Cobalt-based catalysts derived from cobalt carbonyl clusters for Fischer-Tropsch synthesis

Co catalysts supported on gamma-Al2O3 were prepared using Co-2(CO)(6)HCCCOOH, Co-3(CO)(9)CCH2COOH, and Co-4(CO)(10)HCCCOOH as precursors. Co(NO3)(2) was used as the precursor for preparing the reference catalyst. The results of Fischer-Tropsch synthesis tests and characterization by transmission electron microscopy, NH3 temperature-programmed desorption, and infrared showed that the different precursors have significant effects on the dispersion of the Co, which affect their catalytic behavior. CO conversion and C5+ selectivity over these catalysts prepared from different precursors decreased in the order Co-3(CO)(9)CCH2COOH > Co-2(CO)(6)HCCCOOH > Co-4(CO)(10)HCCCOOH > Co(NO3)(2). (C) 2014, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved