CN117679924A - Hydrogen production purification device by sodium borohydride hydrolysis - Google Patents
Hydrogen production purification device by sodium borohydride hydrolysis Download PDFInfo
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- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 131
- 239000001257 hydrogen Substances 0.000 title claims abstract description 131
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 129
- 238000000746 purification Methods 0.000 title claims abstract description 56
- 229910000033 sodium borohydride Inorganic materials 0.000 title claims abstract description 50
- 239000012279 sodium borohydride Substances 0.000 title claims abstract description 50
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 39
- 230000007062 hydrolysis Effects 0.000 title claims abstract description 36
- 238000006460 hydrolysis reaction Methods 0.000 title claims abstract description 36
- 239000007789 gas Substances 0.000 claims abstract description 57
- 239000000446 fuel Substances 0.000 claims abstract description 43
- 239000007788 liquid Substances 0.000 claims abstract description 38
- 238000000926 separation method Methods 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims description 32
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 18
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 16
- 239000011737 fluorine Substances 0.000 claims description 16
- 229910052731 fluorine Inorganic materials 0.000 claims description 16
- 239000012784 inorganic fiber Substances 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 9
- 229920000642 polymer Polymers 0.000 claims description 9
- -1 polytetrafluoroethylene Polymers 0.000 claims description 9
- 239000011973 solid acid Substances 0.000 claims description 9
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 8
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 8
- 239000012982 microporous membrane Substances 0.000 claims description 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 5
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000002033 PVDF binder Substances 0.000 claims description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 claims description 3
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 claims description 3
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 claims description 3
- IYDGMDWEHDFVQI-UHFFFAOYSA-N phosphoric acid;trioxotungsten Chemical compound O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.OP(O)(O)=O IYDGMDWEHDFVQI-UHFFFAOYSA-N 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 3
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- 229910001930 tungsten oxide Inorganic materials 0.000 claims description 3
- 230000003301 hydrolyzing effect Effects 0.000 claims 2
- 238000012856 packing Methods 0.000 claims 1
- 230000003197 catalytic effect Effects 0.000 abstract description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 29
- 238000006243 chemical reaction Methods 0.000 description 8
- 239000012535 impurity Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000012528 membrane Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000002209 hydrophobic effect Effects 0.000 description 4
- 229920006254 polymer film Polymers 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229910003252 NaBO2 Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000010411 electrocatalyst Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011964 heteropoly acid Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910010276 inorganic hydride Inorganic materials 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 229920002959 polymer blend Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- NVIFVTYDZMXWGX-UHFFFAOYSA-N sodium metaborate Chemical compound [Na+].[O-]B=O NVIFVTYDZMXWGX-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000000629 steam reforming Methods 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 239000003930 superacid Substances 0.000 description 1
Landscapes
- Fuel Cell (AREA)
Abstract
The invention belongs to the technical field of gas purification, and particularly relates to a purification device for preparing hydrogen through sodium borohydride hydrolysis. The hydrogen production and purification device by hydrolysis consists of two units of gas-liquid separation and gas purification which are connected in series, wherein each unit consists of a porous filter layer and a shell. The device is connected to the rear end of the sodium borohydride catalytic hydrolysis hydrogen production reactor, and the generated air flow can effectively remove micro-droplets entrained in the air after passing through the purification device, and the air filtered by the device can be directly used for a hydrogen fuel cell. The device has small volume, light weight, low air resistance and high efficiency, and can be used for purifying the hydrogen at the front end of the hydrogen fuel cell.
Description
Technical Field
The invention belongs to the technical field of gas purification, and particularly relates to a purification device for preparing hydrogen through sodium borohydride hydrolysis.
Background
A fuel cell is a device that directly converts chemical energy into electric energy without going through a combustion process. The conversion process is not limited by the Carnot cycle, and the method has the characteristics of high energy conversion efficiency and environmental friendliness. The ideal fuel for a fuel cell is hydrogen.
In recent years, fuel cells have been successfully demonstrated in many fields, but a series of challenges remain to achieve large-scale commercialization thereof. Among them, development of hydrogen storage and supply technologies compatible with fuel cells is one of the core problems. The development of highly efficient hydrogen sources plays a key role in the energy efficiency and practicality of fuel cell systems.
