal layer 241 and a firstouter metal layer 242; thesecond metal layer 25 has a secondinner layer 251 and a secondouter layer 252. The firstinner metal layer 241 is disposed between thefirst surface 231 and the firstouter metal layer 242; the secondinner metal layer 251 is disposed between thesecond surface 232 and the secondouter metal layer 252. Therespective electrode 20 has a plurality ofholes 201 and eachhole 201 at the same position in the respective electrode is corresponding to each other. - Referring to
FIG. 5 , theinsulation rods 35 pierce theholes 201 respectively; thehead part 351 of therespective insulation rod 35 press against one of the twooutermost electrodes 20 and the end part of therespective insulation rod 35 passes through the another one of theoutermost electrodes 20 to engage with one of theinsulation pads 36. Further, one of insulation pads is disposed between twocorresponding holes respective insulation rod 35 for eachinsulation rod 35 engages with theinsulation pads 36 while passing through theelectrodes 20 such that a constant gap can be secure between every two neighboringelectrodes 20. - Referring to
FIG. 6 , thefirst frame 31, thesecond frame 32, themetal sheets 33, themetal insulation sheets 34 are provided withcorresponding holes bolts 37 pass through theholes respective bolt 37 engaging with one of theinsulation nuts 38 for themetal sheets 33 and theinsulation sheets 34 being clamped between thefirst frame 31 and thesecond frame 32; at least one of theinsulation sheets 34 is disposed between the twooutermost metal sheets 33. There are sixinsulation sheets 34 are disposed between the twometal sheets 33 in the present embodiment. Thefirst frame 31 and thesecond frame 32 each have twolongitudinal grooves grooves first conductor 21 and thesecond conductor 22 respectively; Thefirst conductor 21 contacts with themetal sheet 33 next to thefirst frame 31; thesecond conductor 22 contacts themetal sheet 33 next to thesecond frame 32. An end of therespective metal sheet 33 contacts with the outer lateral side of the twooutermost electrodes 20; an end of therespective insulation sheet 34 is disposed between every twoconsecutive electrodes 20 to allow the edges of theoutermost electrodes 20 are clamped between the neighboringmetal sheets 33 and theinsulation sheets 34; the edges of theother electrodes 20 are clamped between the neighboringinsulation sheets 34. In this way, theelectrodes 20 are clamped in a way of being parallel to each other. - Referring to
FIGS. 1 and 2 again, thefirst container 41 includes a firstmain body 411 and afirst covering lid 412; the firstmain body 411 has afirst receiving trough 413, a firstliquid inlet 414; the firstliquid inlet 414 is disposed at the bottom of themain body 411; the firstliquid inlet 414 communicates with thefirst receiving trough 413; thefirst covering lid 412 is joined to the first main body in an airtight state such that an airtight space is formed in thefirst receiving trough 413; thefirst covering lid 412 has afirst air outlet 415 and a secondliquid inlet 416; the secondliquid inlet 416 is sealed with a sealingmember 417 normally; the sealingmember 417 can be removed for the supplementary liquid being capable of being added into thefirst receiving trough 413. The firstmain body 411 provides afirst level sensor 44; thefirst level sensor 44 includes a highlevel sensing unit 441 and a lowlevel sensing unit 442 for detecting theelectrolyte 51 in thefirst receiving trough 413. Theseries component 3 of the electrolyzingstructure 2 is disposed in thefirst receiving trough 413, but thefirst conductor 21 and thesecond conductor 22 pass through thefirst covering lid 412 with the upper ends of theconductors lid 412 to connect with the positive pole and the negative pole of theDC supply 49 respectively. - The
second container 42 includes a secondmain body 421 and asecond covering lid 422; the secondmain body 421 has asecond receiving trough 423, a firstliquid outlet 424; the firstliquid outlet 424 communicates with thesecond receiving trough 423; thesecond covering lid 422 is joined to the secondmain body 421 in an airtight state such that an airtight space is formed in thesecond receiving trough 423; thesecond covering lid 422 provides agas intake port 425, asecond discharge port 426 and at least a thirdliquid inlet 427; the thirdliquid inlet 427 is sealed with asecond sealing member 428 normally, and thesecond sealing member 428 can be removed for the supplementary liquid being added into thesecond receiving trough 423 via the thirdliquid inlet 427; thesecond covering lid 422 connects with aninternal pipe 429; theinternal pipe 429 is disposed in thesecond receiving trough 423 to communicate with thegas intake port 425. The secondmain body 421 provides asecond level sensor 47 for sensing the height of the level of the supplementary liquid. The lower end of theinternal pipe 429 is disposed at an elevation lower than thesecond level sensor 47. A firstexternal pipe 61 is disposed with two ends thereof being joined to the firstmain body 411 and thepump 45 respectively for communicating with the firstliquid inlet 414 and the output port of thepump 