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Application of AMP as electrolyte for electrochemical reduction of carbon dioxide

A technology of carbon dioxide and electrolyte, applied in electrolysis process, electrolysis components, etc., can solve the problems of solvent loss and increase process cost, etc., achieve the effect of promoting CO2 reduction, improving CO2 conversion efficiency, and promoting electrocatalytic reduction performance

Inactive Publication Date: 2021-10-01
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Chemical absorption of CO2 with amine solvents in CCS has been shown to be effective for CO2 capture, but this technology requires high energy for solvent regeneration, which not only increases the process cost, but also causes solvent loss

Method used

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  • Application of AMP as electrolyte for electrochemical reduction of carbon dioxide

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Experimental program
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Effect test

Embodiment 1

[0027] Such as figure 1 As shown, the application of AMP as an electrolyte for the electrochemical reduction of carbon dioxide, including 2-amino-2-methyl-propanol, cetyltrimethylammonium bromide, cetyldimethylammonium chloride, octadecane trimethylammonium chloride and dodecyldimethylamine oxide, the 2-amino-2-methyl-propanol is used as a water-based electrolyte, the cetyltrimethylammonium bromide, cetyl Alkyl dimethyl ammonium chloride, octadecyl trimethyl ammonium chloride, and dodecyl dimethyl ammonium oxide are sequentially used as catalytic surfactants for CO2 electrocatalytic reduction through chemical reactions.

[0028] The aqueous solution containing 1MAMP and 1% cetyltrimethylammonium bromide is used as the electrolyte solution, the silver electrode is used as the working electrode, the platinum sheet is used as the counter electrode, and the Ag / AgCl in 3M KCl solution is used as the reference electrode, washed with N2 for 15min, and then Introduce CO2 at room temp...

Embodiment 2

[0030] The aqueous solution containing 0.25MAMP and 2% hexadecyl dimethyl ammonium chloride was used as the electrolyte solution, the silver electrode was used as the working electrode, the platinum sheet was used as the counter electrode, and the Ag / AgCl in 3M KCl solution was used as the reference electrode, and washed with N2 15min, then introduce CO2 at room temperature, apply a voltage of -0.91V, collect the gas phase reduction product, use gas chromatography to analyze the composition of the reduction product, and further calculate the Faraday effect. The experimental results show that the Faraday efficiency of CO generation can reach 99%. .

Embodiment 3

[0032] The aqueous solution containing 0.5MAMP and 0.5% dodecyl dimethyl amine oxide is used as the electrolyte solution, the silver electrode is used as the working electrode, the platinum sheet is used as the counter electrode, and the Ag / AgCl in 3M KCl solution is used as the reference electrode, and it is flushed with N2 for 15 minutes , then introduce CO2 at room temperature, apply a voltage of -0.91V (V vs RHE), collect gas phase reduction products, use gas chromatography to analyze the composition of the reduction products, and further calculate the Faraday efficiency, the experimental results show that the Faraday efficiency of CO generation It can reach 96%.

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Abstract

The invention relates to an application of AMP as an electrolyte for electrochemical reduction of carbon dioxide, wherein the AMP comprises 2-amino-2-methyl-propanol, cetyltrimethylammonium bromide, cetyldimethylammonium chloride, octadecyl trimethyl ammonium chloride and dodecyl dimethyl amine oxide, the 2-amino-2-methyl-propanol is used as a water-based electrolyte, the cetyltrimethylammonium bromide, the hexadecyl dimethyl ammonium chloride, the octadecyl trimethyl ammonium chloride and the dodecyl dimethyl amine oxide are sequentially used as catalytic surfactants to be used for CO2 electrocatalytic reduction through chemical reaction. An AMP aqueous solution is used as the electrolyte, and due to steric hindrance effect, the low-stability carbamate formed after carbon dioxide is absorbed can promote CO2 reduction in the aspect of electrochemical reduction of CO2, and the CO2 conversion efficiency is improved. The invention aims at using a solution composed of the AMP, the surfactants and water as an electrolyte to promote the electrocatalytic reduction performance of CO2 and realize efficient electroreduction of CO2 under the action of a silver catalyst.

Description

technical field [0001] The field of electrochemical reduction of carbon dioxide that the present invention relates to specifically relates to the application of AMP as an electrolytic solution for electrochemical reduction of carbon dioxide. Background technique [0002] Carbon dioxide is the main greenhouse gas, and its emission leads to global temperature rise. The resulting environmental problems are related to human survival and development. If the global temperature rises by 6°C, far exceeding the "safety line" of 2°C, if no measures are taken, it will bring disastrous consequences. The burning of fossil fuels has resulted in a large amount of CO2 emissions, resulting in accelerated global warming in recent years. However, due to the low price of coal and the mature development of combustion technology, it has caused human dependence on fossil fuels, and it will still be the main source of energy in a short period of time. Carbon capture and storage (CCS) and carbon c...

Claims

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Application Information

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IPC IPC(8): C25B1/23
CPCC25B1/23
Inventor 徐霞钱文彬孙培绪王肖肖徐建
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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