Chapter Nine - Carbon Capture with Simultaneous Activation and Its Subsequent Transformation

Abstract

Abstract Carbon capture and storage/sequestration (CCS) is now being considered as a potential option to mitigate global warming associated with carbon accumulation. The chemical absorption technique employing efficient amino-containing absorbents has been widely developed. Nevertheless, extensive energy consumption in desorption–compression process would be a crucial barrier to realize practical CCS. On the other hand, CO2 is very attractive as a typical renewable feedstock for manufacturing commodity chemicals and fuels. However, the reactions involving CO2 are commonly carried out at high pressure, which may not be economically suitable and also pose safety concerns. Consequently, we have proposed a carbon capture and utilization (CCU) strategy as an alternative approach to addressing energy issue in CCS. This crucial point of CCU could be simultaneous activation of CO2 upon its capture (e.g., formation of carbamate/alkyl carbonate) and thus in situ catalytic transformation into value-added chemicals under mild conditions, avoiding additional desorption step. This chapter is intended to discuss carbon capture and in situ transformation of CO2 to oxazolidinones, carbonates, quinazolines, urea derivatives, isocyanates, and carbamates via the formation of C O and C N bond.