US20180371628A1 - Device for generating hydrogen peroxide - Google Patents
Device for generating hydrogen peroxide Download PDFInfo
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- US20180371628A1 US20180371628A1 US16/062,534 US201616062534A US2018371628A1 US 20180371628 A1 US20180371628 A1 US 20180371628A1 US 201616062534 A US201616062534 A US 201616062534A US 2018371628 A1 US2018371628 A1 US 2018371628A1
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- hydrogen peroxide
- electrolytic solution
- generating hydrogen
- electrolytic cell
- oxygen
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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
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/28—Per-compounds
- C25B1/30—Peroxides
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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
- 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
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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
- C25B15/00—Operating or servicing cells
- C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
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- C25B9/06—
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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
- C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
Definitions
- Embodiments relates to a device for generating hydrogen peroxide.
- Patent Literature 1 Japanese Patent Application Laid-open No. 2004-10904
- Patent Literature 2 Japanese Patent Application Laid-open No. 2007-162033
- Patent Literature 3 Japanese Patent Application Laid-open No. 2002-317287
- the method in which hydrogen peroxide water having a small percent of concentration is diluted requires time and effort for supplying a medical agent, and is not versatile.
- the device for generating hydrogen peroxide water using an electrolysis method has a lower generation efficiency of hydrogen peroxide and cannot generate hydrogen peroxide water in high concentration.
- a device for generating hydrogen peroxide of the embodiments includes an electrolytic cell, a pair of electrodes, and a circulation pipe.
- the electrolytic cell holds an electrolytic solution.
- the pair of electrodes is provided in the electrolytic cell and electrolyzes the electrolytic solution.
- the circulation pipe is connected to the electrolytic cell, and causes oxygen generated from the electrolytic solution that has been electrolyzed in the electrolytic cell to flow into the electrolytic cell.
- FIG. 1 is a view illustrating the whole configuration of a device for generating hydrogen peroxide according to a first embodiment
- FIG. 2 is a view illustrating the whole configuration of a device for generating hydrogen peroxide according to a second embodiment
- FIG. 3 is a view illustrating the whole configuration of a device for generating hydrogen peroxide according to a first comparison example
- FIG. 4 is a view illustrating the whole configuration of a device for generating hydrogen peroxide according to a second comparison example.
- FIG. 5 is experiment results of concentration of generated hydrogen peroxide water according to the embodiment examples and comparison examples.
- Embodiments and modifications exemplified below include like components.
- like reference signs are assigned to the like components, and overlapped explanation is partially omitted.
- a part included in the embodiments and modifications can be replaced with the corresponding part in other embodiments and modifications.
- the configuration, the position, and the like of a part included in the embodiments and modifications are, unless specifically mentioned, the same as those of other embodiments and modifications.
- Hydrogen peroxide water generates hydrogen peroxide water in high concentration by returning oxygen generated from an electrolytic solution that has been electrolyzed in an electrolytic cell back to the electrolytic solution in the electrolytic cell, and increasing dissolved oxygen concentration of the electrolytic solution.
- FIG. 1 is a view illustrating the whole configuration of a device 10 for generating hydrogen peroxide according to a first embodiment.
- the device 10 for generating hydrogen peroxide includes an electrolytic cell 12 , an electrode 14 , an electrode 16 , a storage tank 18 , a raw water pump 20 , a circulation pump 22 , valves 26 and 28 , and pipes 30 , 32 , 34 , 36 , 38 , and 40 .
- the pipes 30 , 34 , and 38 are an example of a circulation pipe.
- the electrolytic cell 12 holds an electrolytic solution 80 for generating hydrogen peroxide water by electrolysis.
- the electrolytic solution 80 is, for example, pure water or salt water. Examples of pure water include tap water. Examples of salt water include a sodium sulfate solution in concentration of 0.05 mol/L.
- the electrodes 14 and 16 are provided in the electrolytic cell 12 . More specifically, the electrodes 14 and 16 are provided in the electrolytic solution 80 held in the electrolytic cell 12 . The electrodes 14 and 16 are disposed in parallel with a constant space from each other.
- the electrode 14 is connected to a negative electrode of a direct current (DC) power source 90 .
- the electrode 14 functions as a cathode.
- the electrode 16 is connected to a positive electrode of the DC power source 90 .
- the electrode 16 functions as an anode.
- the electrodes 14 and 16 are connected to the DC power source 90 so that polarity can be reversed. In other words, the electrode 14 may function as an anode, and the electrode 16 may function as a cathode.
- a space between the electrodes 14 and 16 is not specifically limited, but the space is preferably, when a voltage of 10 V to 20 V is applied, made about 2 mm to 10 mm.
- the electrodes 14 and 16 have the same shape, and are formed in a rectangular shape of the same size. It is preferable that the electrodes 14 and 16 have a specific surface area (or reactive area) capable of generating sufficient hydrogen peroxide water.
- the electrodes 14 and 16 include, for example, carbon. Specifically, it is preferable that the electrodes 14 and 16 be formed by dispersing highly activated carbon black (for example, VulcanXC-72 made by Cabot corporation) on a Teflon (registered mark) dispersing agent and applying the dispersed carbon black on a carbon sheet or pressing the carbon black in a carbon sheet shape and pressing the pressed carbon black in a metal current collector so as to sinter the carbon black, and the like.
- the electrode 16 may be formed of, for example, a platinum plate, a steel use stainless (SUS) plate, and an insolubilized electrode (dimension stable anode (DSA)).
- the pipe 30 is connected to an upper part of the electrolytic cell 12 .
- the pipe 32 is an example of a discharge pipe.
- the pipe 32 is connected to the pipe 30 and an outside holding unit 92 .
- the pipes 30 and 32 connect the upper part of the electrolytic cell 12 and the outside holding unit 92 together.
- the pipes 30 and 32 discharge a part of the electrolyzed electrolytic solution 80 as hydrogen peroxide water 88 from the upper part of the electrolytic cell 12 to the holding unit 92 .
- the valve 26 is an example of a pressure adjusting unit.
- the valve 26 is provided to a middle part of the pipe 32 .
- the valve 26 adjusts pressure and a discharge amount of the discharged electrolytic solution 80 (in other words, the hydrogen peroxide water 88 ) so that circulation pressure of the electrolytic solution 80 can be made equal to or greater than atmospheric pressure.
- the pipe 30 and the pipe 34 connected to the pipe 30 are connected to the upper part of the electrolytic cell 12 and the storage tank 18 .
- the pipes 30 and 34 connect the electrolytic cell 12 and the storage tank 18 together.
- the pipes 30 and 34 cause the electrolytic solution 80 including a gas bubbles 84 of oxygen generated from the electrolytic solution 80 that has been electrolyzed by the electrodes 16 and 14 to flow from the upper part of the electrolytic cell 12 into the storage tank 18 .
- the pipe 36 connects the storage tank 18 and an outside electrolytic solution supply source 94 together.
- the raw water pump 20 is provided to a middle part of the pipe 36 .
- the raw water pump 20 supplies the electrolytic solution 80 from the electrolytic solution supply source 94 to the storage tank 18 through the pipe 36 .
- the storage tank 18 stores therein the electrolytic solution 80 that is supplied from the outside electrolytic solution supply source 94 and that is supplied to the electrolytic cell 12 .
- the storage tank 18 is provided between the pipes 34 and 38 , in other words, to a middle part of the circulation pipe.
- the storage tank 18 stores therein the electrolytic solution 80 including the gas bubbles 84 of oxygen that has been sent from the electrolytic cell 12 through the pipes 30 and 30 .
- the pipe 38 connects the storage tank 18 and a lower part of the electrolytic cell 12 together.
- the pipe 38 supplies the electrolytic solution 80 of the storage tank 18 to the lower part of the electrolytic cell 12 .
- the pipe 38 causes the electrolytic solution 80 including the gas bubbles 84 of oxygen that has been sent from the electrolytic cell 12 to the storage tank 18 by the pipes 30 and 34 to flow into the electrolytic cell 12 .
- the pipes 30 , 34 , and 38 are connected to the electrolytic cell 12 , and function as a circulation pipe that causes oxygen generated from the electrolytic solution 80 that has been electrolyzed in the electrolytic cell 12 to flow into the electrolytic cell 12 .
- the circulation pump 22 is an example of a circulation member and a supply unit, and is provided to a middle part of the pipe 38 that is a part of the circulation pipe.
- the circulation pump 22 applies pressure to the electrolytic solution 80 including oxygen that flows in the pipe 38 , and causes the electrolytic solution 80 to flow into the electrolytic cell 12 . It is preferable that the circulation pump 22 supply the electrolytic solution 80 to the electrolytic cell 12 with pressure equal to or greater than atmospheric pressure.
- the pipe 40 is an example of an exhaust pipe, and is connected to the upper part of the storage tank 18 .
- the valve 28 is provided to a middle part of the pipe 40 .
- the pipe 40 exhausts, in a gas layer 86 where the gas bubbles 84 of oxygen generated at the electrode 16 of the electrolytic cell 12 is separated into gas and liquid, a part from the upper part of the storage tank 18 .
- the valve 28 adjusts an exhaust gas amount of the gas layer 86 so that circulation pressure of the electrolytic solution 80 can be maintained equal to or greater than atmospheric pressure.
- the following describes operation of the device 10 for generating hydrogen peroxide according to the first embodiment.
- the DC power source 90 applies a DC voltage to the electrodes 16 and 14 .
- the electrodes 14 and 16 electrolyze the electrolytic solution 80 in the electrolytic cell 12 .
- electrolysis of water as the electrolytic solution 80 that has been caused by the electrodes 14 and 16 that function as a cathode and an anode, respectively, the following reaction is advanced.
- hydrogen peroxide is secondarily generated by oxidation action of H 2 O of the OH ⁇ radicals generated on the electrode 14 side.
- the reaction On the electrode 14 side, as the dissolved oxygen concentration of the electrolytic solution 80 indicated on the left side of the first reaction is higher, the reaction is advanced to the right side in a chemical equilibrium manner. On the electrode 16 side, oxygen is generated by the second reaction. Usually, on a surface of the electrode 16 , the oxygen concentration becomes supersaturated, and oxygen is discharged as the gas bubbles 84 . A part of the gas bubbles 84 is slowly dissolved in the electrolytic solution 80 , but most of the remaining gas bubbles 84 are supplied from the electrolytic cell 12 to the storage tank 18 through the pipes 30 and 34 .
- the device 10 for generating hydrogen peroxide according to the embodiment circulates the electrolytic solution 80 with the gas bubbles 84 through the storage tank 18 and the like, and returns the electrolytic solution 80 to the electrolytic cell 12 . In this manner, the device 10 for generating hydrogen peroxide increases the dissolved oxygen concentration of the electrolytic solution 80 in the electrolytic cell 12 .
- the device 10 for generating hydrogen peroxide has retention time of the electrolytic solution 80 including the gas bubbles 84 elongated by providing the storage tank 18 to a middle part of the circulation path of the electrolytic solution 80 .
- the gas bubbles 84 are further dissolved in the electrolytic solution 80 .
- Nitrogen dissolved in the electrolytic solution 80 that has been supplied from the electrolytic solution supply source 94 to the storage tank 18 is exhausted based on Charles's law by dissolving the gas bubbles 84 in the electrolytic solution 80 .
- the dissolved oxygen concentration in the electrolytic solution 80 is increased for partial pressure of the gas bubbles 84 from oxygen generated by the electrode 16 .
- Exhausted nitrogen and oxygen that is not dissolved in the electrolytic solution 80 are separated from the electrolytic solution 80 , and become the gas layer 86 on the upper part of the storage tank 18 .
- the valve 28 exhausts a part of the gas layer 86 while adjusting an exhaust gas amount so that circulation pressure of the electrolytic solution 80 can be maintained equal to or greater than atmospheric pressure.
- the valve 26 discharges the electrolytic solution 80 having higher concentration of hydrogen peroxide water as the hydrogen peroxide water 88 to the outside while adjusting a discharge amount so that circulation pressure of the electrolytic solution 80 can be maintained equal to or greater than atmospheric pressure.
- inorganic ions such as calcium that are dissolved in the electrolytic solution 80 are secondarily generated as side reaction by the following third reaction.
- the generated inorganic ions cause deterioration in the electrode 14 .
- the electrodes 14 and 16 when the electrodes 14 and 16 are formed of the same material and are formed in the same shape, polarity of the electrodes 14 and 16 can be regularly reversed.
- the electrode 16 is connected to a negative electrode of the DC power source 90
- the electrode 14 is connected to a positive electrode of the DC power source 90 .
- the electrode 16 functions as a cathode
- the electrode 14 functions as an anode.
- the device 10 for generating hydrogen peroxide dissolves, as indicated in fourth reaction, inorganic ions such as calcium that have been deposited on the electrode 14 functions as an anode in the electrolytic solution 80 , and discharges the dissolved inorganic ions with the electrolytic solution 80 to the outside.
- the electrode 14 functioning as an anode advances the second reaction and generates oxygen
- the electrode 16 functioning as a cathode generates the first reaction.
- the device 10 for generating hydrogen peroxide can advance the above-mentioned reaction while regenerating the electrode 14 the polarity of which has been reversed from a cathode to an anode and extending life thereof.
- the device 10 for generating hydrogen peroxide includes the pipes 30 and 34 that cause the electrolytic solution 80 to flow from the electrolytic cell 12 into the storage tank 18 .
- the device 10 for generating hydrogen peroxide causes the electrolytic solution 80 including many of the gas bubbles 84 of oxygen that has been electrolyzed in the electrolytic cell 12 by the electrodes 14 and 16 to flow from the electrolytic cell 12 into the storage tank 18 and the electrolytic solution 80 to be circulated so as to increase the dissolved oxygen concentration of the electrolytic solution 80 in the storage tank 18 .
- the device 10 for generating hydrogen peroxide can supply the electrolytic solution 80 having high dissolved oxygen concentration to the electrolytic cell 12 , so as to advance the first reaction to the right and increase concentration of hydrogen peroxide.
- the device 10 for generating hydrogen peroxide can generate the hydrogen peroxide water 88 having concentration from several 10 ppm to several 100 ppm.
- the device 10 for generating hydrogen peroxide includes the storage tank 18 .
- the device 10 for generating hydrogen peroxide can store the electrolytic solution 80 flowing from the electrolytic cell 12 into the storage tank 18 , dissolve the gas bubbles 84 of oxygen in the electrolytic solution 80 , and increase the dissolved oxygen concentration.
- the device 10 for generating hydrogen peroxide can advance the first reaction to the right, and generate the hydrogen peroxide water 88 in higher concentration.
