Effect of catalyst pore size on the catalytic performance of silica supported cobalt Fischer–Tropsch catalysts
2006; Elsevier BV; Volume: 247; Issue: 1-2 Linguagem: Inglês
10.1016/j.molcata.2005.11.021
ISSN1873-314X
Autores Tópico(s)Catalysis and Hydrodesulfurization Studies
ResumoA series of cobalt catalysts supported on silica with different pore size were prepared by incipient wetness impregnation method. N2 physisorption, XRD, H2-TPR, H2-TPD, DRIFTS and O2 pulse reoxidation were used to characterize the catalysts. The results showed that the pore size of the support had a significant influence on the Co3O4 crystallite diameter, catalyst reducibility and Fischer–Tropsch activity. The larger pore could cause the Co/SiO2 to form larger Co3O4 crystallite and decreased its dispersion. Catalysts with different pore size showed different CO adsorption property. The catalysts with pore size of 6–10 nm displayed higher Fischer–Tropsch activity and higher C5+ selectivity, due to the moderate particle size and moderate CO adsorption on the catalysts.
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