Jump to main content
Jump to site search


Effect of hierarchical meso–macroporous structures on the catalytic performance of silica supported cobalt catalysts for Fischer–Tropsch synthesis

Author affiliations

Abstract

A series of meso–macroporous silica supports with the same macroporous diameter but different mesoporous diameters were prepared by introducing phase separation into a sol–gel process and used to prepare cobalt catalysts for Fischer–Tropsch synthesis. The mesoporous diameter could be controlled in the range 6.5–35.0 nm while the macroporous diameter was kept at approximately 500 nm. The mesoporous porosity of the meso–macroporous silica supports greatly influenced the size, reducibility and dispersion of cobalt nanoparticles, and therefore resulted in different catalytic performances for Fischer–Tropsch synthesis. The meso–macroporous catalyst with an appropriate mesoporous size of 8.5 nm displayed a higher catalytic activity due to the best combination of the Co dispersion and reduction degree. The product distribution strongly depended on the mesoporous diameter due to the following two reasons: 1) the difference in the H2/CO ratio on the active sites due to the diffusional limitations of CO in the mesopores; 2) the Co crystallite size effect. In addition, large pellet catalysts (800–1700 μm) exhibited similar product distributions to small pellet catalysts (180–250 μm), which indicated that the macropores played an important role in reducing internal diffusion limitations for large pellet catalysts.

Graphical abstract: Effect of hierarchical meso–macroporous structures on the catalytic performance of silica supported cobalt catalysts for Fischer–Tropsch synthesis

Back to tab navigation

Supplementary files

Publication details

The article was received on 12 Jun 2017, accepted on 19 Jul 2017 and first published on 20 Jul 2017


Article type: Paper
DOI: 10.1039/C7CY01180F
Citation: Catal. Sci. Technol., 2017, Advance Article
  •   Request permissions

    Effect of hierarchical meso–macroporous structures on the catalytic performance of silica supported cobalt catalysts for Fischer–Tropsch synthesis

    H. Li, B. Hou, J. Wang, X. Huang, C. Chen, Z. Ma, J. Cui, L. Jia, D. Sun and D. Li, Catal. Sci. Technol., 2017, Advance Article , DOI: 10.1039/C7CY01180F

Search articles by author

Spotlight

Advertisements