CO2 Capture and Concentration Process by Solid Oxide Electrochemical Cells

Abstract

To decarbonize the transportation sectors, the use of atmospheric CO2 as a chemical feedstock has attracted tremendous interest from industries and academia in recent decades due to its potential to address the current challenge on global warming and climate change. The carbon capture, utilization, and sequestration technologies by electrochemical cells are being developed and investigated to reduce the energy requirement. Here, we develop and demonstrate an alternative solid oxide electrochemical cell configuration with hybrid electrolyte membrane electrode assembly (HE-MEA) for the separation and capture of CO2. This process is optimized by tuning electrolyte compositions and operating conditions to maximize CO2 capture efficiency. The working mechanism of cathode was investigated by advanced characterization techniques and resulted in the better material designs. The present study paves a way for CO2 capture at elevated temperatures.