Advances in state-of-art valorization technologies for captured CO2 toward sustainable carbon cycle

Abstract

ABSTRACTValorization of captured CO2 is an important but challenging topic since CO2 is a stable and relatively inert compound. Nonetheless, CO2 valorization technologies should be sought after, because they can offer an opportunity for the sustainable carbon cycle towards a circular economy by creating value-added products and generate revenues from CO2. This paper provides an overview of state-of-the-art valorization technologies for captured CO2, including (1) supercritical CO2 as a reactive solvent, (2) mineralization of CO2 as inorganic carbonates, (3) catalytic reduction of CO2 into organic fuel for transport, (4) transformation of CO2 to value-added chemicals, and (5) biological CO2 utilization. The principles and application, in terms of CO2 conversion performance and environmental benefits of each technology, are reviewed in detail. In addition, the perspectives and prospects of CO2 valorization technologies as a portfolio solution are provided to achieve the effective CO2 reduction while minimizing social and economic costs in the near future.