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Issue 16, 2017, Issue in Progress
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Effects of macropores on reducing internal diffusion limitations in Fischer–Tropsch synthesis using a hierarchical cobalt catalyst

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Abstract

Internal diffusion limitations in Fischer–Tropsch catalysts strongly affects their catalytic activities and product selectivities. Large pellet catalysts demonstrate especially severe internal diffusion limitations in fixed bed reactors. In order to overcome this problem, macropores were introduced into cobalt catalysts, and the resulting effects on reaction activity and selectivity were studied. Meso–macroporous silica (S1) with mesoporous walls was prepared by a sol–gel process and was used to prepare the Co/S1 catalyst. A bimodal mesoporous silica (S2) support with an equivalent mesopore diameter to the S1 support was also prepared for comparison. The effects of internal diffusion limitations in the S1 and S2 supports with different pellet sizes on FT synthesis were investigated. The results showed that the macropores played an important role in reducing internal diffusion limitations, especially for large pellet catalysts.

Graphical abstract: Effects of macropores on reducing internal diffusion limitations in Fischer–Tropsch synthesis using a hierarchical cobalt catalyst

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Publication details

The article was received on 22 Nov 2016, accepted on 30 Dec 2016 and first published on 31 Jan 2017


Article type: Paper
DOI: 10.1039/C6RA27166A
Citation: RSC Adv., 2017,7, 9436-9445
  • Open access: Creative Commons BY-NC license
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    Effects of macropores on reducing internal diffusion limitations in Fischer–Tropsch synthesis using a hierarchical cobalt catalyst

    H. Li, J. Wang, C. Chen, L. Jia, B. Hou and D. Li, RSC Adv., 2017, 7, 9436
    DOI: 10.1039/C6RA27166A

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