Chemical Methanation of CO2: A Review

Abstract The chemical methanation of CO 2 may become a ubiquitous process for the production of renewable substitute natural gas from any CO 2 source coupled with renewable hydrogen. The produced gas can be fed into the natural gas pipeline or used as fuel. Over the past few years, great efforts have been made in developing the process of CO 2 methanation. In this paper, the chemical methanation, which is the most common process, is reviewed. The purpose is to present a comprehensive updated review of the process. The CO 2 methanation, covering the process mechanisms, thermodynamics, catalysts, kinetics, and reactors are discussed with the aim to outline the pathways for the future development of the methanation process.