45. Thesecond covering lid 422 is attached with agas pressure sensor 46 for detecting the gas pressure in thesecond receiving trough 423. A secondexternal pipe 62 is connected to thepump 45 and the secondmain body 421 with two ends thereof respectively for communicating with the entrance of thepump 45 and the firstliquid outlet 424. A thirdexternal pipe 63 is connected to thefirst covering lid 412 and thesecond covering lid 422 with two ends thereof respectively for communicating with thefirst gas outlet 415 and thegas intake port 425. A fourthexternal pipe 64 is disposed to connect with thesecond covering lid 422 and the anti backfirevalve 48 with two ends thereof respectively for communicating with thesecond discharge port 426 and the entrance of the anti backfirevalve 48. Afifth pipe 65 is disposed with an end thereof connecting with the exit of the anti backfirevalve 48. - When the positive pole and the negative pole of the
DC power supplier 49 electrically connect with thefirst conductor 21 and thesecond conductor 22, theelectrodes 20 of the electrolyzingstructure 2 treat theelectrolyte 51 with electrolysis to generate the hydrogen and the oxygen; the mixture of hydrogen and oxygen flows outward thefirst receiving trough 413 via thefirst gas outlet 415 and is guided into thesupplementary liquid 52 via the thirdexternal pipe 63, thegas intake port 425 and theinternal pipe 429 successively; further, the mixture of hydrogen and oxygen rises to thesecond receiving trough 423 above thesupplementary liquid 52, and flows outward from the fifthexternal pipe 65 after passing through thesecond discharge port 426, the fourthexternal pipe 64, the anti backfirevalve 48 and thefifth pipe 65. Thecontroller 43 emits a control signal to stop or start thepump 45 as soon as a sensing signal sent out from thefirst level sensor 44 corresponding to the high liquid level or the low liquid level is detected by thecontroller 43 such that thepump 45 stops or force thesupplementary liquid 52 to enter thefirst receiving trough 413 automatically for maintaining the liquid level of theelectrolyte 51 within a preset range. - When the
second level sensor 47 detects that the level of the supplementary liquid is lower than the preset level, a sensing signal is emitted by thesecond level sensor 47; when the sensing signal is received by thecontroller 43, a control signal is sent out by the controller to a alarm such that a sound signal with light on is emitted from the alarm to remind the user to open thesecond sealing member 428 and supply thesupplementary liquid 52 into thesecond receiving trough 423 via the thirdliquid inlet 427. Meanwhile, the flames outside the fifthexternal pipe 65 are incapable of igniting the mixture of hydrogen and oxygen in thefirst receiving trough 413 along the moving path of mixture of the hydrogen and the oxygen. - In case of the gas pressure exceeding the preset value, the
controller 43 is capable of detecting a sensing signal emitted by the gas pressure sensor and issues a control signal to theDC power supplier 49; under this circumference, theDC power supplier 49 stops outputting the voltage to thefirst conductor 21 and thesecond conductor 22, and the electrolysis of theelectrodes 20 of the electrolyzing structure to theelectrolyte 51 is disabled to avoid the generation of the mixture of hydrogen and oxygen. - Referring to
FIG. 4 again, thecarbon paper substrate 23 employed in the present invention was used as the core material of the hydrogen fuel cell assembly originally and it is called the gas diffusion layer (GDL); thecarbon paper substrate 23 generally is a porous material made of stacked carbon fibers such as the carbon paper or carbon cloth, and it acts as a gas diffusion material (GDM). Because the carbon cloth and the carbon paper are porous with excellent conductivity and high porosity, it is favorable for the uniform permeating reactions of the hydrogen and the oxygen and the uniform adhesion of the produced water. The micro porous layer (MPL) at the outer sides of the carbon paper substrate mainly consists of the carbon powder with high conductivity and further includes the dispersion agent, solvent and hydrophilic/hydrophobic agent. The method for making the MPL including the following steps: the preceding components being mixed and agitated with a supersonic oscillator to form the liquid ink, the liquid ink being coated on the surface of the gas diffusion layer with the coating technology such as spraying, scraping or net printing; and being high-temperature sintered. - The GDL and the MPL play extremely important roles and functions in the hydrogen fuel cell assembly such as (1) offering the permeating passages for the reacting gases (the hydrogen and the oxygen); (2) offering the passages for the products of the reaction (the water and the heat) leaving the MPL; (3) offering the entering and leaving passages for the electrons of the electrochemical reaction; (4) acting as the catalyst of the MPL and the structural support of the proton exchange membrane. Hence, the GDL and the MPL have to provide with good conductivity, catalyzing, heat transmission, porosity, permeability and hydrophilicity.
- The reaction process of the hydrogen fuel cell assembly generating the electricity by means of the hydrogen being joined to the oxygen is contrary to that of the water being electrolyzed to generate the hydrogen and the oxygen. Nevertheless, the same requirements of good electrode designs are necessary for both of the reaction processes.
- Referring to
FIG. 4 again, thefirst metal layer 24 and thesecond metal layer 25 are formed with a plurality of micro metal particles being coated thefirst surface 231 and thesecond surface 232 of thecarbon paper substrate 23. Thefirst surface 231 and thesecond surface 232 provide the same function as the MPL in the hydrogen fuel cell assembly to perform the catalytic conversion with the water by means of extremely large contact surface. The function of the catalyst is for accelerating the conversion efficiency of the positive and negative ions such that the contact area of the catalyst with the water is an extremely significant factor. The process of electroless metal is utilized in the following steps: thecarbon paper substrate 23 being cleaned and degreased with the acetone under the supersonic wave; being dipped in the tin sulfuric acid for sensitization, being activated in the palladium salt solution; the metal being reduced in the acid solution of the sodium hypophosphite to adhere to thefirst surface 231 and thesecond surface 232 of thecarbon paper substrate 23. The growing thickness of the respective metal layer can be controlled with the plating parameter. The growth speed of the ordinary electroless metal film can be controlled at 1 μm/min to form both the firstinner metal layer 241 and the secondinner metal layer 251 with high density and both the firstouter metal layer 242 and the secondouter metal layer 252 with low density. The first and secondinner metal layers second surfaces carbon paper substrate 23. The temperature and the concentration are controlled accurately such that it is capable of wrapping and forming the micro metal particles on the first andsecond surfaces carbon paper substrate 23. The micro metal particles are sugarcoated-haws-shaped. Because the micro metal particles have a micro diameter about 15˜30 μm respectively, the outer surfaces thereof have fine sharp projections for reinforcing the reaction of catalytic conversion. - The water molecules are bonded with covalence and the bonding energy of the covalent bond is pretty high; the polarization can be utilized to urge the scattered water molecules to be lined up in the pulse electric field; the demodulation is utilized to allow the dissociation energies of the water molecules being capable of breaking the covalence while the polarization frequencies of the water molecules are in a state of corresponding to the modulation frequency. It is a phenomenon reaching the resonant stage and it greatly enhances the electrolyzing efficiency.
- Referring to
FIG. 5 in company withFIGS. 1 and 3 , theDC power supplier 49 can be provided with the function of the pulse width modulation (PWM) to supply the pulse type DC power to theelectrodes 20. The demodulation is utilized to control the supplied power and to reach the resonant frequency (600 Hz˜45 KHz). Further, a plurality of flat shapepiezoelectric material sheets 39 are placed at the gaps between theparallel electrodes 20. The piezoelectric material sheets such as the quartz sheets or the ceramic piezoelectric sheets are capable of forcing the mixing gas being generated from electrolyzed water molecules and moving away theelectrodes 20 rapidly for promoting the capability of expelling the mixture gas and enhancing the effect of the electrolysis with the function of the oscillation. - The electrodes in the present invention are structurally arranged as serial cells such that the gross voltage supplied at the outermost electrodes is divided as division voltages between every two neighboring serial cells.
