Water electrolysis system including hydrogen removal device and oxygen removal device

Abstract

The present invention relates to a water electrolysis system comprising: a hydrogen (H2) removal device; and an oxygen (O2) removal device, wherein the hydrogen (H2) removal device removes, from an oxygen (O2) stream, hydrogen (H2), and the oxygen (O2) removal device removes, from a hydrogen (H2) stream, oxygen (O2). By removing hydrogen (H2) and oxygen (O2) from the respective gas streams, the likelihood of explosion accidents during the movement of the gas streams is remarkably reduced, and the purity requirements of various industrial gases can be satisfied without a separate purification process.

Description

Water electrolysis system including hydrogen removal device and oxygen removal device

[0001] The present invention relates to a water electrolysis system including a hydrogen removal device and an oxygen removal device.

[0002] Recently, with the potential depletion of fossil fuels, the most popular energy source on Earth, and the growing concern over environmental pollution, research is being conducted in various fields to produce green hydrogen by combining renewable energy sources and the water electrolysis process as an alternative energy source.

[0003] However, most renewable energy sources are irregular and have low load power, so the purity of the hydrogen ultimately produced is low and it is easily mixed with oxygen, which can lead to explosion limits.

[0004] In addition, since hydrogen in the oxygen stream generated from the electrolysis process lowers the purity and increases the possibility of ignition and explosion, a method to improve the purity of each of the reaction products, hydrogen and oxygen, is essential to ensure the safety of the electrolysis system.

[0005] Therefore, the present invention seeks to improve the stability of a water electrolysis system by removing oxygen in a hydrogen stream and hydrogen in an oxygen stream.

[0006] In order to solve the above problems, the present invention aims to provide a water electrolysis system including a hydrogen removal device and an oxygen removal device.

[0007] The present invention relates to a water electrolysis system including a water electrolysis device; a hydrogen (H2) removal device; and an oxygen (O2) removal device; wherein the water electrolysis device may include an oxidation electrode (Anode) and a reduction electrode (Cathode).

[0008] The above hydrogen (H2) removal device may remove hydrogen (H2) from an oxygen (O2) stream generated from an oxidation electrode (Anode) of the water electrolysis device, and the above oxygen (O2) removal device may remove oxygen (O2) from a hydrogen (H2) stream generated from a reduction electrode (Cathode) of the water electrolysis device.

[0009] The above hydrogen (H2) removal device and oxygen (O2) removal device may each include a catalyst.

[0010] The above catalyst may be composed of a catalyst metal and a carrier.

[0011] The above catalyst metal may be at least one selected from palladium (Pd), platinum (Pt), nickel (Ni), silver (Ag), gold (Au), manganese (Mn), iron (Fe), cobalt (Co), zinc (Zn), ruthenium (Ru), rhodium (Rh), osmium (Os), iridium (Ir), lutetium (Lu), gallium (Ga), indium (In), bismuth (Bi), molybdenum (Mo), gadolinium (Gd), titanium (Ti), and copper (Cu).

[0012] The above carrier may be at least one selected from the group consisting of oxides of aluminum (Al), cerium (Ce), manganese (Mn), indium (In), iridium (Ir), gallium (Ga), thallium (Tl), zinc (Zn), titanium (Ti), and yttrium (Y).

[0013] The content of the catalyst metal in the above catalyst may be 0.01 to 30 wt%.

[0014] The above hydrogen (H2) removal device may remove 99% or more of hydrogen (H2) molecules from the oxygen (O2) stream.

[0015] The above oxygen (O2) removal device may remove 99.99% or more of oxygen (O2) molecules from the hydrogen (H2) stream.

[0016] In the above hydrogen (H2) removal device, hydrogen (H2) molecules may be removed from the oxygen (O2) stream within 3 hours.

[0017] In the above oxygen (O2) removal device, oxygen (O2) molecules may be removed from the hydrogen (H2) stream within 3 hours.

[0018] The above hydrogen (H2) removal device and oxygen (O2) removal device may include a catalytic reactor; a moisture adsorber; and a wool member.

