Three-chamber reactor for electrolyzing carbon dioxide

Abstract

When the three-chamber reactor is used, a cation exchange membrane assembly and an inert microporous membrane assembly are inserted into one side of an electrolysis carbon dioxide three-chamber reactor assembly in a jacking manner through a jacking fixing assembly; the interior of the electrolytic carbon dioxide three-chamber reactor is divided into an electrolytic carbon dioxide middle chamber, an electrolytic carbon dioxide cathode chamber and an electrolytic carbon dioxide anode chamber by a cation exchange membrane assembly and an inert microporous membrane assembly, and an anode electrolytic sheet assembly is inserted into one end of the electrolytic carbon dioxide three-chamber reactor assembly in a jacking manner through a jacking fixing assembly; the other end of the electrolysis carbon dioxide three-chamber reactor assembly is inserted with a cathode electrolysis sheet assembly in a jacking and pressing manner through a jacking and pressing fixing assembly, the end of a jacking and jacking contact head is pressed down through the running fit of a jacking and pressing end plate, a connecting rotating shaft plate and a pressing rotating shaft plate on a jacking and pressing fixing shaft lug plate, and the end of the jacking and jacking contact head is pressed down through the lifting and lowering of the pressing rotating shaft plate; and the pressing fixation and the pressing release of the pressing and tightening contact head are realized.

Description

technical field [0001] The invention belongs to the technical field of electrolysis of carbon dioxide, in particular to a three-chamber reactor for electrolysis of carbon dioxide. Background technique [0002] The electrochemical reactor is a special chemical reaction device that decomposes a redox chemical reaction into two reactions of cathodic electroreduction and anodic electrooxidation and unifies them together, according to the reactants, products or other media required to complete the electrochemical reaction Depending on the material state of the substance, electrochemical reactors can be divided into two types: those with fluid participating in the cathode and anode reactions and those without fluids participating in the cathode and anode reactions. For electrochemical reactions with fluid participation, the reactor generally has a cathode in structure Chamber and an anode chamber to complete the direct exchange of reactants, products or other media fluids with the...

AI Technical Summary

Problems solved by technology

[0003] The existing technology has the following problems: the carbon dioxide electroreduction technology that has gradually emerged in recent years to prepare formic acid or synthesis gas belongs to the situation of a cathode gas-liquid two-phase mixed feed, and the current carbon dioxide electroreduction technology widely uses two-chamber pool reactors. This seriously limits the further development and large-scale application of this technology. In order to suppress the hydrogen evolution side reaction, the electroreduction of carbon dioxide generally uses bicarbonate solution (or carbonate, the same below) to stabilize the cathode in the current state of the art. The pH environment required for the main reaction, but the solubility of carbon dioxide in this solution is small. In the case of a large-area electrode, if the cathode saturated solution is used for feeding, the problem of insufficient supply of carbon dioxide will easily occur. If the plug flow feeding method ( Gas-liquid alternation) is difficult to ensure the uniform distribution of the gas-liquid two-phase on the entire cathode area, obviously, in addition to the development of cathode single gas-phase feeding technology, the development of a new type of reactor to ensure the gas-liquid two-phase in the large-area electrode Uniform distribution on both is another option for the development of carbon dioxide electroreduction technology. In this regard, it is necessary to use a two-membrane three-chamber electrochemical reactor model to prepare formic acid, but the existing electrolysis of carbon dioxide uses the electrolytic anode sheet The installation, disassembly and replacement of electrolytic cathode sheets, cation exchange membranes, and inert microporous membranes are too complicated or directly fixed in one structure. This method delays the installation and damage replacement of the above-mentioned components. The pressure must be guaranteed to a safe value, and the lack of a convenient pressure relief structure will lead to unsafe use of the three-chamber reactor for electrolysis of carbon dioxide

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