The current industrial large-scale hydrogen production is to produce hydrogen from fossil fuels such as coal, petroleum and natural gas. Hydrocarbon steam reforming hydrogen production is the most widely used chemical hydrogen production mode at present, and the hydrogen production mode has high yield and mature technology. However, natural gas and oil and coal are non-renewable resources, and hydrogen produced by this method contains some amount of carbon monoxide. For fuel cells operating at low temperatures, the purity of the hydrogen is critical. Several tens of ppm of carbon monoxide in hydrogen can cause irreversible adsorption on the electrocatalyst, resulting in catalyst poisoning and thus reduced cell performance. Other chemical hydrogen production methods include partial oxidation reforming hydrogen production of methanol, ethanol, gasoline and the like, and the hydrogen produced by the methods contains a certain amount of carbon monoxide, and the hydrogen production equipment is complex, difficult to miniaturize and cannot meet the practical requirements of fuel cells.
To date, in compound hydrogen storage technology, inorganic hydride hydrolysis hydrogen production is one of the small-sized hydrogen production methods that have received great attention. Such hydrogen-containing compounds mainly include sodium borohydride and aluminum hydride and alkaline earth metal hydrides. Among them, sodium borohydride (NaBH 4) hydrolysis hydrogen production technology is considered to be a safe, efficient and practical hydrogen production technology. Its advantages are mainly:
1. the hydrogen storage efficiency is high. The hydrogen storage amount of NaBH4 is 30.6-wt%, and the hydrogen storage amount of saturated aqueous solution thereof also reaches 7.4-wt% under normal temperature. Compared with other hydrogen production and storage methods, the sodium borohydride has high mass hydrogen storage density and is very suitable to be used as a hydrogen source of a small-power portable fuel cell;
2. the purity of the hydrogen is high. The hydrogen generated by the hydrolysis of NaBH4 does not contain CO and other impurities, and can be directly used for a fuel cell after being purified by a special process;
3. the reaction condition is mild, the hydrogen production speed is easy to control, and the online hydrogen production can be realized. Sodium borohydride hydrolysis is an exothermic reaction that does not require additional energy to initiate and sustain the reaction and can produce hydrogen at ambient temperatures. The hydrogen production rate and amount can be controlled by controlling the amount of NaBH4 solution flowing through the catalyst or the amount of catalyst in contact with the NaBH4 solution;
4. the safety is high. Sodium borohydride is a high-density hydrogen storage material, the appearance of the sodium borohydride is white product-shaped powder, and the sodium borohydride can be stored in dry air isolated from moisture for a long time under the room temperature condition, and the sodium borohydride is very stable in property. Sodium borohydride is easy to dissolve in water, and the aqueous solution is nontoxic, nonvolatile and nonflammable, and can be stored, carried, stored and transported in a plastic container and is very safe to use.
Although sodium borohydride hydrolysis hydrogen production is an ideal hydrogen source for fuel cells with good comprehensive indexes, the following problems need to be solved in order to realize the practical application of sodium borohydride hydrolysis hydrogen production as hydrogen supply for fuel cells: although in theory, the hydrogen generated by the hydrolysis of NaBH4 does not contain CO or other impurities, in order to increase the energy density of the system, the hydrogen production device is usually smaller, and the hydrogen flow rate generated by the hydrolysis of sodium borohydride is high, so that the impurities such as NaOH and NaBO2 are entrained in the hydrogen, and if the impurities enter the fuel cell, the impurities can have serious influence on the performance of the cell. Therefore, the hydrogen produced by the hydrolysis of sodium borohydride must be strictly purified to be used in fuel cells. At present, the problem in the technical aspect of the hydrogen source of the fuel cell is not paid attention to the related research report and is less.
Disclosure of Invention
The invention aims to provide an efficient sodium borohydride hydrolysis hydrogen production purification device which meets the requirement of a hydrogen fuel cell on the purity of required hydrogen.
