CN116443815A - Circulation system and method for realizing carbon dioxide production by solar energy - Google Patents
Circulation system and method for realizing carbon dioxide production by solar energy Download PDFInfo
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- CN116443815A CN116443815A CN202310408864.6A CN202310408864A CN116443815A CN 116443815 A CN116443815 A CN 116443815A CN 202310408864 A CN202310408864 A CN 202310408864A CN 116443815 A CN116443815 A CN 116443815A
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 158
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 79
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 79
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 20
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 138
- 239000001257 hydrogen Substances 0.000 claims abstract description 78
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 78
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 59
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 34
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 claims abstract description 24
- 230000009467 reduction Effects 0.000 claims abstract description 24
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 17
- 238000005336 cracking Methods 0.000 claims abstract description 15
- 238000010248 power generation Methods 0.000 claims abstract description 9
- 150000002431 hydrogen Chemical class 0.000 claims description 44
- 239000003054 catalyst Substances 0.000 claims description 26
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 15
- 229910052759 nickel Inorganic materials 0.000 claims description 12
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 10
- 239000003792 electrolyte Substances 0.000 claims description 10
- 239000001301 oxygen Substances 0.000 claims description 10
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000000197 pyrolysis Methods 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 6
- 229910052797 bismuth Inorganic materials 0.000 claims description 6
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 6
- 229910017052 cobalt Inorganic materials 0.000 claims description 6
- 239000010941 cobalt Substances 0.000 claims description 6
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 229910052733 gallium Inorganic materials 0.000 claims description 6
- 229910052738 indium Inorganic materials 0.000 claims description 6
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 229910052749 magnesium Inorganic materials 0.000 claims description 6
- 239000011777 magnesium Substances 0.000 claims description 6
- 229910052697 platinum Inorganic materials 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 6
- JHJLBTNAGRQEKS-UHFFFAOYSA-M sodium bromide Chemical compound [Na+].[Br-] JHJLBTNAGRQEKS-UHFFFAOYSA-M 0.000 claims description 6
- 229910052718 tin Inorganic materials 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 2
- 238000004523 catalytic cracking Methods 0.000 claims 1
- 238000003860 storage Methods 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 8
- 239000000203 mixture Substances 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 239000003575 carbonaceous material Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 230000009849 deactivation Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- QUWBSOKSBWAQER-UHFFFAOYSA-N [C].O=C=O Chemical compound [C].O=C=O QUWBSOKSBWAQER-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/22—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of gaseous or liquid organic compounds
- C01B3/24—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of gaseous or liquid organic compounds of hydrocarbons
- C01B3/26—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of gaseous or liquid organic compounds of hydrocarbons using catalysts
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- C01B32/00—Carbon; Compounds thereof
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- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C1/00—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
- C07C1/02—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon from oxides of a carbon
- C07C1/12—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon from oxides of a carbon from carbon dioxide with hydrogen
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
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- 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
- C25B15/081—Supplying products to non-electrochemical reactors that are combined with the electrochemical cell, e.g. Sabatier reactor
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- 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
- C25B9/60—Constructional parts of cells
- C25B9/65—Means for supplying current; Electrode connections; Electric inter-cell connections
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- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/06—Integration with other chemical processes
- C01B2203/062—Hydrocarbon production, e.g. Fischer-Tropsch process
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- C01B2203/10—Catalysts for performing the hydrogen forming reactions
- C01B2203/1041—Composition of the catalyst
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- C01B2203/10—Catalysts for performing the hydrogen forming reactions
- C01B2203/1041—Composition of the catalyst
- C01B2203/1047—Group VIII metal catalysts
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- C01B2203/10—Catalysts for performing the hydrogen forming reactions
- C01B2203/1041—Composition of the catalyst
- C01B2203/1047—Group VIII metal catalysts
- C01B2203/1052—Nickel or cobalt catalysts
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- C01B2203/1041—Composition of the catalyst
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- C01B2203/1052—Nickel or cobalt catalysts
- C01B2203/1058—Nickel catalysts
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- C01B2203/12—Feeding the process for making hydrogen or synthesis gas
- C01B2203/1205—Composition of the feed
- C01B2203/1211—Organic compounds or organic mixtures used in the process for making hydrogen or synthesis gas
- C01B2203/1235—Hydrocarbons
- C01B2203/1241—Natural gas or methane
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Abstract
The invention relates to a circulating system and a circulating method for realizing carbon production of carbon dioxide by solar energy, comprising a solar power generation device 1, an electrolysis water device 2, a carbon dioxide reduction device 6 and a methane cracking device 9. The solar power generation device converts solar energy into electric energy and uses the electric energy to electrolyze water to prepare hydrogen. The carbon dioxide reduction unit converts carbon dioxide and hydrogen into methane and water, and the methane cracking unit converts methane into carbon products and hydrogen. The water and hydrogen generated by the whole system can be recycled. The invention provides a circulating system and a method for realizing carbon production of carbon dioxide by solar energy supply through designing and manufacturing a reaction system, hydrogen obtained by electrolysis of water is directly combined with carbon dioxide in air to obtain methane, the difficult problem of hydrogen storage and transportation is avoided, and the combination of high added value conversion of solar energy and carbon dioxide is realized. The invention can realize the high-efficiency and stable conversion and utilization of the carbon dioxide and has good application prospect.
