Innovative reverse-electrodialysis power generation system for carbon capture and utilization

Global warming has become a serious threat biosphere and effective measures are required to mitigate its intensification. To this end, carbon capture and sequestration (CCS) is a promising technology, while post-combustion capture (PCC) has been developed from CCS. However, an energy penalty during the regeneration step of the CO2 absorbent has remained a critical problem. In the present study, a lab-scale test was conducted on carbon capture with reverse-electrodialysis (CCRED) to evaluate its potential to overcome the technical and economic drawbacks of CCS and RED. The results show that a normalized peak power density of 1 W/m2, equal to 328.6 kJ/kgCO2, could be obtained. The peak power density was 2000-fold higher than that in previous studies. By utilizing CO2 as an energy source in CCRED, this novel process can compensate for the energy penalty in conventional CCS.