FIGS. 1 and 5 illustrate that when the concentration of theelectrolyte 51 is controlled at PH value being 12, the controlled current density is 1 Amp/cm2. Theelectrodes 20 each have anarea 25 cm2 such that the current value shown on theDC power supplier 49 is 25 Amp with the voltage value 11.5 Volts. For the division voltages of the eightserial electrodes 20, the electrolyzing division voltage between every two neighboringelectrodes 20 is 11.5 Volts/7=1.643 Volts, the electrolyzing efficiency for the single serial division voltage is 90% (1.48/1.643=0.9), and the production rate for the mixture gas is 94.7 liter/hr. The preceding figures are much greater than the conventional art. -
FIGS. 1 and 4 show that thecarbon paper substrate 23 with ultrahigh surface contact and the micro metal particles coated on thecarbon paper substrate 23 with extremely high catalytic reaction electrolyzes the water molecules to produce the hydrogen and the oxygen; alternatively, the pulse-width-module power supplier 49 is utilized to stimulate the water molecules between theelectrodes 20 with demodulation for the water molecules constituting the resonant electrolysis in the process of the electrolyzing such that the high electrolyzing efficiency being over 90% can be reached advantageously. - Referring to
FIG. 7 , a electrolyzingstructure 7 in the third embodiment according to the present invention includes a plurality ofserial cells first conductor 74, asecond conductor 75 and a plurality of “U”-shapedthird conductors 76. Theserial cells serial cells structure 7. The structures of theserial cells serial cell 3 shown inFIG. 3 . Theserial cells first frame second frame first frames first groove second frames second groove serial cell 73 is disposed between the twoserial cells first frame 731 and thesecond frame 732 press against thesecond frame 712 and thefirst frame 721. - The
first groove 713 is joined to thefirst conductor 74; thesecond groove 724 is joined to thesecond conductor 75; thethird conductor 76 is joined to thesecond groove 714 and thefirst groove 733; Further, thethird conductor 76 is joined to thesecond groove 734, thefirst groove 723; therefore, theserial cells first conductor 74 and thesecond conductor 75 are connected to the positive pole and the negative pole of a DC power supplier, theserial cells - Referring to
FIG. 8 , an electrolyzing structure provided in the fourth embodiment according to the present invention includes a plurality ofserial cells first conductor 84 and asecond conductor 85. Theserial cells serial cells - The
serial cells first frame second frame metal sheets 813 and a plurality ofinsulation sheets 824 are disposed between the two lateral sides of both thefirst frame 811 and thesecond frame 812 respectively. Thegroove 815 of thefirst frame 811 is joined to thefirst conductor 84; thegroove 825 of thesecond frame 822 is joined to thesecond conductor 85. - The structural arrangement for the
serial cells serial cell 3 shown inFIG. 3 , but the twofirst frames same metal sheets 813, and the twosecond frames same metal sheets 813 too; the twosecond frames same metal sheets 823, and the twosecond frames same metal sheets 823; therefore, theserial cells first frames second frames second conductors serial cells - Referring to
FIG. 9 in company withFIGS. 1 and 2 , a hydrogen-oxygen electrolyzing device 9 provided in the second embodiment according to the present invention includes an AC frequency-changeable driver 90, three electrolyzingstructures first container 98, a second container 42 (shown inFIGS. 1 and 2 , and shown inFIG. 9 ), acontroller 43, afirst level sensor 44, apump 45, agas pressure sensor 46, asecond level sensor 47 and an anti backfirevalve 48. The hydrogen-oxygen electrolyzing device 9 is coupled to the three-phase power (the utility power) such that the AC frequency-changeable driver 90 and the three electrolyzingstructures oxygen electrolyzing device 9 shown inFIG. 9 almost the same as the DC hydrogen-oxygen electrolyzing device 1 shown inFIGS. 1 and 2 ; the only differences are theDC power supplier 49 and an electrolyzingstructure 2 provided by the hydrogen-oxygen electrolyzing device 1. The three electrolyzingstructures structures FIGS. 6 , 7 and 8 respectively. - Referring to
FIG. 9 again, the AC frequency-changeable driver 90 can be the conventional AC motor driver with changeable frequency and includes a three-phasefull wave rectifier 91, aninductor 92, acapacitor 93 and six insulated gate bipolar transistors (IGBT). A three-phase power is input to the three-phasefull wave rectifier 91 for being rectified with the three-phasefull wave rectifier 91, a DC voltage is output to both theinductor 92 and thecapacitor 93 from the three-phasefull wave rectifier 91, and a DC voltage approximately without ripples is obtained before passing through the sixIGBT 94. Finally, the current with three positive output ends U(+), V(+) and W(+) is output under six control procedures of the six IGBT circularly. - It can be seen in
FIG. 9 that the three positive output ends U(+), V(+) and W(+) of the AC frequency-changeable driver 90 are coupled to thefirst conductors structures changeable driver 90 is coupled to thesecond conductors structures first container 98 contains the three electrolyzingstructures first conductors second conductors first container 98. - The three positive output ends U(+), V(+) and W(+) of the AC frequency-
changeable driver 90 controls the DC power supply to thefirst conductors structures electrolyte 51 in thefirst container 98 is capable of being electrolyzed and produces the hydrogen and the oxygen. - The AC frequency
changeable driver 90 in the second embodiment according to the present invention accomplishes the following achievements: - (1) It is adaptable to the conventional frequency-changeable type power supplier and the three-phase electricity from the power company for processing the electrolysis.