Description
Technical Field
The invention relates to the technical field of carbon dioxide conversion and solar energy utilization, in particular to a circulating system and a method for realizing carbon dioxide production by solar energy supply.
Background
In recent years, the use of fossil fuels in large quantities has resulted in the emission of large amounts of carbon dioxide in the air, and carbon dioxide is currently the main greenhouse gas responsible for global warming, so that the global environmental problem caused by this has been widely paid attention to various countries. The chemical method is used for converting the carbon dioxide into methane and further into carbon products, so that the waste of the carbon dioxide can be changed into valuable, and the greenhouse effect generated by the carbon dioxide can be reduced.
Solar energy is used as a clean renewable energy source, the solar energy is converted into electric energy, and the generated electric energy is used for preparing hydrogen by electrolyzing water, so that an ideal green hydrogen preparation mode is realized. Since the c=o bond energy in carbon dioxide is very high and has strong stability in kinetics and thermodynamics, the direct conversion of carbon dioxide into carbon products requires high energy consumption. The reaction of carbon dioxide and hydrogen to generate methane has the advantages of high reaction speed and mild reaction conditions, and can also realize the on-site application of hydrogen production by water electrolysis, thereby avoiding the difficult problem of hydrogen storage and transportation, saving the cost, and having lower energy consumption and mild conditions in the same methane cracking reaction. Therefore, the carbon dioxide and the hydrogen generate methane, and the methane is converted into a carbon product through methane pyrolysis, so that the method has better application prospect.
The formation of methane and water vapor from carbon dioxide and hydrogen under the conditions of catalyst and heating is readily accomplished. In the methane cracking process, the coking and deactivation problems exist due to carbon deposition on the catalyst, so that the service performance of the catalyst is seriously influenced, and the industrial conversion and utilization of methane are not facilitated. The methane cracking problem described above can be well solved by using molten metal and molten salt as catalysts. The density of the carbon material is less than that of the melting medium, and the carbon material generated by the reaction can float on the upper surface of the melting medium, so that the catalyst can be prevented from coking and deactivation, and convenience can be brought to the collection of the carbon material. And after the reaction is finished, washing the collected carbon material with water, pickling and drying to obtain a carbon product.
Disclosure of Invention
In order to realize higher efficiency and environmental protection of carbon dioxide production, the invention aims to provide a circulating system and a circulating method for realizing carbon dioxide production by solar energy. The solar energy is used for generating electricity, the electric energy is used for carrying out water electrolysis to prepare green hydrogen, the hydrogen reacts with carbon dioxide to generate methane and water, the methane is catalytically cracked to generate carbon products and hydrogen, and the water and the hydrogen generated by the reaction can be recycled, so that the recycling process of carbon dioxide carbon production is realized.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a circulating system and a method for realizing carbon dioxide production by solar energy are characterized by comprising the following steps:
(1) A solar power generation device 1 for producing green hydrogen by electrolyzing water by collecting solar energy and converting the solar energy into electric energy;
(2) A hydrogen production system by electrolysis of water, which can decompose water into oxygen 3 and hydrogen 4 in the water electrolysis device 2;
(3) A carbon dioxide reduction system which can catalytically react carbon dioxide 5 and hydrogen 4 in a carbon dioxide reduction device 6 to produce water 7 and methane 8;
(4) A methane cracking system that can catalytically crack methane 8 in a methane cracker 9 to produce a carbon product 10 and hydrogen 11.
Further, the solar power generation device 1 is characterized in that solar light irradiates a solar panel to convert solar energy into electric energy, thereby providing energy for electrolyzing water.
The further water electrolysis device 2 is characterized in that water and electrolyte (such as sodium hydroxide, sulfuric acid and the like) are added into an electrolysis tank, a power supply is switched on, oxygen 3 is generated at an anode, hydrogen is generated at a cathode, and the hydrogen 4 is obtained after washing and drying.
