Recent advances of photothermal technology in CO2 capture and methanation

Abstract

Producing synthetic natural gas (SNG) from hydrogen via water electrolysis and industrial CO2 addresses renewable energy surplus while integrating CH4 into existing natural gas grids. However, the energy-intensive processes of hydrogen production, CO2 capture, and methanation increase energy demands and emissions. Limited research focuses on cost reductions from a CO2 perspective. Emerging photothermal technology shows promise in enhancing efficiency and reducing energy use in CO2 capture and methanation. This review highlights advancements in photothermal materials design, cyclic CO2 capture performance, catalysts, and the integration of capture and methanation. It also examines reactor designs and techno-economic assessments, concluding with challenges and future directions for practical application.