Electrochemical Reduction of CO₂ to Oxalic Acid: Experiments, Process Modeling, and Economics.

ABSTRACT: We performed H-cell and flow cell experiments to study the electrochemical reduction of CO₂ to oxalic acid (OA) on a lead (Pb) cathode in various nonaqueous solvents. The effects of anolyte, catholyte, supporting electrolyte, temperature, water content, and cathode potential on the Faraday efficiency (FE), current density (CD), and product concentration were investigated. We show that a high FE for OA can be achieved (up to 90%) at a cathode potential of -2.5 V vs Ag/AgCl but at relatively low CDs (10-20 mA/cm²). The FE of OA decreases significantly with increasing water content of the catholyte, which causes byproduct formation (e.g., formate, glycolic acid, and glyoxylic acid). A process design and techno-economic evaluation of the electrochemical conversion of CO

SUBMITTER: Boor V 

PROVIDER: S-EPMC9562277 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature