Progress in reaction mechanisms and catalyst development of carbon dioxide methanation
Liang Han, C.Y. Zhao, Rui Wang, Biao Fang, Mingyue Li, Runwei Mo
Abstract
The overuse of fossil fuels has created a dual challenge for humanity, namely energy and environmental concerns. Excessive carbon emissions have resulted in a range of global climate issues. It’s of great practical significance to capture the excessive carbon dioxide emissions and convert them into high value-added chemicals or fuels. Methane is an important carrier for chemical bond energy storage due to its high mass calorific value. Carbon dioxide methanation is a promising process for reducing carbon dioxide emissions. This review introduces recent research progress on carbon dioxide methanation using thermal catalytic, bioconversion, photocatalytic, and electrocatalytic technologies. A dual-function integrated design integrating carbon dioxide capture and methanation is proposed, which not only realizes on-site capture and utilization, but also improves the manufacturability and economic benefits of the entire process.