Researching Fe Catalyst Suitable for CO2-Containing Syngas for Fischer−Tropsch Synthesis

Fischer−Tropsch (FT) synthesis is a technology to produce liquid fuels from coal, natural gas, and biomass as an alternate to crude oil. However, the quantity of emitted CO2 from the FT process consisting of syngas preparation, FT synthesis, and product workup is one of the serious disadvantages of FT process. The conversion of CO2 into hydrocarbons is one of the promising methods to decrease CO2 emissions. Effects of promoter addition on the activity of precipitated Fe catalysts for the conversion of CO2 were studied using pure CO2 and CO2-containing syngas feeds. The results suggested that CO2 can be activated by suitable promoter(s) for hydrocarbon synthesis at low temperature. Low K content is suitable for increasing hydrocarbon yield. The Fe catalysts promoted by equal Zn and Cu have higher CO and CO2 conversion and decreased CH4 selectivity.