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Carbon dioxide electrolysis device and carbon dioxide electrolysis method
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A carbon dioxide and electrolysis technology, applied in the electrolysis process, electrolysis components, cells, etc., can solve the problems of toxic gases and complex chemical products, and achieve the effects of efficient storage, simplified gas management, and rational utilization.
Pending Publication Date: 2021-07-23
TSINGHUA UNIV
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Embodiment 1
[0032] First, in step S1, the Li 2 CO 3 、Na 2 CO 3 After the two carbonates were mixed in a molar ratio of 2:1, they were placed in an airtight container and dried at 150°C for 12 hours.
[0033] Next, in step S2, the electrolyte material prepared in step S1 is put into the electrolytic container for pre-electrolysis. At this time, the first electrolysis voltage was set to 0.8V, the first electrolysis time was 1 hour, and the first electrolysis temperature was 300°C. During pre-electrolysis, a constant and steady supply of carbon dioxide to the electrolysis vessel is always maintained.
[0034] Then, in step S3, enter the formal electrolysis. At this time, the second electrolysis voltage was set to 2V, the second electrolysis temperature was 300° C., and the carbon dioxide was continuously and stably supplied to the electrolysis container.
Embodiment 2
[0036] First, in step S1, the Li 2 CO 3 、K 2 CO 3 After the two carbonates were mixed in a molar ratio of 3:1, they were placed in an airtight container and dried at 250°C for 48 hours.
[0037] Next, in step S2, the electrolyte material prepared in step S1 is put into the electrolytic container for pre-electrolysis. At this time, the first electrolysis voltage was set to 2V, the first electrolysis time was 2 hours, and the first electrolysis temperature was 300°C. During pre-electrolysis, a constant and steady supply of carbon dioxide to the electrolysis vessel is always maintained.
[0038] Then, in step S3, enter the formal electrolysis. At this time, the second electrolysis voltage was set to 6V, and the second electrolysis temperature was set to 700° C., so that carbon dioxide was continuously and stably supplied to the electrolysis container.
Embodiment 3
[0040] First, in step S1, the Li 2 CO3, Na 2 CO 3 、K 2 After mixing the three CO3 carbonates according to the molar ratio of 4:3:3, they were placed in an airtight container and dried at 200°C for 48 hours.
[0041] Next, in step S2, the electrolyte material prepared in step S1 is put into the electrolytic container for pre-electrolysis. At this time, the first electrolysis voltage was set to 1.6V, the first electrolysis time was 2 hours, and the first electrolysis temperature was 500°C. During pre-electrolysis, a constant and steady supply of carbon dioxide to the electrolysis vessel is always maintained.
[0042] Then, in step S3, enter the formal electrolysis. At this time, the second electrolysis voltage is set to 4V, the second electrolysis temperature is 450° C., and the carbon dioxide is continuously and stably supplied to the electrolysis container.
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Abstract
The invention relates to the technical field of energy conservation, emission reduction and environmental protection, and provides a carbon dioxideelectrolysis device. The carbon dioxideelectrolysis device comprise an electrolytic vessel, a liquid metalcathode, a carbon dioxide introducer, a cathodecurrent collector, an anode, and a direct-current power supply; the liquid metalcathode arranged at the bottom in the electrolysis container; one end of the carbon dioxide introducer is arranged near the opening in the upper end of the electrolysis container, the other end of the carbon dioxide introducer extends into an electrolyte material arranged above the liquid metal cathode, and a channel for conveying carbon dioxide gas is arranged in the carbon dioxide introducer; one end of the cathode current collector is arranged near the opening in the upper end of the electrolysis container, and the other end of the cathode current collector extends into the liquid metal cathode; one end of the anode is arranged near the opening in the upper end of the electrolysis container, and the other end of the anode is positioned above the liquid metal cathode; and the anode terminal of the direct-current power supply is connected with the anode, and the cathode terminal of the direct-current power supply is connected with the cathode current collector. According to the structure, carbon dioxide can be directly electrolyzed into carbon and oxygen, gas management can be simplified, renewable energy sources can be stored more stably and efficiently in the form of carbon, and reasonable utilization of the renewable energy sources is achieved.
Description
technical field [0001] The invention relates to the technical field of energy saving, emission reduction and environmental protection, in particular to a carbon dioxide electrolysis device and a carbon dioxide electrolysis method for effectively electrolyzing carbon dioxide. Background technique [0002] In recent years, the extensive use of fossil energy by humans has increased the concentration of carbon dioxide in the atmosphere, aggravating the greenhouse effect, increasing global temperature, melting glaciers, rising sea levels, and gradually expanding deserts, bringing enormous environmental pressure to human society. my country strives to reach the peak of carbon emissions in 2030 and achieve carbon neutrality before 2060. At the same time, due to the limitation of fossil energy, the development and utilization of various forms of renewable energy such as solar energy and wind energy have become an inevitable choice for human beings to alleviate the energy crisis. Th...
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Application Information
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