The invention provides a sodium borohydride hydrolysis hydrogen production purification device, which consists of two units, namely a gas-liquid separation unit and a gas purification unit, which are connected in series; wherein:
the gas-liquid separation unit consists of a porous filter layer and a shell: the shell is provided with a material inlet and a gas outlet, the porous filter layer is arranged between the material inlet and the gas outlet, the material inlet is connected with the hydrogen production system, and the gas outlet is connected with the gas purification unit;
the porous filter layer consists of inorganic fibers, a fluorine-containing polymer microporous membrane and a support keel; the inorganic fiber layer and the fluorine-containing polymer microporous membrane have low surface energy and strong hydrophobic capability, and a large number of tiny air holes are formed in the inorganic fiber layer and the fluorine-containing polymer microporous membrane, so that hydrogen can pass through the breathable membrane unhindered: naOH and NaBO entrained in hydrogen stream 2 The alkaline liquid drops are blocked by the hydrophobic effect of the membrane and cannot pass through the filter layer, and the alkaline liquid drops gather on the surface of the filter layer and quickly settle under the action of gravity, so that the hydrogen is primarily purified;
in the porous filter layer, the electrodeless fiber layer is composed of one or a mixture of a plurality of glass fibers, metal fibers or carbon fibers; the fluorine-containing high molecular microporous membrane is composed of one or a mixture of more of fluorine-containing high molecular polymers of polytetrafluoroethylene, polytrifluoroethylene, polydifluorochloroethylene or polyvinylidene fluoride;
the porous filter layer is provided with a plurality of micropores, and the diameter of the micropores is from 20 micrometers to 500 micrometers: the thickness of the porous filter layer is 2-30 mm;
the gas purifying unit is arranged at the rear end of the gas-liquid separating unit and consists of a shell and a filling material layer; the shell is provided with a material inlet and a gas outlet, the filling material is arranged between the material inlet and the gas outlet, the material inlet is connected with the gas outlet of the gas-liquid separation unit, and the gas outlet is connected with a hydrogen device for the fuel cell and the like.
The filling material consists of solid acid and the like; the solid acid is prepared from phosphotungstic acid/active carbon, sulfuric acid/zirconium dioxide, tungsten oxide/dioxygenZirconium oxide, sulfuric acid/titanium dioxide, phosphoric acid/activated alumina, nickel sulfate/activated alumina, sulfuric acid/zirconium dioxide. The solid acids are solid superacid and heteropolyacid solid acids; the hydrogen is also provided with trace NaOH and NaBO after passing through a gas-liquid separation unit 2 The alkaline liquid drops can not be removed, and the alkaline liquid drops enter a gas purification unit to be subjected to chemical reaction with solid acid, so that the hydrogen is completely purified.
The invention is based on the following principle: in order to improve the energy density of the whole system in a battery system for producing hydrogen by sodium borohydride hydrolysis and supplying hydrogen to a fuel cell, the smaller and better the hydrogen production device is required, the faster the flow rate of hydrogen produced by sodium borohydride hydrolysis is in a smaller reaction system, and NaOH and NaBO are entrained in the hydrogen flow 2 The alkaline liquid drop is a mixture of gas-liquid two phases, wherein NaOH and NaBO 2 The alkaline droplets are impurities harmful to the battery and must be removed. On the other hand, the surface energy of some inorganic fibers and fluorine-containing polymer films is relatively low, the film has very strong hydrophobic capability, the contact angle of water drops on the surface of the fluorine-containing polymer films is relatively large, the rejection effect is relatively large, and the inorganic fiber layers and the fluorine-containing polymer films have excellent chemical stability, smooth and porous surfaces, low friction coefficient and good filtering effect. If a porous membrane is made of this material to purify the gas-liquid mixture produced by the hydrolysis of sodium borohydride, hydrogen gas can freely pass through the porous membrane, while NaOH and NaBO 2 The alkaline water droplets are hindered from passing through the filter layer by the hydrophobic effect of the membrane itself. Thus realizing hydrogen, naOH and NaBO 2 The gas-liquid two phases of the iso-alkaline water droplets are separated. The hydrogen is also provided with trace NaOH and NaBO after passing through a gas-liquid separation unit 2 The alkaline liquid drops can not be removed, and the alkaline liquid drops enter the gas purification unit and then are subjected to chemical reaction with solid acid and the like, so that the efficient purification of hydrogen is realized.
The hydrogen purification device is applied to the sodium borohydride hydrolysis hydrogen production purification device, and NaOH and NaBO carried in hydrogen flow can be efficiently removed through two-stage separation, filtration and purification 2 And the impurity liquid drops meet the use requirements of the hydrogen fuel cell. The purification deviceThe device has the advantages of small volume, light weight, good hydrogen purification effect, long service life and practical value.
Drawings
FIG. 1 is a diagram showing the external structure of a gas-liquid separation unit in a purification device for producing hydrogen by hydrolysis of sodium borohydride.
FIG. 2 is a diagram showing the internal structure of a gas-liquid separation unit in the purification device for producing hydrogen by hydrolysis of sodium borohydride.
FIG. 3 is an external structural view of a gas purification unit in the sodium borohydride hydrolysis hydrogen production purification device of the invention.
FIG. 4 is a diagram showing the internal structure of a gas purification unit in the purification device for producing hydrogen by hydrolysis of sodium borohydride.
Fig. 5 is a schematic diagram of the hydrogen purification system of the present invention applied to a sodium borohydride hydrolysis hydrogen production fuel cell system.
