Electrolytic tank and application for electrochemical reduction reaction of carbon dioxide

Abstract

The invention discloses an electrolytic tank and application for an electrochemical reduction reaction of carbon dioxide. The electrolytic tank comprises a cathode chamber, an anode chamber and a gas-liquid separator, wherein the cathode chamber is divided into an upper cavity and a lower cavity; the lower cavity is a container with an open upper end, and the upper cavity is a container with an open lower end; the upper cavity is disposed above the lower cavity; first flange plates are disposed at the opening ends of the two cavities respectively; the two cavities are connected through the first flange plates. Compared with a traditional H-type electrolytic tank, the electrolytic tank can remarkably increase the converting rate of the carbon dioxide and improve electrochemical reaction speed and is easy to operate, and the calculation is convenient.

Description

technical field [0001] The invention belongs to the technical field of carbon dioxide electrochemical reduction, in particular to an electrolytic cell for electrochemical reduction of carbon dioxide. Background technique [0002] Electrochemical reduction of CO 2 (ERC) technology is the use of electricity to convert CO 2 Reduction to various organic chemicals to achieve CO 2 A technology for resource utilization. with other COs 2 Compared with the conversion technology, the outstanding advantage of the ERC technology is that water can be used as the hydrogen source for the reaction, and CO can be realized at normal temperature and pressure. 2 High-efficiency conversion, so there is no need for energy consumption caused by hydrogen production, heating, and pressurization required by chemical conversion technology, and the investment in equipment is small. [0003] Currently, in CO 2 The electrolytic cell used in the electrochemical research is a conventional H-type, as ...

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Problems solved by technology

[0005] Although the gas diffusion electrode can alleviate the mass transfer polarization to a certain extent, it is still affected by the CO 2 The limitation of low solubility in aqueous solution, and the hydrogen evolution side reaction will be intensified with the increase of the reaction area, so that the CO cannot be effectively improved. 2 conversion rate of

However, the use of organic solvents, including ionic liquids, as catholytes is not only expensive, but also some reagents are toxic and involve environmental issues, so they are not suitable for large-scale applications.

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