CO2 활용을 위한 RWGS의 촉매 기술동향

초록

Environmental problems such as climate change, ecosystem disturbance, and ocean acidification are becoming serious because carbon dioxide(CO2) emissions continue to increase. For this reason, many technologies for CO2 recycling and carbon neutrality are being studied to convert CO2 into usable materials in chemical process, and they correspond CCUS (Carbon dioxide Capture Utilization & Storage) technologies. Among the CCUS researches, RWGS(Reverse Water Gas Shift) reaction, CO2 + H2 → CO + H2O, can utilize more carbon dioxide as reaction material than the other CCU methods and synthesize an intermediate of a chemical process without fossil fuels. Accordingly, the thermodynamic equilibrium, reaction mechanism, and recent catalytic research results(metal, supported metal oxide, perovskite) for the RWGS reaction are summarized in this paper. It also mentions a chemical looping process for more efficient RWGS reaction and compares it with the general RWGS reaction. The solutions necessary for technical stabilization of the chemical looping process were mentioned.

키워드