A further carbon dioxide reduction device 6 is characterized in that carbon dioxide 5 and hydrogen 4 are introduced into the device according to a certain proportion, methane and steam can be generated by reaction under the conditions of heating and catalyst, and methane 8 is obtained after drying.
A further methane cracker 9 is characterized in that methane 8 is fed to the reactor at a flow rate of 20 to 100sccm and is cracked under heating and catalytic conditions to produce a carbon product 10 and hydrogen 11.
The further carbon dioxide reduction is carried out at a heating temperature of 200-500 ℃, and the catalyst adopts metals (nickel, bismuth, tin, gallium, iron, copper, indium, silver, cobalt, magnesium, platinum) and oxides (Al 2 O 3 、SiO 2 、CeO 2 、CuO、Fe 2 O 3 、BaO、MnO 2 ) The water 7 obtained by condensing the generated water vapor can be used as a raw material for electrolysis of water.
The further methane cracking heating temperature is 500-1000 ℃, and the catalyst adopts molten metal (nickel, bismuth, tin, gallium, iron, copper, indium, silver, cobalt, magnesium and platinum) and molten salt (KCl, naCl, mnCl) 2 、FeCl 3 、KBr、NaBr、CaCl 2 ) The hydrogen 11 produced by the reaction may be used for carbon dioxide reduction in combination of two or more of these.
The whole further process can realize the recycling of water and hydrogen.
Drawings
Fig. 1 is a circuit diagram of a circulation system and a method for realizing carbon dioxide production by solar energy.
Reference numerals in the drawings: 1. the solar energy power generation device, 2, the water electrolysis device, 3, oxygen, 4, hydrogen and 5.
Carbon dioxide, 6, carbon dioxide reduction unit, 7, water, 8, methane, 9, methane cracker, 10.
Carbon product, 11. Hydrogen.
Detailed Description
The circulating system and the method for producing carbon by carbon dioxide through solar energy are shown in fig. 1, the circulating system comprises a solar power generation device 1 for converting solar energy into electric energy, an electrolysis water device 2 for decomposing water into oxygen 3 and hydrogen 4, a carbon dioxide reduction device 6 for reacting carbon dioxide 5 with hydrogen 4 to generate methane 8 and water 7, and a methane cracking device 9 for cracking methane 8 into carbon products 10 and hydrogen 11, wherein the whole system realizes the combination of solar energy and high added value conversion of carbon dioxide.
The catalyst for reducing carbon dioxide in the patent of the invention adopts metal (nickel, bismuth, tin, gallium, iron, copper, indium, silver, cobalt, magnesium, platinum) and oxide (Al 2 O 3 、SiO 2 、CeO 2 、CuO、Fe 2 O 3 、BaO、MnO 2 ) A combination of two or more of the foregoing; the methane cracking catalyst adopts molten metal (nickel, bismuth, tin, gallium, iron, copper, indium, silver, cobalt, magnesium, platinum) and molten salt (KCl, naCl, mnCl) 2 、FeCl 3 、KBr、NaBr、CaCl 2 ) A combination of two or more of the foregoing.
The present invention will be described in further detail with reference to the following examples, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent, and the description thereof is merely illustrative of the present invention and not intended to be limiting.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: no such specific details are necessary to practice the invention. In other instances, well-known structures, materials, or methods have not been described in detail in order to avoid obscuring the present invention.
Throughout the specification, references to "one embodiment," "an embodiment," "one example," or "an example" mean: a particular feature, structure, or characteristic described in connection with the embodiment or example is included within at least one embodiment of the invention. Thus, the appearances of the phrases "in one embodiment," "in an example," or "in an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, or characteristics, may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Moreover, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and that the illustrations are not necessarily drawn to scale. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Specific example 1: the alkaline electrolyte and 99.99% carbon dioxide participate in the whole reaction system.
In this example, solar energy is converted into electric energy by using a solar cell panel, and is used for producing green hydrogen by electrolyzing water (alkaline). The hydrogen 4 reacts with 99.99% carbon dioxide 5 to obtain methane 8, and the methane 8 is cracked to obtain a carbon product 10 and hydrogen 11.
