A Review of CO <sub>2</sub> Methanation Process: Recent Advances and Future Prospects
Wei Wang, Minh Nguyen-Quang, Diego Mateo, Xue Yong, Tao Li, Haiquan Xie, Wei Chu, Cuong Pham-Huu, Xin Tu, Jorge Gascón
Abstract
Catalytic CO 2 conversion can not only effectively alleviate CO 2 emissions but also convert it into high-value-added products, which is of great significance for achieving the mid-to-long-term strategic goals of carbon peaking and carbon neutrality in many countries around the world. CO 2 methanation, as a key step in the Power-to-Gas (PtG) technology chain, has been considered to be one of the most promising routes for CO 2 utilization. Due to the chemical inertness and thermodynamic stability of the CO 2 molecule and the strong exothermic nature of this reaction, catalysts with suitable activity and sintering resistance, as well as catalytic systems with desirable heat management capability, are the key factors regarding its industrial application. Induction heating (IH), plasma, photothermal catalysis, as well as electrocatalysis approaches have been employed to boost the overall performance of catalytic CO 2 methanation in recent decades. Herein, the recent state-of-the-art advances in CO 2 methanation in the above aspects have been fully summarized in terms of both catalyst and catalytic system design. Future development and challenges of these technologies for CO 2 methanation have also been discussed.