FIG. 6 shows the effect of sodium borohydride hydrolysis hydrogen production and purification system on fuel cell performance for long time hydrogen supply to the fuel cell at 50W of hydrogen fuel cell output.
FIG. 7 shows the effect of sodium borohydride hydrolysis hydrogen production and purification system on fuel cell performance for long time hydrogen supply to the fuel cell at 300W hydrogen fuel cell output.
Reference numerals in the drawings: 101 is a material inlet of a gas-liquid separation unit, 102 is a shell of the gas-liquid separation unit, 103 is a gas outlet of the gas-liquid separation unit, and 104 is a porous filter layer in the gas-liquid separation unit; 201 is a gas purifying unit shell, 202 is a gas purifying unit gas outlet, 203 is a gas purifying unit gas inlet, 204 is a filling material layer in the gas purifying unit; 301 is a sodium borohydride catalytic reactor, 302 is a gas-liquid separation unit in a hydrogen purification device, 303 is a gas purification unit in the hydrogen purification device, and 304 is a hydrogen fuel cell.
Description of the embodiments
The invention will be further described with reference to the drawings and examples, to which embodiments of the invention are not limited.
As shown in fig. 1, the gas-liquid separation unit of the hydrogen purification device of the present invention adopts a rectangular container, the upper and lower ends of the container are provided with a gas inlet and a gas outlet, and the container includes a material inlet 101, a housing 102 and a gas outlet 103.
As shown in fig. 2, a cavity is arranged in the shell 103 between the material inlet 101 and the gas outlet 103 of the gas-liquid separation unit of the hydrogen purification device, and the porous filter layer 104 is placed in the cavity.
As shown in fig. 3, the hydrogen purification device of the present invention adopts a square container, the lower end of which is provided with an air inlet and an air outlet, the container housing 201, the gas outlet 202, and the gas inlet 203.
As shown in fig. 4, a cavity is provided in the inside of the housing 201 between the gas inlet 203 and the gas outlet 202 of the hydrogen purification device of the present invention, and the filling material 204 is placed in the cavity.
The hydrogen purification device is a group of purifiers with special separation functions for hydrogen and alkaline liquid drops: in order to improve the quality of hydrogen, the purifier carries out online and timely purification on the hydrogen generated by the catalytic reactor, and efficiently removes NaOH and NaBO carried in the hydrogen flow 2 And (3) waiting for alkaline liquid drops, wherein the purified hydrogen is directly used for fuel cells and the like: hydrogen is purified effectively in time to prevent NaOH and NaBO 2 The impurities enter the fuel cell along with the hydrogen flow to cause adverse effect on the cell performance, so that the fuel cell can work normally when the sodium borohydride hydrolyzes to produce hydrogen and supply hydrogen.
The hydrogen purification device mainly comprises two units of gas-liquid separation and gas purification which are connected in series.
The gas-liquid separation unit consists of a porous filter layer and a shell: the shell is provided with a material inlet and a gas outlet, and a porous filter layer is arranged between the material inlet and the gas outlet and consists of inorganic fibers, fluorine-containing polymer microporous membranes and supporting keels.
The porous filter layer consists of inorganic fibers and fluorine-containing high molecular polymers, the electrodeless fiber layer consists of glass fibers, metal fibers or carbon fibers, and the inorganic fiber layer consists of one or a mixture of several inorganic fibers; the fluorine-containing high molecular polymer is polytetrafluoroethylene, polytrifluoroethylene, polydifluoroethylene chloride or polyvinylidene fluoride, and the fluorine-containing high molecular microporous membrane consists of one or a plurality of high molecular polymer blends; the porous filter layer has a plurality of micropores with diameters from 20 micrometers to 500 micrometers: the porous filter layer consists of an inorganic fiber layer and a fluorine-containing high polymer film, and the thickness of the filter layer is 2-30 mm.
The gas purification unit consists of a shell and a filling material: the shell is provided with a material inlet and a gas outlet, and a filling material is arranged between the material inlet and the gas outlet.
The filling material consists of one or a mixture of more solid acids of phosphotungstic acid/activated carbon, sulfuric acid/zirconium dioxide, tungsten oxide/zirconium dioxide, sulfuric acid/titanium dioxide, phosphoric acid/activated alumina, nickel sulfate/activated alumina and sulfuric acid/zirconium dioxide.
As shown in fig. 5, the sodium borohydride hydrolysis hydrogen production device of the present invention comprises a catalytic reactor 301, hydrogen purification devices 302 and 303 and a fuel cell 304, wherein the purifier comprises a gas-liquid separation unit, a gas purification unit and a shell.