- the device 10 for generating hydrogen peroxide includes the circulation pump 22 , and can maintain pressure of the electrolytic solution 80 flowing in the pipe 38 equal to or greater than atmospheric pressure. Thus, the device 10 for generating hydrogen peroxide can increase the dissolved oxygen concentration in the electrolytic solution 80 .
- the device 10 for generating hydrogen peroxide includes the pipe 40 that is connected to the upper part of the storage tank 18 and the valve 28 .
- the device 10 for generating hydrogen peroxide can exhaust the gas layer 86 on the upper part of the storage tank 18 through the pipe 40 and the valve 28 while maintaining pressure applied to the electrolytic solution 80 that has been stored in the storage tank 18 equal to or greater than atmospheric pressure.
- the device 10 for generating hydrogen peroxide can increase dissolved oxygen concentration in the electrolytic solution 80 .
- the device 10 for generating hydrogen peroxide includes the pipe 30 connected to the upper part of the electrolytic cell 12 , the pipe 32 , and the valve 26 .
- the device 10 for generating hydrogen peroxide can discharge the electrolytic solution 80 (or the hydrogen peroxide water 88 ) of the electrolytic cell 12 through the pipes 30 and 32 , and the valve 26 while maintaining pressure applied to the electrolytic solution 80 of the electrolytic cell 12 equal to or greater than atmospheric pressure.
- FIG. 2 is a view illustrating the whole configuration of a device 110 for generating hydrogen peroxide according to a second embodiment.
- the device 110 for generating hydrogen peroxide includes the electrolytic cell 12 , the electrodes 14 and 16 , a gas-liquid separation tank 118 , a raw water pump 120 , a compressor 122 , valves 126 and 128 , pipes 130 , 132 , 134 , 136 , 138 , and 140 , and a diffuser tube 142 .
- the pipes 130 , 134 , and 138 are an example of the circulation pipe.
- the pipe 132 connects a lower part of the gas-liquid separation tank 118 and the outside holding unit 92 .
- the valve 126 is provided to a middle part of the pipe 132 .
- the pipe 132 discharges the electrolyzed electrolytic solution 80 as the hydrogen peroxide water 88 from the upper part of the electrolytic cell 12 to the holding unit 92 .
- the valve 126 adjusts a discharge amount of the hydrogen peroxide water 88 so that pressure of the discharged electrolytic solution 80 can be made equal to or greater than atmospheric pressure.
- the pipe 134 connects the upper part of the electrolytic cell 12 and the gas-liquid separation tank 118 .
- the 134 causes the electrolytic solution 80 including the gas bubbles 84 of oxygen that has been electrolyzed by the electrodes 16 and 14 to flow from the upper part of the electrolytic cell 12 into the gas-liquid separation tank 118 .
- the gas-liquid separation tank 118 is provided between the pipes 138 and 134 , to a middle part of the circulation pipe.
- the gas-liquid separation tank 118 holds the electrolytic solution 80 that has been electrolyzed in the electrolytic cell 12 with the gas bubbles 84 of oxygen.
- the gas-liquid separation tank 118 separates the electrolytic solution 80 into a liquid phase 180 that is discharged as the hydrogen peroxide water 88 and a gas layer 186 including oxygen that has been generated at the electrode 16 of the electrolytic cell 12 .
- the pipe 130 is connected to an upper part of the gas-liquid separation tank 118 .
- the pipe 140 is connected to a middle part of the pipe 130 .
- the pipe 140 is an example of a branch pipe, and branches from the pipe 130 that is a part of the circulation pipe.
- the pipe 140 is connected to the outside, and exhausts the gas layer 186 in the gas-liquid separation tank 118 .
- the valve 128 is provided to a middle part of the pipe 140 .
- the pipes 130 and 140 exhaust a part from the gas layer 186 that has been separated into gas and liquid from the upper part of the gas-liquid separation tank 118 .
- the valve 128 adjusts an exhaust gas amount of the gas layer 186 so that circulation pressure of the electrolytic solution 80 can be maintained equal to or greater than atmospheric pressure.
- the pipe 136 connects the electrolytic cell 12 and the outside electrolytic solution supply source 94 together.
- the raw water pump 120 is provided to a middle part of the pipe 136 .
- the raw water pump 120 is an example of a supply unit, and directly supplies the electrolytic solution 80 from the electrolytic solution supply source 94 to the gas-liquid separation tank 118 through the pipe 136 . It is preferable that the raw water pump 120 supply the electrolytic solution 80 to the electrolytic cell 12 with pressure equal to or greater than atmospheric pressure.
- the pipe 130 and the pipe 138 connected to a middle part of the pipe 130 connect the upper part of the gas-liquid separation tank 118 and the electrolytic cell 12 .
- the pipe 138 is connected to the lower part of the electrolytic cell 12 at a lower part than the diffuser tube 142 .
- the pipes 130 and 138 cause the gas layer 186 on the upper part of the gas-liquid separation tank 118 to flow into the electrolytic cell 12 .
- the compressor 122 is an example of a circulation member, and is provided to a middle part of the pipe 138 that is a part of the circulation pipe.
- the compressor 122 applies pressure to gas of the gas layer 186 including oxygen of the gas-liquid separation tank 118 that flows in the pipes 130 and 138 , and causes the gas of the gas layer 186 to flow from the gas-liquid separation tank 118 into the electrolytic cell 12 .
- the diffuser tube 142 is an air diffuser that has, for example, a round shape, a plate shape, and the other shape.
- the diffuser tube 142 is provided to a lower part of the electrolytic cell 12 .
- the diffuser tube 142 disperses, through the pipes 134 , 130 , and 138 and the gas-liquid separation tank 118 , gas of the gas layer 186 including oxygen that flows into the electrolytic cell 12 in the electrolytic cell 12 , and diffuses the dispersed gas as the gas bubbles 84 .
- the device 110 for generating hydrogen peroxide causes the compressor 122 to send gas of the oxygen-rich gas layer 186 that includes oxygen generated at the electrode 16 and has been separated into gas and liquid at the gas-liquid separation tank 118 to the electrolytic cell 12 .
- the device 110 for generating hydrogen peroxide can increase the dissolved oxygen concentration of the electrolytic solution 80 in the electrolytic cell 12 , advance the first reaction to the right, and generate the hydrogen peroxide water 88 in higher concentration.
- the device 110 for generating hydrogen peroxide having the sufficiently large electrolytic cell 12 and the electrodes 14 and 16 generates the sufficiently oxygen-rich gas bubbles 84 in the electrolytic cell 12 , and has a contact time of the electrode 14 with the gas bubbles 84 of oxygen elongated so as to dissolve the gas bubbles 84 having high oxygen concentration in the electrolytic solution 80 .
- this kind of device 110 for generating hydrogen peroxide can generate the hydrogen peroxide water 88 having sufficiently high concentration, for example, from several 10 ppm to several 100 ppm.
- the device 110 for generating hydrogen peroxide includes the diffuser tube 142 that diffuses oxygen as gas bubbles 84 supplied to the electrolytic cell 12 as the gas in the electrolytic cell 12 .
- the device 110 for generating hydrogen peroxide can further enhance contact of the gas bubbles 84 with the electrode 14 , and can further improve the concentration of the hydrogen peroxide water 88 .
- valve 128 exhausts gas of the gas layer 186 while adjusting an exhaust gas amount and pressure through the pipes 130 and 140 , dissolved nitrogen due to chemical equilibrium of atmospheric contact in the electrolytic solution 80 that has been supplied from the outside electrolytic solution supply source 94 to the electrolytic cell 12 can be easily exhausted from the gas layer 186 in the gas-liquid separation tank 118 .
