Research progress on iron-based catalysts for CO₂ hydrogenation to long-chain linear α-olefins

Long-chain linear α-olefins (LAOs) are important industrial chemicals, which are mainly obtained from petrochemical process. With the increased impact of the greenhouse effect globally, research on CO₂ control and mitigation has attracted much attention. Fischer-Tropsch synthesis (FTS) provides an alternative route to obtain LAOs. In this paper, research progress on iron-based catalysts including the roles of promoters and supports for the process of CO₂ hydrogenation to LAOs are analyzed. Key factors affecting the selectivity of LAOs are discussed. Challenges and possible solutions of the reaction are summarized, and an outlook for designing high-efficient iron-based catalysts is thus presented.