Catalytic performance of Fe-Mn/SiO 2 nanocatalysts for CO hydrogenation

A series of x (fe,mn)/sio 2 nanocatalysts (x = 5,10,15,20,25,and 30 wt.) were prepared by sol-gel method and studied for the light olefins production from synthesis gas. it was found that the catalyst containing 20 wt. (fe,mn)/sio 2 is an optimal nano catalyst for production of c 2-c 4 olefins. effects of sulfur treatment on the catalyst performance of optimal catalyst have been studied by espousing different volume fractions of h 2s in a fixed bed stainless steel reactor. the results show that the catalyst treated with 6 v of h 2s had high catalytic performance for c 2-c 4 light olefins production. the best operational conditions were h 2/co = 3/2 molar feed ratio at 260°c and ghsv = 1100 h -1 under 1 bar total pressure. characterization of catalysts was carried out using x-ray diffraction (xrd),scanning electron microscopy (sem),transmission electron microscopy (tem),and surface area measurements. © 2013 mostafa feyzi et al.