The catalyst of the present example carbon dioxide reduction and methane cracking is preferably a nickel-based metal mixture. Solar energy is converted into electric energy by using a solar panel. Water and alkaline electrolyte are added into the electrolytic tank, electricity is supplied to the anode and cathode of the electrolytic tank, hydrogen 4 is generated at the cathode of the electrolytic tank, and oxygen 3 is generated at the anode. The catalyst is added into the carbon dioxide reduction device 6 and heated, and the hydrogen 4 is dried and then is simultaneously introduced into the carbon dioxide reduction device 6 together with 99.99 percent of carbon dioxide 5, so that methane 8 and water 7 are generated under the action of thermocatalysis. Catalyst is added into the methane pyrolysis device 9 and heated, methane 8 is dried and then is introduced into the methane pyrolysis device 9, and carbon products 10 and hydrogen 11 are generated under the action of thermocatalysis. The water 7 and hydrogen 11 produced in the system can be recycled.
Specific example 2: the alkaline electrolyte and carbon dioxide in the air participate in the whole reaction system.
In this embodiment, solar cell panels are irradiated with sunlight to convert it into electrical energy, which is used to electrolyze water (alkaline) to produce hydrogen. The hydrogen 4 reacts with carbon dioxide 5 in the air to obtain methane 8, and the methane 8 is cracked to obtain a carbon product 10 and hydrogen 11.
This example uses the same catalyst as example 1, preferably a nickel-based metal mixture. The electrolyte used was the same as in example 1. Solar energy is converted into electric energy by using a solar panel. The electricity is communicated with the cathode and the anode of the electrolytic tank by leads, hydrogen 4 is generated at the cathode of the electrolytic tank, and oxygen 3 is generated at the anode. The nickel-based catalyst is added into a carbon dioxide reduction device 6 and heated, hydrogen 4 is dried and then compressed with carbon dioxide 5 in the air by a compression pump, and then the compressed hydrogen and the carbon dioxide 5 are simultaneously introduced into the carbon dioxide reduction device 6, and methane 8 and water 7 are generated under the action of thermal catalysis. The nickel-based catalyst is added into a methane cracking device 9 and heated, methane 8 is dried and then is introduced into the methane cracking device 9, and carbon products 10 and hydrogen 11 are generated under the action of thermal catalysis. The water 7 and hydrogen 11 produced in the system can be recycled.
Specific example 3: the acid electrolyte and 99.99% carbon dioxide participate in the whole reaction system.
In this example, solar energy is converted into electric energy by using a solar cell panel, and the electric energy is used for producing green hydrogen by electrolyzing water (acidity). The hydrogen 4 reacts with 99.99% carbon dioxide 5 to obtain methane 8, and the methane 8 is cracked to obtain a carbon product 10 and hydrogen 11.
This example uses the same catalyst as example 1, preferably a nickel-based metal mixture. Solar energy is converted into electric energy by using a solar panel. Water and acid electrolyte are added into the electrolytic tank, electricity is connected with the anode and cathode of the electrolytic tank by a lead, and the anode and cathode of the electrolytic tank respectively generate hydrogen 4 and oxygen 3. The catalyst is added into a carbon dioxide reduction device 6 and heated, and after the hydrogen 4 is dried, the hydrogen is mixed with 99.99 percent carbon dioxide 5 to obtain a mixture of the following components: 1 is introduced into a carbon dioxide reduction device 6, and methane 8 and water 7 are generated under the action of thermocatalysis. Catalyst is added into the methane pyrolysis device 9 and heated, methane 8 is dried and then is introduced into the methane pyrolysis device 9, and carbon products 10 and hydrogen 11 are generated under the action of thermocatalysis. The water 7 and hydrogen 11 produced in the system can be recycled.
Specific example 4: the acid electrolyte and carbon dioxide in the air participate in the whole reaction system.
In this example, solar energy is converted into electric energy by using a solar cell panel, and the electric energy is used for producing green hydrogen by electrolyzing water (acidity). The hydrogen 4 reacts with carbon dioxide 5 in the air to obtain methane 8, and the methane 8 is cracked to obtain a carbon product 10 and hydrogen 11.
This example uses the same catalyst as example 1, preferably a nickel-based metal mixture. The electrolyte used was the same as in example 3. Solar energy is converted into electric energy by using a solar panel. The electricity is supplied to the cathode and the anode of the electrolytic cell, hydrogen 4 is generated at the cathode of the electrolytic cell, and oxygen 3 is generated at the anode. The catalyst is added into a carbon dioxide reduction device 6 and heated, and the hydrogen 4 is dried and then mixed with the carbon dioxide 5 in the air to obtain a mixture of the hydrogen 4 and the carbon dioxide 5 in the air through 4:1 is introduced into a carbon dioxide reduction device 6, and methane 8 and water 7 are generated under the action of thermocatalysis. Catalyst is added into the methane pyrolysis device 9 and heated, methane 8 is dried and then is introduced into the methane pyrolysis device 9, and carbon products 10 and hydrogen 11 are generated under the action of thermocatalysis. The water 7 and hydrogen 11 produced in the system can be recycled.
