(521ae) Development of High-Efficiency Catalysts for Light Olefin Production through CO2 Hydrogenation over Fe-Based Catalysts

Carbon dioxide (CO₂) is a major contributor to global warming. Carbon capture and utilization (CCU) is a promising strategy to deal with increasing levels of CO₂, which not only mitigates CO₂ emission but also allows the utilization of CO₂ as a feedstock for the synthesis of valuable chemicals and fuels. Direct CO₂ hydrogenation is one of the promising route for light olefin synthesis by increasing the single pass yield. Fe-based catalysts are considered good candidates for olefin production via CO₂ hydrogenation because they have dual active sites of iron oxide and iron carbide for RWGS and FTS reactions. However, Fe alone cannot achieve the high olefin yields due to its low CO₂ conversion and high CH₄ selectivity under mild operating conditions. Fe-based catalysts are often promoted with various metal oxides and alkali metals to enhance olefin selectivity and CO₂ adsorption capacity. In this study, we investigated the effect of metal oxides and alkali promoters on the light olefin (C₂⁼-C₄⁼) yield under mild operating conditions (300~350℃ and 20~30 bar).

Acknowledgement

This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20224C10300010).