Application of water-tolerant Co/β-SiC catalysts in slurry phase Fischer–Tropsch synthesis

Application of water-tolerant Co/β-SiC catalysts in slurry phase Fischer–Tropsch synthesis

[Display omitted] •A review of the existing literature for cobalt supported on β-SiC in FTS.•Show aspects of our in-house work on water tolerant catalysts for CSTR reactors.•Co/β-SiC catalysts have been prepared by slurry impregnation of cobalt nitrate.•First time testing in CSTR reactors at high wa...

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Bibliographic Details
Published in:Catalysis today Vol. 275; pp. 2 - 10
Main Authors: Labuschagne, J., Meyer, R., Chonco, Z.H., Botha, J.M., Moodley, D.J.
Format: Journal Article
Language:English
Published: Elsevier B.V 15-10-2016
Subjects:
Cobalt
Fischer–Tropsch
Slurry
Water
β-SiC
Fischer–Tropsch
Water
β-SiC
Cobalt
Slurry
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Summary:[Display omitted] •A review of the existing literature for cobalt supported on β-SiC in FTS.•Show aspects of our in-house work on water tolerant catalysts for CSTR reactors.•Co/β-SiC catalysts have been prepared by slurry impregnation of cobalt nitrate.•First time testing in CSTR reactors at high water partial pressures (ca 10bar).•Modification of the β-SiC surface leads to enhanced catalytic performance. High surface area, porous β-SiC has significant potential for use as a catalyst support in Fischer–Tropsch synthesis (FTS) due to its high hydrothermal stability. In recent times there has been a large amount of work done utilizing β-SiC as catalyst support for FTS but these have been applied to fixed bed reactor (FBR) systems. In this study we first review the existing literature for cobalt supported on β-SiC in FTS and secondly outline selected aspects of our in-house study of water tolerant catalysts for application in slurry phase reactors, which present a more hydrothermally demanding environment than FBR’s. Co/β-SiC catalysts have been prepared by slurry impregnation of cobalt nitrate and tested for the first time in slurry phase CSTR reactors at high water partial pressures (ca 10bar). These catalysts appear to have a high water tolerance compared to standard refractory oxide catalysts and upon optimal calcination afford excellent activities and low methane selectivity’s. Further modification of the β-SiC surface by acid washing and extended oxidation or surface modification with TiO2 can lead to significant improvements in catalytic performance over the unmodified supports.
ISSN:0920-5861
1873-4308
DOI:10.1016/j.cattod.2016.01.039