- (2) It provides the changeable frequency to control the output of hydrogen-oxygen electrolysis.
- (3) The electrolyzing efficiency of the electrolyzing structure is enhanced.
- The carbon paper substrate with good properties such as electrical conductivity, thermal conductivity, porosity, permeability, hydrophicity and hydrophobility is employed to increase the maximum surface contact between the water molecules and the electrodes, the catalyst and the gas expelling capability, to prevent accumulation of the produced hydrogen and oxygen and to even the currents of the electrodes.
- The outer surfaces of the carbon paper substrate are coated with the metal or the metal compound with the electroless plating, the sputtering, the physical vapor deposition (PVD), the chemical vapor deposition (CVD) or the micro/nano powder sintering such that the two opposite catalyst layers are formed on the fiber surface for changing the material of the surface of the carbon paper substrate.
- The two material changed layers (the first metal layer and the second metal layer) on the surface of the carbon paper substrate each can be a single layer or double layers, and gradient of the respective material change layer can be platinum, rhodium, cobalt, iron and palladium or the compounds thereof.
- The pulse-width-module power supplier stimulates the water molecules between the electrodes with demodulation for the water molecules forming the resonant electrolysis in the process of electrolyzing so as to enhance the electrolyzing efficiency. The piezoelectric material sheet such as the quartz slice or the ceramic piezoelectric sheet is disposed in the gap between every two electrodes for disturbing the electrolyte evenly and reinforcing the fluidity of the produced gases for enhancing effectiveness of the electrolysis greatly.
- The electrolyte used in the present invention can be the alkaline solution such as the sodium hydroxide solution or the potassium hydroxide solution with a molar concentration in a range of 0.001M˜0.1M. The acid-base value is in a range of PH=11˜13.
- While the invention has been described with referencing to preferred embodiments thereof, it is to be understood that modifications or variations may be easily made without departing from the spirit of this invention defined by the appended claims.
Claims (35)
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TW097139001 | 2008-10-09 | ||
TW097139001A TW201014930A (en) | 2008-10-09 | 2008-10-09 | Hydrogen-oxygen electrolysis apparatus and dual-surface layer modified carbon fiber paper electrode thereof |
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US20100089746A1 true US20100089746A1 (en) | 2010-04-15 |
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US12/572,246 Abandoned US20100089746A1 (en) | 2008-10-09 | 2009-10-01 | Hydragen-oxygen electrolyzing device and carbon paper electrodes thereof with material-changed outer surfaces |
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US (1) | US20100089746A1 (en) |
EP (1) | EP2175051A1 (en) |
TW (1) | TW201014930A (en) |
Cited By (9)
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US20140174915A1 (en) * | 2012-12-20 | 2014-06-26 | Bruce J. Trott | Hydrogen/oxygen generator apparatus and system |
US20150344303A1 (en) * | 2011-07-25 | 2015-12-03 | H2 Catalyst, Llc | Methods and systems for producing hydrogen |
DE102014014091A1 (en) * | 2014-09-22 | 2016-03-24 | Etogas Gmbh | Method for operating an electrolyzer and electrolysis system |
US9816190B2 (en) | 2014-12-15 | 2017-11-14 | JOI Scientific, Inc. | Energy extraction system and methods |
US10047445B2 (en) | 2014-12-15 | 2018-08-14 | JOI Scientific, Inc. | Hydrogen generation system |
US10214820B2 (en) | 2014-12-15 | 2019-02-26 | JOI Scientific, Inc. | Hydrogen generation system with a controllable reactive circuit and associated methods |
