Effects of promoters and calcination conditions on the catalytic performance of iron-manganese catalysts for Fischer-Tropsch synthesis

► Effect of calcination conditions for light olefins production by Fe/Mn catalysts was studied. ► It was found that the catalyst was promoted with 6 wt.% K is optimal catalyst. ► The reaction conditions were found 280°C, 3 atm, H2/CO = 2/1 and GHSV = 1400 h−1. ► Methane selectivity decreased from 20.3 to 6.1% by using optimal catalyst.