Study of activity, products selectivity and physico-chemical properties of bifunctional Fe/HZSM-5 Fischer-Tropsch catalyst: Effect of catalyst shaping

Fe/Cu/La/Si catalyst was prepared by co-precipitation, mixed with HZSM-5 zeolite and shaped to cylinders form by a binder for increasing the mechanical strength of bifunctional catalyst. Activity of the prepared Fe/HZSM5 in syngas conversion to hydrocarbons was studied in a fixed bed micro reactor. The influence of binders on the catalyst performance, physico-chemical properties and products selectivity of bifunctional Fe/HZSM-5 catalyst was studied under reaction condition, P = 1.7 MPa, T= 563 K, H-2/CO = 1 and GHSV = 5.04 nl h(-1) g(-1) Fe. The results showed that the catalyst activity for Fischer-Tropsch synthesis and water-gas-shift reactions was enhanced by the alumina binders in comparison to the silica binders and also secondary reactions in the presence of alumina were occurred rather than silica. (C) 2013 Elsevier B.V. All rights reserved.