[0019] The above electrolysis system may include a hydrogen (H2) removal module comprising a plurality of hydrogen (H2) removal devices; and an oxygen (O2) removal module comprising a plurality of oxygen (O2) removal devices.

[0020] The above electrolysis system may have a plurality of hydrogen (H2) removal devices and oxygen (O2) removal devices, and while one of the hydrogen (H2) removal devices and oxygen (O2) removal devices is operating, the remaining hydrogen (H2) removal devices and oxygen (O2) removal devices may perform a regeneration reaction of a catalyst.

[0021] The electrolysis system according to the present invention has the effect of improving stability by removing hydrogen (H2) and oxygen (O2) from the oxygen (O2) stream and hydrogen (H2) stream generated therefrom through a catalytic reaction, respectively, thereby increasing purity.

[0022] FIG. 1 is a graph showing the change in concentration of hydrogen (H2) over time when performing a catalytic reaction to remove hydrogen (H2) from an oxygen (O2) stream using an embodiment of the present invention.

[0023] FIG. 2 is a graph showing the change in concentration of hydrogen (H2) over time when performing a catalytic reaction to remove hydrogen (H2) from an oxygen (O2) stream using an embodiment of the present invention.

[0024] FIG. 3 is a graph showing the change in concentration of hydrogen (H2) over time when performing a catalytic reaction to remove hydrogen (H2) from an oxygen (O2) stream using an embodiment of the present invention.

[0025] FIG. 4 is a graph showing the change in concentration of hydrogen (H2) over time when performing a catalytic reaction to remove hydrogen (H2) from an oxygen (O2) stream using an embodiment of the present invention.

[0026] FIG. 5 is a graph showing the change in concentration of hydrogen (H2) over time when performing a catalytic reaction to remove hydrogen (H2) from an oxygen (O2) stream using an embodiment of the present invention.

[0027] FIG. 6 is a graph showing changes in the concentration of oxygen (O2) over time when performing a catalytic reaction to remove oxygen (O2) from a hydrogen (H2) stream using an embodiment of the present invention.

[0028] FIG. 7 is a graph showing the change in the concentration of oxygen (O2) over time when performing a catalytic reaction to remove oxygen (O2) from a hydrogen (H2) stream using an embodiment of the present invention.

[0029] FIG. 8 is a graph showing the change in the concentration of oxygen (O2) over time when performing a catalytic reaction to remove oxygen (O2) from a hydrogen (H2) stream using an embodiment of the present invention.

[0030] FIG. 9 is a graph showing the change in the concentration of oxygen (O2) over time when performing a catalytic reaction to remove oxygen (O2) from a hydrogen (H2) stream using an embodiment of the present invention.

[0031] FIG. 10 is a graph showing the change in the concentration of oxygen (O2) over time when performing a catalytic reaction to remove oxygen (O2) from a hydrogen (H2) stream using an embodiment of the present invention.

[0032] FIG. 1 is a graph showing the change in concentration of hydrogen (H2) over time when performing a catalytic reaction to remove hydrogen (H2) from an oxygen (O2) stream using an embodiment of the present invention.

[0033] FIG. 2 is a graph showing the change in concentration of hydrogen (H2) over time when performing a catalytic reaction to remove hydrogen (H2) from an oxygen (O2) stream using an embodiment of the present invention.

[0034] FIG. 3 is a graph showing the change in concentration of hydrogen (H2) over time when performing a catalytic reaction to remove hydrogen (H2) from an oxygen (O2) stream using an embodiment of the present invention.

[0035] FIG. 4 is a graph showing the change in concentration of hydrogen (H2) over time when performing a catalytic reaction to remove hydrogen (H2) from an oxygen (O2) stream using an embodiment of the present invention.

[0036] FIG. 5 is a graph showing the change in concentration of hydrogen (H2) over time when performing a catalytic reaction to remove hydrogen (H2) from an oxygen (O2) stream using an embodiment of the present invention.

[0037] FIG. 6 is a graph showing changes in the concentration of oxygen (O2) over time when performing a catalytic reaction to remove oxygen (O2) from a hydrogen (H2) stream using an embodiment of the present invention.

