Riboflavin promoting low concentration CO2 electrochemical trapping method

Abstract

The invention provides a riboflavin promoting low concentration CO2 electrochemical trapping method, and belongs to the technical field of CO2 electrochemical trapping. The method comprises the following steps that a cation-exchange membrane is placed in an electrolytic cell; a FMN solution and a potassium acid carbonate solution are added in acathode zone; a FMNH2 solution and a potassium acid carbonate solution are added in an anode zone; direct current is applied between the anode electrode and the cathode electrode; two electrons are obtained in the cathode electrode by the FMN; two protons are received in a KHCO3 solution to form the FMNH2 solution in the reduction state; generated CO32-enters the solution and is used for absorbing low concentration CO2; the FMNH2 releases electrons at the anode electrode and returns to a oxidized state FMN; and the protons leave the FMNH2 to react with KHCO3 in the solution to release high concentration CO2. Low concentration CO2 trapping is achieved; when electric current density is at 10mAcm-2, the average voltage for trapping the CO2 is 0.065V, energy consumption of trapping one ton of the CO2 is about 80KWh, while energy consumption of trapping one ton of the CO2 by an existing chemical absorption method of MES regeneration is 370-510 KWh, so that energy saving is more than 75%.

Description

technical field [0001] The invention belongs to electrochemical capture CO 2 Technical field, specifically a kind of riboflavin promotes low concentration CO 2 method of electrochemical capture. Background technique [0002] Combustion of fossil fuels is the main source of carbon dioxide emissions, of which the emissions from large-scale industrial production processes such as thermal power plants and steel mills account for about 40% of the total carbon dioxide emissions. Among the currently feasible emission reduction options, such as CO 2 Geological storage, CO 2 For ocean storage, etc., it is necessary to first release low-concentration CO 2 to capture. However, CO 2 The cost of capture accounts for about 2 75% of the total cost of abatement is constrained CO 2 The main reasons for the economic viability of emission reductions. [0003] while CO 2 The main reason for the high cost of capture is due to excessive energy consumption, so the development of efficien...

AI Technical Summary

Problems solved by technology

However, CO 2 The cost of capture accounts for about 2 75% of the total cost of abatement is constrained CO 2 Main reasons for the economic viability of emission reduction

[0003] while CO 2 The main reason for the high cost of capture is due to excessive energy consumption, so the development of efficient and energy-saving carbon capture methods is very important for reducing CO 2 Reducing emissions and energy consumption is crucial

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