CO2 capture by Li4SiO4 Sorbents: From fundamentals to applications

Carbon capture, utilization and storage (CCUS) is widely acknowledged as an essential route to mitigate CO2 emissions into atmosphere. Li4SiO4 as a sort of high-temperature CO2 sorbent has great potentials in CCUS ap-plications, as well as being integrated with other high value-added processes like the integrated CO2 capture and utilization (ICCU). This review critically discusses the state-of-the-art researches on the CO2 capture by Li4SiO4 from the fundamental aspects of thermodynamic equilibrium, reaction mechanisms and kinetics, sorbent mod-ifications, to potential applications. Difference between theoretical and practical CO2 adsorption/desorption equilibrium is emphasized, product layer distribution features and adsorption/desorption mechanisms are dis-cussed, typical kinetic models and their applications in CO2 adsorption and desorption by Li4SiO4 are analyzed, and recent advances in high-efficient Li4SiO4-based sorbents are summarized. We hope this review can stimulate future studies on understanding the basic features and mechanism of CO2 capture process, developing low-cost and scalable sorbent manufacturing method, and establishing more integrated and effective systems for the high -value disposal of CO2.

Automated summary

This review critically discusses the state-of-the-art researches on the CO2 capture by Li4SiO4, focusing on thermodynamic equilibrium, reaction mechanisms, kinetics, sorbent modifications, and potential applications. It emphasizes the difference between theoretical and practical CO2 adsorption/desorption equilibrium, discusses the distribution features and mechanisms, analyzes kinetic models and recent advances in high-efficient Li4SiO4-based sorbents.