| Abstract [eng] |
In this project, electrochemical methods for the conversion of CO2 into organic compounds were analyzed. The electrocatalytic activity of various AISI grade steels (AISI302, AISI304, AISI316, and AISI321) in alkaline water electrolysis was investigated, and a technological scheme for an alkaline electrolyzer with key techno-economic calculations was presented. Literature data have shown that a more reliable conversion of CO2 into valuable chemical substances (e.g., formic acid) can be achieved by using H2 gas instead of direct CO2 electrochemical reduction. Electrochemical measurements of AISI grade steel electrocatalysts in alkaline water electrolysis revealed that AISI 316 steel exhibited the highest stability and activity as an electrode. Moreover, the corrosion rate analysis indicated that AISI 304 and AISI 316 sheets of steel exhibited the slowest corrosion in a 1M KOH solution. Techno-economic calculations demonstrated that a 56 MW industrial electrolyzer could produce approximately 8000 tons of green hydrogen per year. |