- the device 110 for generating hydrogen peroxide can further advance the first reaction to the right with chemical equilibrium, and can improve the concentration of generated hydrogen peroxide water.
- FIG. 3 is a view illustrating the whole configuration of a device 210 for generating hydrogen peroxide according to a first comparison example.
- FIG. 4 is a view illustrating the whole configuration of a device 310 for generating hydrogen peroxide according to a second comparison example. The following describes the device 210 for generating hydrogen peroxide according to the first comparison example and the device 310 for generating hydrogen peroxide according to the second comparison example as compared with the embodiments.
- an electrolytic solution 280 is supplied by a raw water pump 220 from the outside to an electrolytic cell 212 through a pipe 236 .
- An electrode 214 is connected to a negative electrode of a DC power source 290 , and functions as a cathode.
- the electrode 216 is connected to a positive electrode of the DC power source 290 , and functions as an anode.
- the DC power source 290 applies a voltage to the electrodes 214 and 216
- the electrodes 214 and 216 electrolyze the electrolytic solution 280 .
- Hydrogen peroxide water 288 with oxygen generated at the electrode 216 is discharged to the outside through a pipe 232 .
- the electrode 214 cannot obtain a sufficient contact time with oxygen. Due to chemical equilibrium of atmospheric contact of the supplied electrolytic solution 280 and oxygen partial pressure of air, the device 210 for generating hydrogen peroxide cannot advance the first chemical reaction to the right in a chemical equilibrium manner and increase the concentration of the hydrogen peroxide water 288 .
- the electrode 216 functioning as an anode is formed of an inexpensive material such as SUS, a surface of the electrode 216 is flat, the electrode area is smaller, and activity generating hydrogen peroxide water is reduced. Thus, the concentration of hydrogen peroxide water cannot be increased by reversing the polarity of the electrodes 214 and 216 , and depositing and removing calcium and the like.
- the device 310 for generating hydrogen peroxide according to the second comparison example further includes a diffuser tube 342 provided to a lower part of the electrolytic cell 212 , a pipe 338 connected to a supply source of oxygen, and a compressor 322 provided to a middle part of the pipe 338 .
- the compressor 322 supplies oxygen to the electrolytic cell 212 at a lower part than the diffuser tube 342 through the pipe 236 .
- the device 310 for generating hydrogen peroxide can increase the dissolved oxygen concentration of the electrolytic solution 280 in the electrolytic cell 212 .
- oxygen that cannot be dissolved in the electrolytic solution 280 supplied from the outside and oxygen generated at the electrode 216 are discharged with the hydrogen peroxide water 288 .
- cost is increased in order to install a device for generating oxygen for supplying oxygen or a device for supplying oxygen such as an oxygen tank.
- the device 10 for generating hydrogen peroxide according to first embodiment is defined as a first embodiment example, and the device 110 for generating hydrogen peroxide is defined as a second embodiment example.
- a Pt (platinum) plate is used as the electrode 216 functioning as an anode according to the first and second comparison examples.
- a carbon electrode is used as the electrode 16 functioning as an anode according to the first and second embodiment examples.
- Carbon electrodes are used as the electrodes 14 and 214 functioning as a cathode.
- the size of the electrodes 14 , 16 , 214 , and 216 is 2 cm ⁇ 4 cm.
- the space between the electrodes 14 and 16 , and between the electrodes 214 and 216 is 10 mm.
- FIG. 5 is the experiment results of the concentration of generated hydrogen peroxide water according to the embodiment examples and comparison examples.
- FIG. 5 illustrates that hydrogen peroxide water in high concentration can be generated in the first and second embodiment examples where carbon electrodes are used as the electrodes 14 and 16 as compared with the first and second comparison examples where the Pt electrode is used as the electrode 216 and a carbon electrode is used as the electrode 214 .
- the diffuser tube 142 in the second embodiment may be provided to the first embodiment.
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Abstract
Description
- Embodiments relates to a device for generating hydrogen peroxide.
- These days, there has been an increasing interest in anti-virus measures and bacterial eradication measures due to an epidemic of novel influenza and the like. In response to the request of these bacterial eradication and anti-virus measures, hydrogen peroxide water is sprayed in the form of mist so as to eradicate bacteria. In the water purification and sewage field, there has been developed a technique for supplying hydrogen peroxide to raw water, generating hydroxyl (OH) radicals through ultraviolet (UV) irradiation and ozone diffusion, and performing sterilization using powerful oxidation action of the radicals. In a part of the fields such as effluent processing, hydrogen peroxide water is used.
- In generation of hydrogen peroxide water used for bacterial eradication, conventionally, there has been known a method in which hydrogen peroxide water having a small percent of concentration is diluted. There has been known a device for generating hydrogen peroxide water using an electrolysis method in which a pair of electrode plates is located and inserted in the water so as to face each other, and electrolyzes water that is an electrolytic solution.
- Patent Literature 1: Japanese Patent Application Laid-open No. 2004-10904
- Patent Literature 2: Japanese Patent Application Laid-open No. 2007-162033
- Patent Literature 3: Japanese Patent Application Laid-open No. 2002-317287
- However, the method in which hydrogen peroxide water having a small percent of concentration is diluted requires time and effort for supplying a medical agent, and is not versatile. The device for generating hydrogen peroxide water using an electrolysis method has a lower generation efficiency of hydrogen peroxide and cannot generate hydrogen peroxide water in high concentration.
- A device for generating hydrogen peroxide of the embodiments includes an electrolytic cell, a pair of electrodes, and a circulation pipe. The electrolytic cell holds an electrolytic solution. The pair of electrodes is provided in the electrolytic cell and electrolyzes the electrolytic solution. The circulation pipe is connected to the electrolytic cell, and causes oxygen generated from the electrolytic solution that has been electrolyzed in the electrolytic cell to flow into the electrolytic cell.
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FIG. 1 is a view illustrating the whole configuration of a device for generating hydrogen peroxide according to a first embodiment; -
FIG. 2 is a view illustrating the whole configuration of a device for generating hydrogen peroxide according to a second embodiment; -
FIG. 3 is a view illustrating the whole configuration of a device for generating hydrogen peroxide according to a first comparison example; -
FIG. 4 is a view illustrating the whole configuration of a device for generating hydrogen peroxide according to a second comparison example; and -
FIG. 5 is experiment results of concentration of generated hydrogen peroxide water according to the embodiment examples and comparison examples. - Embodiments and modifications exemplified below include like components. Hereinafter, like reference signs are assigned to the like components, and overlapped explanation is partially omitted. A part included in the embodiments and modifications can be replaced with the corresponding part in other embodiments and modifications. The configuration, the position, and the like of a part included in the embodiments and modifications are, unless specifically mentioned, the same as those of other embodiments and modifications.
- Hydrogen peroxide water according to the embodiments generates hydrogen peroxide water in high concentration by returning oxygen generated from an electrolytic solution that has been electrolyzed in an electrolytic cell back to the electrolytic solution in the electrolytic cell, and increasing dissolved oxygen concentration of the electrolytic solution.
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FIG. 1 is a view illustrating the whole configuration of adevice 10 for generating hydrogen peroxide according to a first embodiment. Thedevice 10 for generating hydrogen peroxide includes anelectrolytic cell 12, anelectrode 14, anelectrode 16, astorage tank 18, araw water pump 20, acirculation pump 22,valves pipes pipes - The
electrolytic cell 12 holds anelectrolytic solution 80 for generating hydrogen peroxide water by electrolysis. Theelectrolytic solution 80 is, for example, pure water or salt water. Examples of pure water include tap water. Examples of salt water include a sodium sulfate solution in concentration of 0.05 mol/L. - The
electrodes electrolytic cell 12. More specifically, theelectrodes electrolytic solution 80 held in theelectrolytic cell 12. Theelectrodes electrode 14 is connected to a negative electrode of a direct current (DC)power source 90. Theelectrode 14 functions as a cathode. Theelectrode 16 is connected to a positive electrode of theDC power source 90. Theelectrode 16 functions as an anode. Theelectrodes DC power source 90 so that polarity can be reversed. In other words, theelectrode 14 may function as an anode, and theelectrode 16 may function as a cathode. When theDC power source 90 applies a voltage to theelectrodes electrodes electrolytic solution 80. A space between theelectrodes - The
electrodes electrodes electrodes electrodes electrode 16 may be formed of, for example, a platinum plate, a steel use stainless (SUS) plate, and an insolubilized electrode (dimension stable anode (DSA)). - The
pipe 30 is connected to an upper part of theelectrolytic cell 12. Thepipe 32 is an example of a discharge pipe. Thepipe 32 is connected to thepipe 30 and anoutside holding unit 92. Thepipes electrolytic cell 12 and theoutside holding unit 92 together. Thepipes electrolytic solution 80 ashydrogen peroxide water 88 from the upper part of theelectrolytic cell 12 to theholding unit 92. - The
valve 26 is an example of a pressure adjusting unit. Thevalve 26 is provided to a middle part of thepipe 32. Thevalve 26 adjusts pressure and a discharge amount of the discharged electrolytic solution 80 (in other words, the hydrogen peroxide water 88) so that circulation pressure of theelectrolytic solution 80 can be made equal to or greater than atmospheric pressure. - The
pipe 30 and thepipe 34 connected to thepipe 30 are connected to the upper part of theelectrolytic cell 12 and thestorage tank 18. Thepipes electrolytic cell 12 and thestorage tank 18 together. Thepipes electrolytic solution 80 including a gas bubbles 84 of oxygen generated from theelectrolytic solution 80 that has been electrolyzed by theelectrodes electrolytic cell 12 into thestorage tank 18. - The
pipe 36 connects thestorage tank 18 and an outside electrolyticsolution supply source 94 together. Theraw water pump 20 is provided to a middle part of thepipe 36. Theraw water pump 20 supplies theelectrolytic solution 80 from the electrolyticsolution supply source 94 to thestorage tank 18 through thepipe 36. - The
storage tank 18 stores therein theelectrolytic solution 80 that is supplied from the outside electrolyticsolution supply source 94 and that is supplied to theelectrolytic cell 12. Thestorage tank 18 is provided between thepipes storage tank 18 stores therein theelectrolytic solution 80 including the gas bubbles 84 of oxygen that has been sent from theelectrolytic cell 12 through thepipes - The
pipe 38 connects thestorage tank 18 and a lower part of theelectrolytic cell 12 together. Thepipe 38 supplies theelectrolytic solution 80 of thestorage tank 18 to the lower part of theelectrolytic cell 12. Thepipe 38 causes theelectrolytic solution 80 including the gas bubbles 84 of oxygen that has been sent from theelectrolytic cell 12 to thestorage tank 18 by thepipes electrolytic cell 12. In other words, thepipes electrolytic cell 12, and function as a circulation pipe that causes oxygen generated from theelectrolytic solution 80 that has been electrolyzed in theelectrolytic cell 12 to flow into theelectrolytic cell 12. - The
circulation pump 22 is an example of a circulation member and a supply unit, and is provided to a middle part of thepipe 38 that is a part of the circulation pipe. Thecirculation pump 22 applies pressure to theelectrolytic solution 80 including oxygen that flows in thepipe 38, and causes theelectrolytic solution 80 to flow into theelectrolytic cell 12. It is preferable that thecirculation pump 22 supply theelectrolytic solution 80 to theelectrolytic cell 12 with pressure equal to or greater than atmospheric pressure. - The
pipe 40 is an example of an exhaust pipe, and is connected to the upper part of thestorage tank 18. Thevalve 28 is provided to a middle part of thepipe 40. Thepipe 40 exhausts, in agas layer 86 where the gas bubbles 84 of oxygen generated at theelectrode 16 of theelectrolytic cell 12 is separated into gas and liquid, a part from the upper part of thestorage tank 18. Thevalve 28 adjusts an exhaust gas amount of thegas layer 86 so that circulation pressure of theelectrolytic solution 80 can be maintained equal to or greater than atmospheric pressure. - The following describes operation of the
device 10 for generating hydrogen peroxide according to the first embodiment. - In the
device 10 for generating hydrogen peroxide, theDC power source 90 applies a DC voltage to theelectrodes electrodes electrolytic solution 80 in theelectrolytic cell 12. In electrolysis of water as theelectrolytic solution 80 that has been caused by theelectrodes -
(Cathode) 4H2O+4e −+O2->2H2O+4OH− (First reaction) -
(Anode) 2H2O->O2+4H++4e − (Second reaction) - Furthermore, hydrogen peroxide is secondarily generated by oxidation action of H2O of the OH− radicals generated on the
electrode 14 side. - On the
electrode 14 side, as the dissolved oxygen concentration of theelectrolytic solution 80 indicated on the left side of the first reaction is higher, the reaction is advanced to the right side in a chemical equilibrium manner. On theelectrode 16 side, oxygen is generated by the second reaction. Usually, on a surface of theelectrode 16, the oxygen concentration becomes supersaturated, and oxygen is discharged as the gas bubbles 84. A part of the gas bubbles 84 is slowly dissolved in theelectrolytic solution 80, but most of the remaining gas bubbles 84 are supplied from theelectrolytic cell 12 to thestorage tank 18 through thepipes - In this case, when the
electrolytic solution 80 that contacts atmosphere (=air) is supplied to theelectrolytic cell 12, atmospheric equilibrium causes the dissolved oxygen concentration of theelectrolytic solution 80 to be made about 20%, which is almost the same as that of oxygen partial pressure. By contrast, thedevice 10 for generating hydrogen peroxide according to the embodiment circulates theelectrolytic solution 80 with the gas bubbles 84 through thestorage tank 18 and the like, and returns theelectrolytic solution 80 to theelectrolytic cell 12. In this manner, thedevice 10 for generating hydrogen peroxide increases the dissolved oxygen concentration of theelectrolytic solution 80 in theelectrolytic cell 12. - In addition, the
device 10 for generating hydrogen peroxide has retention time of theelectrolytic solution 80 including the gas bubbles 84 elongated by providing thestorage tank 18 to a middle part of the circulation path of theelectrolytic solution 80. In this manner, the gas bubbles 84 are further dissolved in theelectrolytic solution 80. Nitrogen dissolved in theelectrolytic solution 80 that has been supplied from the electrolyticsolution supply source 94 to thestorage tank 18 is exhausted based on Charles's law by dissolving the gas bubbles 84 in theelectrolytic solution 80. Thus, the dissolved oxygen concentration in theelectrolytic solution 80 is increased for partial pressure of the gas bubbles 84 from oxygen generated by theelectrode 16. - Exhausted nitrogen and oxygen that is not dissolved in the