The foregoing description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, which is defined broadly in the appended claims, and any person skilled in the art to which the invention pertains will readily appreciate that many modifications, including those that fall within the metes and bounds of the claims, or equivalence of such metes and bounds thereof.
Claims (6)
1. A circulating system and a method for realizing carbon dioxide production by solar energy are characterized by comprising the following steps:
(1) A solar power generation device 1 for producing green hydrogen by electrolyzing water by collecting solar energy and converting the solar energy into electric energy;
(2) A hydrogen production system by electrolysis of water, which can decompose water into oxygen 3 and hydrogen 4 in the water electrolysis device 2;
(3) A carbon dioxide reduction system which can catalytically react carbon dioxide 5 and hydrogen 4 in a carbon dioxide reduction device 6 to produce water 7 and methane 8;
(4) A methane cracking system that can catalytically crack methane 8 in a methane cracker 9 to produce a carbon product 10 and hydrogen 11.
2. The solar energy-powered circulation system and method for carbon dioxide production according to claim 1, wherein the system comprises a solar power generation device 1, an electrolyzed water device 2, a carbon dioxide reduction device 6 and a methane cracking device 9;
(1) The solar power generation device 1 is characterized in that solar light irradiates a solar cell panel to convert solar energy into electric energy, so as to provide energy for electrolysis of water;
(2) The water electrolysis device 2 is characterized in that water and electrolyte (such as sodium hydroxide, sulfuric acid and the like) are added into an electrolysis tank, a power supply is switched on, oxygen 3 is generated at an anode, hydrogen is generated at a cathode, and the hydrogen 4 is obtained after washing and drying;
(3) The carbon dioxide reduction device 6 is characterized in that carbon dioxide 5 and hydrogen 4 are led into the device according to a certain proportion, methane and water vapor can be generated by reaction under the conditions of heating and catalyst, and methane 8 is obtained after drying;
(4) The methane pyrolysis device 9 is characterized in that methane 8 is introduced into a reaction device at a flow rate of 20-100 sccm, and can be cracked under the conditions of heating and catalyst to generate a carbon product 10 and hydrogen 11.
3. The solar energy-powered circulation system and method for carbon dioxide production according to claim 2, wherein the heating temperature for carbon dioxide reduction is 200-500 ℃, and the catalyst is metal (nickel, bismuth, tin, gallium, iron, copper, indium, silver, cobalt, magnesium, platinum) and oxide (Al) 2 O 3 、SiO 2 、CeO 2 、CuO、Fe 2 O 3 、BaO、MnO 2 ) The water 7 obtained by condensing the generated water vapor can be used as a raw material for electrolysis of water.
4. The circulation system and the method for producing carbon dioxide by using solar energy according to claim 2, wherein the methane pyrolysis heating temperature is 500-1000 ℃, and the catalyst adopts molten metal (nickel, bismuth, tin, gallium, iron, copper, indium, silver, cobalt, magnesium and platinum) and molten salt (KCl, naCl, mnCl) 2 、FeCl 3 、KBr、NaBr、CaCl 2 ) The hydrogen 11 produced by the reaction may be used for carbon dioxide reduction in combination of two or more of these.
5. The solar energy-powered circulating system and method for producing carbon by carbon dioxide according to claim 2, wherein the whole process realizes the recycling of water and hydrogen.
6. A circulation system and method for carbon dioxide production using a solar energy source as defined in claim 1, the method comprising the steps of:
(1) Collecting solar energy and converting it into electrical energy;
(2) The electric energy is used for producing hydrogen by electrolyzing water;
(3) Carrying out a thermocatalytic reaction on the carbon dioxide and the dried hydrogen to generate methane and water;
(4) The dried methane is subjected to thermal catalytic cracking reaction to generate carbon products and hydrogen.
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| CN214990266U (en) * | 2021-04-23 | 2021-12-03 | 西南石油大学 | Device and system for preparing synthesis gas by utilizing solar energy to convert methane and carbon dioxide |
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| WO2012142996A2 (en) * | 2011-04-19 | 2012-10-26 | Werner Dietrich Karl | Water treatment for the electrolysis of water |
| CN112501632A (en) * | 2020-11-26 | 2021-03-16 | 北京星途探索科技有限公司 | Research of rail-controlled engine system based on solar water electrolysis |
| CN214990266U (en) * | 2021-04-23 | 2021-12-03 | 西南石油大学 | Device and system for preparing synthesis gas by utilizing solar energy to convert methane and carbon dioxide |
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