The effect of Cu on Fe-Mn based catalysts system in production of light olefins via Fischer-Tropsch process was investigated. Catalysts with different Cu loadings were synthesized and evaluated. The 3.0 wt% Cu promoted Fe-Mn catalyst demonstrated an activity as high as 3.58×10⁻⁶ mol_CO g_cat⁻¹ s⁻¹. The corresponding conversion of CO and selectivity to light olefins are 96.9 % and 40.1 %, respectively. Characterization results indicated that the Cu promoter facilitated the reduction process and enhanced the H-assisted CO dissociative adsorption, by changing the interactions between metals and the SiO₂, which lead to an improved activity. The overall weakened surface basicity caused by Cu decreased the chain growth probability and lead to a higher selectivity to light olefins by shifting the product distribution toward short-chain hydrocarbons. Furthermore, all prepared catalysts showed superior efficiency of carbon utilization with CO₂ selectivity as low as 23.0 % due to the hindered water-gas shift (WGS) reaction.

的Cu的铁-锰基催化剂体系在生产轻质烯烃的效果通过费-托方法进行了研究。合成并评估了具有不同铜负载量的催化剂。3.0wt％的Cu促进的Fe-Mn催化剂表现出高达3.58×10 ^-6 mol _CO g _cat ^-1 s ^-1的活性。CO和向轻烯烃的选择性的相应转化率分别为96.9％和40.1％。表征结果表明，Cu促进剂通过改变金属与SiO ₂之间的相互作用，促进了还原过程并增强了H辅助的CO离解吸附。，从而改善了活动。Cu导致的整体表面碱度减弱，降低了链增长的可能性，并通过将产物分布向短链烃转移而导致对轻烯烃的更高选择性。此外，由于水煤气变换（WGS）反应受阻，所有制备的催化剂均显示出优异的碳利用率，CO ₂选择性低至23.0％。