electrolytic solution 80 are separated from theelectrolytic solution 80, and become thegas layer 86 on the upper part of thestorage tank 18. Thevalve 28 exhausts a part of thegas layer 86 while adjusting an exhaust gas amount so that circulation pressure of theelectrolytic solution 80 can be maintained equal to or greater than atmospheric pressure. - The
valve 26 discharges theelectrolytic solution 80 having higher concentration of hydrogen peroxide water as thehydrogen peroxide water 88 to the outside while adjusting a discharge amount so that circulation pressure of theelectrolytic solution 80 can be maintained equal to or greater than atmospheric pressure. - At the
electrode 14 functioning as a cathode, inorganic ions such as calcium that are dissolved in theelectrolytic solution 80 are secondarily generated as side reaction by the following third reaction. The generated inorganic ions cause deterioration in theelectrode 14. -
(Cathode) Ca2++2e −->Ca (Third reaction) - In the
device 10 for generating hydrogen peroxide, when theelectrodes electrodes electrode 16 is connected to a negative electrode of theDC power source 90, and theelectrode 14 is connected to a positive electrode of theDC power source 90. In this manner, theelectrode 16 functions as a cathode, and theelectrode 14 functions as an anode. Thedevice 10 for generating hydrogen peroxide dissolves, as indicated in fourth reaction, inorganic ions such as calcium that have been deposited on theelectrode 14 functions as an anode in theelectrolytic solution 80, and discharges the dissolved inorganic ions with theelectrolytic solution 80 to the outside. After that, theelectrode 14 functioning as an anode advances the second reaction and generates oxygen, and theelectrode 16 functioning as a cathode generates the first reaction. In this manner, thedevice 10 for generating hydrogen peroxide can advance the above-mentioned reaction while regenerating theelectrode 14 the polarity of which has been reversed from a cathode to an anode and extending life thereof. -
(Anode: Immediately after polarity reverse) Ca->Ca2++2e − (Fourth reaction) - As described above, the
device 10 for generating hydrogen peroxide according to the first embodiment includes thepipes electrolytic solution 80 to flow from theelectrolytic cell 12 into thestorage tank 18. Thedevice 10 for generating hydrogen peroxide causes theelectrolytic solution 80 including many of the gas bubbles 84 of oxygen that has been electrolyzed in theelectrolytic cell 12 by theelectrodes electrolytic cell 12 into thestorage tank 18 and theelectrolytic solution 80 to be circulated so as to increase the dissolved oxygen concentration of theelectrolytic solution 80 in thestorage tank 18. Thedevice 10 for generating hydrogen peroxide can supply theelectrolytic solution 80 having high dissolved oxygen concentration to theelectrolytic cell 12, so as to advance the first reaction to the right and increase concentration of hydrogen peroxide. For example, thedevice 10 for generating hydrogen peroxide can generate thehydrogen peroxide water 88 having concentration from several 10 ppm to several 100 ppm. - The
device 10 for generating hydrogen peroxide includes thestorage tank 18. Thedevice 10 for generating hydrogen peroxide can store theelectrolytic solution 80 flowing from theelectrolytic cell 12 into thestorage tank 18, dissolve the gas bubbles 84 of oxygen in theelectrolytic solution 80, and increase the dissolved oxygen concentration. Thus, thedevice 10 for generating hydrogen peroxide can advance the first reaction to the right, and generate thehydrogen peroxide water 88 in higher concentration. - The
device 10 for generating hydrogen peroxide includes thecirculation pump 22, and can maintain pressure of theelectrolytic solution 80 flowing in thepipe 38 equal to or greater than atmospheric pressure. Thus, thedevice 10 for generating hydrogen peroxide can increase the dissolved oxygen concentration in theelectrolytic solution 80. - The
device 10 for generating hydrogen peroxide includes thepipe 40 that is connected to the upper part of thestorage tank 18 and thevalve 28. Thedevice 10 for generating hydrogen peroxide can exhaust thegas layer 86 on the upper part of thestorage tank 18 through thepipe 40 and thevalve 28 while maintaining pressure applied to theelectrolytic solution 80 that has been stored in thestorage tank 18 equal to or greater than atmospheric pressure. Thus, thedevice 10 for generating hydrogen peroxide can increase dissolved oxygen concentration in theelectrolytic solution 80. - The
device 10 for generating hydrogen peroxide includes thepipe 30 connected to the upper part of theelectrolytic cell 12, thepipe 32, and thevalve 26. Thedevice 10 for generating hydrogen peroxide can discharge the electrolytic solution 80 (or the hydrogen peroxide water 88) of theelectrolytic cell 12 through thepipes valve 26 while maintaining pressure applied to theelectrolytic solution 80 of theelectrolytic cell 12 equal to or greater than atmospheric pressure. -
FIG. 2 is a view illustrating the whole configuration of adevice 110 for generating hydrogen peroxide according to a second embodiment. Thedevice 110 for generating hydrogen peroxide includes theelectrolytic cell 12, theelectrodes liquid separation tank 118, araw water pump 120, acompressor 122,valves pipes diffuser tube 142. Thepipes - The
pipe 132 connects a lower part of the gas-liquid separation tank 118 and theoutside holding unit 92. Thevalve 126 is provided to a middle part of thepipe 132. Thepipe 132 discharges the electrolyzedelectrolytic solution 80 as thehydrogen peroxide water 88 from the upper part of theelectrolytic cell 12 to the holdingunit 92. Thevalve 126 adjusts a discharge amount of thehydrogen peroxide water 88 so that pressure of the dischargedelectrolytic solution 80 can be made equal to or greater than atmospheric pressure. - The
pipe 134 connects the upper part of theelectrolytic cell 12 and the gas-liquid separation tank 118. The 134 causes theelectrolytic solution 80 including the gas bubbles 84 of oxygen that has been electrolyzed by theelectrodes electrolytic cell 12 into the gas-liquid separation tank 118. - The gas-
liquid separation tank 118 is provided between thepipes liquid separation tank 118 holds theelectrolytic solution 80 that has been electrolyzed in theelectrolytic cell 12 with the gas bubbles 84 of oxygen. The gas-liquid separation tank 118 separates theelectrolytic solution 80 into aliquid phase 180 that is discharged as thehydrogen peroxide water 88 and agas layer 186 including oxygen that has been generated at theelectrode 16 of theelectrolytic cell 12. - The
pipe 130 is connected to an upper part of the gas-liquid separation tank 118. Thepipe 140 is connected to a middle part of thepipe 130. In other words, thepipe 140 is an example of a branch pipe, and branches from thepipe 130 that is a part of the circulation pipe. Thepipe 140 is connected to the outside, and exhausts thegas layer 186 in the gas-liquid separation tank 118. Thevalve 128 is provided to a middle part of thepipe 140. Thepipes gas layer 186 that has been separated into gas and liquid from the upper part of the gas-liquid separation tank 118. Thevalve 128 adjusts an exhaust gas amount of thegas layer 186 so that circulation pressure of theelectrolytic solution 80 can be maintained equal to or greater than atmospheric pressure. - The
pipe 136 connects theelectrolytic cell 12 and the outside electrolyticsolution supply source 94 together. Theraw water pump 120 is provided to a middle part of thepipe 136. Theraw water pump 120 is an example of a supply unit, and directly supplies theelectrolytic solution 80 from the electrolyticsolution supply source 94 to the gas-liquid separation tank 118 through thepipe 136. It is preferable that theraw water pump 120 supply theelectrolytic solution 80 to theelectrolytic cell 12 with pressure equal to or greater than atmospheric pressure. - The