[0038] FIG. 7 is a graph showing the change in the concentration of oxygen (O2) over time when performing a catalytic reaction to remove oxygen (O2) from a hydrogen (H2) stream using an embodiment of the present invention.

[0039] FIG. 8 is a graph showing the change in the concentration of oxygen (O2) over time when performing a catalytic reaction to remove oxygen (O2) from a hydrogen (H2) stream using an embodiment of the present invention.

[0040] FIG. 9 is a graph showing the change in the concentration of oxygen (O2) over time when performing a catalytic reaction to remove oxygen (O2) from a hydrogen (H2) stream using an embodiment of the present invention.

[0041] FIG. 10 is a graph showing the change in the concentration of oxygen (O2) over time when performing a catalytic reaction to remove oxygen (O2) from a hydrogen (H2) stream using an embodiment of the present invention.

Claims

1. A water electrolysis system including a water electrolysis device; a hydrogen (H2) removal device; and an oxygen (O2) removal device; The above water electrolysis device includes an oxidation electrode (Anode) and a reduction electrode (Cathode), The above hydrogen (H2) removal device removes hydrogen (H2) from the oxygen (O2) stream generated from the oxidation electrode (Anode) of the water electrolysis device. The above oxygen (O2) removal device removes oxygen (O2) from the hydrogen (H2) stream generated from the reduction electrode (cathode) of the water electrolysis device. A water electrolysis system wherein the hydrogen (H2) removal device and the oxygen (O2) removal device each include a catalyst.

2. In paragraph 1, A water electrolysis system wherein the catalyst comprises a catalytic metal and a carrier.

3. In paragraph 2, A water electrolysis system wherein the above-mentioned catalyst metal is at least one selected from palladium (Pd), platinum (Pt), nickel (Ni), silver (Ag), gold (Au), manganese (Mn), iron (Fe), cobalt (Co), zinc (Zn), ruthenium (Ru), rhodium (Rh), osmium (Os), iridium (Ir), lutetium (Lu), gallium (Ga), indium (In), bismuth (Bi), molybdenum (Mo), gadolinium (Gd), titanium (Ti), and copper (Cu).

4. In paragraph 2, A water electrolysis system wherein the carrier is at least one selected from the group consisting of oxides of aluminum (Al), cerium (Ce), manganese (Mn), indium (In), iridium (Ir), gallium (Ga), thallium (Tl), zinc (Zn), titanium (Ti), and yttrium (Y).

5. In paragraph 2, A water electrolysis system wherein the content of the catalytic metal among the above catalysts is 0.1 to 3.0 wt%.

6. In paragraph 1, A water electrolysis system wherein the above hydrogen (H2) removal device removes 99% or more of hydrogen (H2) molecules from the oxygen (O2) stream.

7. In paragraph 1, A water electrolysis system wherein the above oxygen (O2) removal device removes 99% or more of oxygen (O2) molecules from the hydrogen (H2) stream.

8. In paragraph 1, A water electrolysis system in which hydrogen (H2) molecules are removed from the oxygen (O2) stream within 3 hours in the above hydrogen (H2) removal device.

9. In paragraph 1, A water electrolysis system in which oxygen (O2) molecules are removed from the hydrogen (H2) stream within 3 hours in the above oxygen (O2) removal device.

10. In paragraph 1, A water electrolysis system comprising a hydrogen (H2) removal device and an oxygen (O2) removal device, a catalytic reactor; a moisture adsorber; and a wool member.

11. In paragraph 1, A water electrolysis system comprising: a hydrogen (H2) removal module comprising a plurality of hydrogen (H2) removal devices; and an oxygen (O2) removal module comprising a plurality of oxygen (O2) removal devices.

12. In paragraph 1, The above water electrolysis system has a plurality of hydrogen (H2) removal devices and oxygen (O2) removal devices, A water electrolysis system characterized in that while one of the hydrogen (H2) removal device and the oxygen (O2) removal device is operating, the remaining hydrogen (H2) removal device and the oxygen (O2) removal device perform a regeneration reaction of a catalyst.

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