WO2019207092A1 (en) * | 2018-04-26 | 2019-10-31 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Electrode having integrated excitation of mechanical oscillation |
US10767269B2 (en) * | 2017-06-21 | 2020-09-08 | Vital Tech, LLC | Electrolysis device |
US11111588B2 (en) * | 2019-07-18 | 2021-09-07 | Shenzhen Qianhai Yindun Energy Saving Envr. Prot. | Electrolytic reactor of oxyhydrogen machine |
Families Citing this family (3)
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TWI394867B (en) * | 2010-07-02 | 2013-05-01 | Easy Biomedical Co Ltd | Hydrogen electrolysis device with composite structure electrode plate |
EP2876187A1 (en) * | 2013-11-26 | 2015-05-27 | Nanotechlab S.A. | Plant and method for the production of oxyhydrogen |
CN106757142B (en) * | 2016-11-21 | 2020-07-03 | 沈阳化工大学 | Preparation method and application of carbon fiber loaded nanoscale bimetal PtCo catalytic electrode |
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GB1136869A (en) * | 1967-12-01 | 1968-12-18 | Albright & Wilson | Method and apparatus for performing electrolyitc processes |
US4336122A (en) | 1980-09-08 | 1982-06-22 | Ernst Spirig | Electrolysis apparatus |
US4349428A (en) * | 1981-06-01 | 1982-09-14 | The United States Of America As Represented By The U.S. Dept. Of Energy | Carbon cloth supported electrode |
CN1019590B (en) * | 1990-09-03 | 1992-12-23 | 张学明 | High-efficient electrolytic apparatus for producing hydrogen and oxygen |
IT1270878B (en) | 1993-04-30 | 1997-05-13 | Permelec Spa Nora | IMPROVED ELECTROCHEMISTRY CELL USING ION EXCHANGE MEMBRANES AND METAL BIPOLAR PLATES |
CA2312058A1 (en) | 2000-06-22 | 2001-12-22 | John Lee | Electrolytic tank for the electrolysis of a liquid |
FR2847722B1 (en) * | 2002-11-22 | 2005-09-09 | Renault Sa | REAGENT DISPENSING SYSTEM FOR FUEL CELL, FUEL CELL AND VEHICLE THUS EQUIPPED |
US7491453B2 (en) * | 2004-07-14 | 2009-02-17 | The Penn State Research Foundation | Bio-electrochemically assisted microbial reactor that generates hydrogen gas and methods of generating hydrogen gas |
-
2008
- 2008-10-09 TW TW097139001A patent/TW201014930A/en unknown
-
2009
- 2009-10-01 EP EP09171975A patent/EP2175051A1/en not_active Withdrawn
- 2009-10-01 US US12/572,246 patent/US20100089746A1/en not_active Abandoned
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150344303A1 (en) * | 2011-07-25 | 2015-12-03 | H2 Catalyst, Llc | Methods and systems for producing hydrogen |
US10259707B2 (en) * | 2011-07-25 | 2019-04-16 | H2 Catalyst, Llc | Methods and systems for producing hydrogen |
US20140174915A1 (en) * | 2012-12-20 | 2014-06-26 | Bruce J. Trott | Hydrogen/oxygen generator apparatus and system |
DE102014014091A1 (en) * | 2014-09-22 | 2016-03-24 | Etogas Gmbh | Method for operating an electrolyzer and electrolysis system |
US9816190B2 (en) | 2014-12-15 | 2017-11-14 | JOI Scientific, Inc. | Energy extraction system and methods |
US10047445B2 (en) | 2014-12-15 | 2018-08-14 | JOI Scientific, Inc. | Hydrogen generation system |
US10214820B2 (en) | 2014-12-15 | 2019-02-26 | JOI Scientific, Inc. | Hydrogen generation system with a controllable reactive circuit and associated methods |
US10767269B2 (en) * | 2017-06-21 | 2020-09-08 | Vital Tech, LLC | Electrolysis device |
WO2019207092A1 (en) * | 2018-04-26 | 2019-10-31 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Electrode having integrated excitation of mechanical oscillation |
US11111588B2 (en) * | 2019-07-18 | 2021-09-07 | Shenzhen Qianhai Yindun Energy Saving Envr. Prot. | Electrolytic reactor of oxyhydrogen machine |
Also Published As
Publication number | Publication date |
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EP2175051A1 (en) | 2010-04-14 |
TW201014930A (en) | 2010-04-16 |
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