Hydrogenation of CO2 to Olefins over Iron-Based Catalysts: A Review

The widespread use of fossil fuels has caused high CO2 concentrations in the atmosphere, which have had a great impact on climate and environment. Methods for efficiently utilizing to produce value-added chemicals received increasing attention. Among products hydrogenation, olefins, an important petrochemical feedstock, are one essential target products. Therefore, hydrogenation olefins been extensively studied, especially development high-performance catalysts. Iron-based catalysts, widely used Fischer–Tropsch synthesis reactions, also considered attractive due their excellent performance catalytic activity reaction stability. Most studies focused modulation morphology; reduction adsorption properties by tuning methods catalyst syntheses; pretreatment conditions composition order improve olefin yield. In this review, we briefly discuss thermodynamic overview reaction, optimization modifications, current insights into mechanism; moreover, summarize challenges future trends olefins.