Examples
The sodium borohydride hydrolysis hydrogen production purification device comprises a sodium borohydride catalytic reactor, a hydrogen purification device and auxiliary spare parts: the hydrogen purification device mainly comprises two units of gas-liquid separation and gas purification which are connected in series.
The sodium borohydride water solution raw material is directly poured into a catalytic reactor, a material inlet pipeline of the catalytic reactor is connected with an inlet of a hydrogen purification device, and a gas outlet of the hydrogen purification device is connected with a hydrogen inlet of a fuel cell through a pipeline.
The method of the invention is used for supplying hydrogen to the fuel cell, the rated output power of the fuel cell is 50W, and the cell operates in a normal pressure self-humidifying mode. The performance of the sodium borohydride hydrolysis hydrogen production device under the condition of small gas flow is tested, the working current of the fuel cell is 4.5A, the hydrogen flow is 0.7L/min, as shown in fig. 6, the sodium borohydride hydrolysis hydrogen production method disclosed by the invention is adopted to supply hydrogen for the small gas flow of the fuel cell, and the performance of the cell is stable after 80 hours of continuous operation.
Examples
The sodium borohydride hydrolysis hydrogen production method of the invention supplies hydrogen for the fuel cell, the rated output power of the fuel cell is 300W, and the cell operates in a normal pressure self-humidifying mode. The performance of the sodium borohydride hydrolysis hydrogen production device at large gas flow was examined, the fuel cell operating current was 8.5A, the hydrogen flow was 3.5L/min, as shown in figure 7,
the sodium borohydride hydrolysis hydrogen production purification device is used for supplying hydrogen for the large gas flow of the fuel cell, and the performance of the cell is stable after 30 hours of continuous operation.
Claims (4)
1. The device is characterized by comprising a gas-liquid separation unit and a gas purification unit which are connected in series; wherein:
the gas-liquid separation unit consists of a porous filter layer and a shell: the shell is provided with a material inlet and a gas outlet, the porous filter layer is arranged between the material inlet and the gas outlet, the material inlet is connected with the hydrogen production system, and the gas outlet is connected with the gas purification unit;
the porous filter layer consists of inorganic fibers, a fluorine-containing polymer microporous membrane and a support keel;
the gas purifying unit is arranged at the rear end of the gas-liquid separating unit and consists of a shell and a filling material layer; the shell is provided with a material inlet and a gas outlet, the filling material is arranged between the material inlet and the gas outlet, the material inlet is connected with the gas outlet of the gas-liquid separation unit, and the gas outlet is connected with a hydrogen device for the fuel cell and the like.
2. The purification device for producing hydrogen by hydrolyzing sodium borohydride according to claim 1, wherein the porous filter layer of the gas-liquid separation unit comprises an electrodeless fiber layer which is one or a mixture of several of glass fiber, metal fiber or carbon fiber; the fluorine-containing high molecular microporous membrane is composed of one or a mixture of more of fluorine-containing high molecular polymers of polytetrafluoroethylene, polytrifluoroethylene, polydifluorochloroethylene or polyvinylidene fluoride.
3. The purification device for producing hydrogen by hydrolyzing sodium borohydride according to claim 2, wherein the porous filter layer has a plurality of micropores with diameters of 20 micrometers to 500 micrometers: the thickness of the porous filter layer is 2 mm-30 mm.
4. The apparatus for purifying hydrogen by hydrolysis of sodium borohydride according to claim 1, wherein the packing material in the gas purification unit is composed of a solid acid; the solid acid is composed of one or a mixture of more of phosphotungstic acid/activated carbon, sulfuric acid/zirconium dioxide, tungsten oxide/zirconium dioxide, sulfuric acid/titanium dioxide, phosphoric acid/activated alumina, nickel sulfate/activated alumina and sulfuric acid/zirconium dioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311497416.4A CN117679924A (en) | 2023-11-10 | 2023-11-10 | Hydrogen production purification device by sodium borohydride hydrolysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311497416.4A CN117679924A (en) | 2023-11-10 | 2023-11-10 | Hydrogen production purification device by sodium borohydride hydrolysis |
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| Publication Number | Publication Date |
|---|---|
| CN117679924A true CN117679924A (en) | 2024-03-12 |
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|---|---|---|---|
| CN202311497416.4A Pending CN117679924A (en) | 2023-11-10 | 2023-11-10 | Hydrogen production purification device by sodium borohydride hydrolysis |
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| Country | Link |
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