Cube proposed by: Ralph T. Yang
About this project:
In a future carbon capture and storage (CCS) technology, carbon dioxide is first captured from either ambient air or stationary sources. The captured carbon dioxide is then released into a high concentration (i.e., >90%) followed by compression into liquid form to be stored “permanently” in geological formations. Aqueous amine solutions are being contemplated as a medium for CO2 capture. A potentially more efficient medium is a solid sorbent, leading to lower energy requirement and less costly operation. In this exploratory work, we plan to try porous carbons (with high surface areas) aided by doping of nitrogen and/or boron to increase the CO2 sorption capacity. Design of mechanical cyclic operation devices (such as pressure/vacuum swing as well as combined temperature swing cycles) will be studied that would enable desorption into >90% CO2. The important issue of societal impact of CCS technology will be critically examined.