Next steps for solvent-based CO₂ capture; integration of capture, conversion, and mineralisation

Abstract

In this perspective, we detail how solvent-based carbon capture integrated with conversion can be an important element in a net-zero emission economy.

Two Stable Sodalite-Cage-Based MOFs for Highly Gas Selective Capture and Conversion in Cycloaddition Reaction

“…19,20 However, the high thermodynamic stability and kinetic inertness of CO 2 limit its chemical fixation into cyclic carbonates under mild conditions. 21 Therefore, catalysts are essential to achieve efficient functionalization of CO 2 into high-value chemicals under mild conditions.…”

Integrated Capture and Solar-driven Utilization of CO2 from Flue Gas and Air

“…8,9 Direct solar-driven utilization of captured CO2 species is therefore a more attractive way to reach net-zero carbon cycle, but barely explored due to their thermodynamic stability. 10,11,12,13 Thermo-catalytic hydrogenation of captured CO2 has recently been reported at elevated temperatures (100-150 ºC). [14][15][16] Electrochemical reduction of alkanolamine captured CO2 can also be achieved over metallic electrodes (Ag, Cu, etc.)…”

Electrochemical reduction of CO2 in the captured state using aqueous or nonaqueous amines

“…In this context, recent years have seen growing interest in “reactive capture” concepts in which CO 2 absorption and chemical conversion, for example, CO 2 hydrogenation, are integrated ( Bhattacharya et al., 2020a ; Gutiérrez-Sánchez et al., 2022 ; Heldebrant et al., 2022 ; Kothandaraman et al., 2016 , 2021 ; Liu et al., 2017 ; Mandal, 2020 ). In this scheme, the reactant is not CO 2 (g) but rather an amine-CO 2 adduct such as a carbamate.…”

“…“Reduced products” refers to chemical or fuel outputs such as CH 4 , CH 3 OH, or CO and is represented generically as a range. Red arrows denote thermal processes, while green arrows denote processes that can be electrified (B) is inspired in part by ( Heldebrant et al., 2022 ). …”