pipe 130 and thepipe 138 connected to a middle part of thepipe 130 connect the upper part of the gas-liquid separation tank 118 and theelectrolytic cell 12. Thepipe 138 is connected to the lower part of theelectrolytic cell 12 at a lower part than thediffuser tube 142. Thepipes gas layer 186 on the upper part of the gas-liquid separation tank 118 to flow into theelectrolytic cell 12. - The
compressor 122 is an example of a circulation member, and is provided to a middle part of thepipe 138 that is a part of the circulation pipe. Thecompressor 122 applies pressure to gas of thegas layer 186 including oxygen of the gas-liquid separation tank 118 that flows in thepipes gas layer 186 to flow from the gas-liquid separation tank 118 into theelectrolytic cell 12. - The
diffuser tube 142 is an air diffuser that has, for example, a round shape, a plate shape, and the other shape. Thediffuser tube 142 is provided to a lower part of theelectrolytic cell 12. Thediffuser tube 142 disperses, through thepipes liquid separation tank 118, gas of thegas layer 186 including oxygen that flows into theelectrolytic cell 12 in theelectrolytic cell 12, and diffuses the dispersed gas as the gas bubbles 84. - The
device 110 for generating hydrogen peroxide according to the second embodiment causes thecompressor 122 to send gas of the oxygen-rich gas layer 186 that includes oxygen generated at theelectrode 16 and has been separated into gas and liquid at the gas-liquid separation tank 118 to theelectrolytic cell 12. Thedevice 110 for generating hydrogen peroxide can increase the dissolved oxygen concentration of theelectrolytic solution 80 in theelectrolytic cell 12, advance the first reaction to the right, and generate thehydrogen peroxide water 88 in higher concentration. - Specifically, the
device 110 for generating hydrogen peroxide having the sufficiently largeelectrolytic cell 12 and theelectrodes electrolytic cell 12, and has a contact time of theelectrode 14 with the gas bubbles 84 of oxygen elongated so as to dissolve the gas bubbles 84 having high oxygen concentration in theelectrolytic solution 80. Simply by sending gas including the gas bubbles 84 of oxygen in the gas-liquid separation tank 118 to theelectrolytic cell 12 as described above, this kind ofdevice 110 for generating hydrogen peroxide can generate thehydrogen peroxide water 88 having sufficiently high concentration, for example, from several 10 ppm to several 100 ppm. - In addition, the
device 110 for generating hydrogen peroxide includes thediffuser tube 142 that diffuses oxygen as gas bubbles 84 supplied to theelectrolytic cell 12 as the gas in theelectrolytic cell 12. Thedevice 110 for generating hydrogen peroxide can further enhance contact of the gas bubbles 84 with theelectrode 14, and can further improve the concentration of thehydrogen peroxide water 88. - Because the
valve 128 exhausts gas of thegas layer 186 while adjusting an exhaust gas amount and pressure through thepipes electrolytic solution 80 that has been supplied from the outside electrolyticsolution supply source 94 to theelectrolytic cell 12 can be easily exhausted from thegas layer 186 in the gas-liquid separation tank 118. Similarly to thedevice 10 for generating hydrogen peroxide according to the first embodiment, thedevice 110 for generating hydrogen peroxide can further advance the first reaction to the right with chemical equilibrium, and can improve the concentration of generated hydrogen peroxide water. - Other effects according to the second embodiment are almost the same as those of the first embodiment.
- The following describes an experiment for proving effects of the embodiments described as above.
-
FIG. 3 is a view illustrating the whole configuration of adevice 210 for generating hydrogen peroxide according to a first comparison example.FIG. 4 is a view illustrating the whole configuration of adevice 310 for generating hydrogen peroxide according to a second comparison example. The following describes thedevice 210 for generating hydrogen peroxide according to the first comparison example and thedevice 310 for generating hydrogen peroxide according to the second comparison example as compared with the embodiments. - In the
device 210 for generating hydrogen peroxide according to the first comparison example, anelectrolytic solution 280 is supplied by araw water pump 220 from the outside to anelectrolytic cell 212 through apipe 236. Anelectrode 214 is connected to a negative electrode of aDC power source 290, and functions as a cathode. Theelectrode 216 is connected to a positive electrode of theDC power source 290, and functions as an anode. When theDC power source 290 applies a voltage to theelectrodes electrodes electrolytic solution 280.Hydrogen peroxide water 288 with oxygen generated at theelectrode 216 is discharged to the outside through apipe 232. Because oxygen is discharged together with thehydrogen peroxide water 288, theelectrode 214 cannot obtain a sufficient contact time with oxygen. Due to chemical equilibrium of atmospheric contact of the suppliedelectrolytic solution 280 and oxygen partial pressure of air, thedevice 210 for generating hydrogen peroxide cannot advance the first chemical reaction to the right in a chemical equilibrium manner and increase the concentration of thehydrogen peroxide water 288. - When the
electrode 216 functioning as an anode is formed of an inexpensive material such as SUS, a surface of theelectrode 216 is flat, the electrode area is smaller, and activity generating hydrogen peroxide water is reduced. Thus, the concentration of hydrogen peroxide water cannot be increased by reversing the polarity of theelectrodes - The
device 310 for generating hydrogen peroxide according to the second comparison example further includes adiffuser tube 342 provided to a lower part of theelectrolytic cell 212, apipe 338 connected to a supply source of oxygen, and acompressor 322 provided to a middle part of thepipe 338. - In the
device 310 for generating hydrogen peroxide, thecompressor 322 supplies oxygen to theelectrolytic cell 212 at a lower part than thediffuser tube 342 through thepipe 236. As compared with thedevice 210 for generating hydrogen peroxide, thedevice 310 for generating hydrogen peroxide can increase the dissolved oxygen concentration of theelectrolytic solution 280 in theelectrolytic cell 212. However, in thedevice 310 for generating hydrogen peroxide, oxygen that cannot be dissolved in theelectrolytic solution 280 supplied from the outside and oxygen generated at theelectrode 216 are discharged with thehydrogen peroxide water 288. Thus, in thedevice 310 for generating hydrogen peroxide, even though effective use of oxygen cannot be sufficiently made, cost is increased in order to install a device for generating oxygen for supplying oxygen or a device for supplying oxygen such as an oxygen tank. - The
device 10 for generating hydrogen peroxide according to first embodiment is defined as a first embodiment example, and thedevice 110 for generating hydrogen peroxide is defined as a second embodiment example. - Conditions of the experiment are as follows:
- Voltage of DC power supply applied to electrodes: 10 V
- Current flowing into electrodes: 100 mA
- Conductive time: 60 minutes
- Electrolytic solution: Tap water
- A Pt (platinum) plate is used as the
electrode 216 functioning as an anode according to the first and second comparison examples. A carbon electrode is used as theelectrode 16 functioning as an anode according to the first and second embodiment examples. Carbon electrodes are used as theelectrodes electrodes electrodes electrodes - After the experiment is made based on these conditions, the concentration of generated hydrogen peroxide water is measured using a pack test from the potassium iodide method.
FIG. 5 is the experiment results of the concentration of generated hydrogen peroxide water according to the embodiment examples and comparison examples. - As illustrated in
FIG. 5 , when the first embodiment example and first comparison example where oxygen is not supplied are compared with each other, it turns out that hydrogen peroxide water in high concentration can be generated in the first embodiment example as compared with the first comparison example. When the second embodiment example and second comparison example where oxygen is supplied and diffused are compared with each other, it turns out that hydrogen peroxide water in high concentration can be generated in the second embodiment example as compared with the second comparison example. Specifically, in the case where oxygen is supplied, it turns out that a difference in the concentration of generated hydrogen peroxide water is larger. -
FIG. 5 illustrates that hydrogen peroxide water in high concentration can be generated in the first and second embodiment examples where carbon electrodes are used as theelectrodes electrode 216 and a carbon electrode is used as theelectrode 214. - In addition, when a DC current is defined as 400 mA and the conditions other than the DC current are defined as above, in the second embodiment example where oxygen is diffused and carbon electrodes are used as the
electrodes - The shape, the number, the disposition, the connection relation, and the like of the embodiments described above may be modified as appropriate. Each of the embodiments may be combined with each other.
- For example, the
diffuser tube 142 in the second embodiment may be provided to the first embodiment. - The embodiments according to the present invention have been described, but these embodiments have been presented by way of example only and are not intended to limit the scope of the invention. These new embodiments may be embodied in a variety of other forms, and various omissions, substitutions, and changes may be made without departing from the spirit of the invention. The accompanying claims and their equivalents are intended to cover such forms or modifications as would fall within the scope and spirit of the invention.
Claims (11)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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JP2015247552A JP6636790B2 (en) | 2015-12-18 | 2015-12-18 | Hydrogen peroxide generator |
JP2015-247552 | 2015-12-18 | ||
PCT/JP2016/077737 WO2017104203A1 (en) | 2015-12-18 | 2016-09-20 | Device for generating hydrogen peroxide |
Publications (1)
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US20180371628A1 true US20180371628A1 (en) | 2018-12-27 |
Family
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Family Applications (1)
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US16/062,534 Abandoned US20180371628A1 (en) | 2015-12-18 | 2016-09-20 | Device for generating hydrogen peroxide |
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US (1) | US20180371628A1 (en) |
JP (1) | JP6636790B2 (en) |
CN (1) | CN108474123B (en) |
AU (1) | AU2016370898B2 (en) |
CA (1) | CA3008590A1 (en) |
SG (1) | SG11201805108UA (en) |
WO (1) | WO2017104203A1 (en) |
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KR101910636B1 (en) * | 2017-12-19 | 2018-10-24 | (주) 테크로스 | Device for producing hydrogen peroxide using electrolysis |
CN113957460A (en) * | 2021-10-27 | 2022-01-21 | 国红环保科技有限责任公司 | Method for synthesizing hydrogen peroxide based on alternating current electrolysis, device and application thereof |
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US20070012578A1 (en) * | 2005-06-30 | 2007-01-18 | Akzo Nobel N.V. | Chemical process |
JP2008063648A (en) * | 2006-09-11 | 2008-03-21 | Sumitomo Heavy Ind Ltd | Apparatus for producing rinse water containing hydrogen peroxide, and method for producing rinse water containing hydrogen peroxide |
US20080110766A1 (en) * | 2006-06-16 | 2008-05-15 | Kabushiki Kaisha Toshiba | Cleaning system and cleaning method |
US20100187128A1 (en) * | 2007-04-12 | 2010-07-29 | Joachim Neubert | Method and device for treating liquids, using an electrolytic stage |
US20120298521A1 (en) * | 2011-05-26 | 2012-11-29 | David Thomas Richardson | Electrolyte supply tanks and bubbler tanks having improved gas diffusion properties for use in electrolyzer units |
US20140131217A1 (en) * | 2011-05-31 | 2014-05-15 | Clean Chemistry, Llc | Electrochemical reactor and process |
US20140174942A1 (en) * | 2011-04-15 | 2014-06-26 | Advanced Diamond Technologies, Inc. | Electrochemical System and Method for On-Site Generation of Oxidants at High Current Density |
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JP3080865B2 (en) * | 1995-06-26 | 2000-08-28 | 神鋼パンテツク株式会社 | Hydrogen / oxygen generator |
JP2000061471A (en) * | 1998-08-18 | 2000-02-29 | Gifu Prefecture | Water purifying method and purifier |
JP2002330665A (en) * | 2001-05-07 | 2002-11-19 | Nippon Oil Corp | Method for cleaning water in water tank and apparatus therefor |
JP2005296922A (en) * | 2004-03-19 | 2005-10-27 | Sekisui Chem Co Ltd | Sterilizing system of rainwater |
JP2010018840A (en) * | 2008-07-10 | 2010-01-28 | Teijin Pharma Ltd | Method for removing water in electrolyte, device therefor and water content measurement apparatus |
JP2012001745A (en) * | 2010-06-14 | 2012-01-05 | Toshiba Corp | Apparatus and method for electrolysis |
-
2015
- 2015-12-18 JP JP2015247552A patent/JP6636790B2/en active Active
-
2016
- 2016-09-20 WO PCT/JP2016/077737 patent/WO2017104203A1/en active Application Filing
- 2016-09-20 CA CA3008590A patent/CA3008590A1/en not_active Abandoned
- 2016-09-20 US US16/062,534 patent/US20180371628A1/en not_active Abandoned
- 2016-09-20 CN CN201680074711.0A patent/CN108474123B/en active Active
- 2016-09-20 SG SG11201805108UA patent/SG11201805108UA/en unknown
- 2016-09-20 AU AU2016370898A patent/AU2016370898B2/en active Active
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US5358609A (en) * | 1992-12-04 | 1994-10-25 | Chemetics International Company Ltd. | Electrolytic production of hydrogen peroxide using bipolar membranes |
US20070012578A1 (en) * | 2005-06-30 | 2007-01-18 | Akzo Nobel N.V. | Chemical process |
US20080110766A1 (en) * | 2006-06-16 | 2008-05-15 | Kabushiki Kaisha Toshiba | Cleaning system and cleaning method |
JP2008063648A (en) * | 2006-09-11 | 2008-03-21 | Sumitomo Heavy Ind Ltd | Apparatus for producing rinse water containing hydrogen peroxide, and method for producing rinse water containing hydrogen peroxide |
US20100187128A1 (en) * | 2007-04-12 | 2010-07-29 | Joachim Neubert | Method and device for treating liquids, using an electrolytic stage |
US20140174942A1 (en) * | 2011-04-15 | 2014-06-26 | Advanced Diamond Technologies, Inc. | Electrochemical System and Method for On-Site Generation of Oxidants at High Current Density |
US20120298521A1 (en) * | 2011-05-26 | 2012-11-29 | David Thomas Richardson | Electrolyte supply tanks and bubbler tanks having improved gas diffusion properties for use in electrolyzer units |
US20140131217A1 (en) * | 2011-05-31 | 2014-05-15 | Clean Chemistry, Llc | Electrochemical reactor and process |
Also Published As
Publication number | Publication date |
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JP6636790B2 (en) | 2020-01-29 |
CA3008590A1 (en) | 2017-06-22 |
CN108474123A (en) | 2018-08-31 |
SG11201805108UA (en) | 2018-07-30 |
AU2016370898B2 (en) | 2019-10-10 |
WO2017104203A1 (en) | 2017-06-22 |
CN108474123B (en) | 2020-09-01 |
AU2016370898A1 (en) | 2018-07-05 |
JP2017110279A (en) | 2017-06-22 |
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