Cobalt–Aluminum co-Precipitated Catalysts and Their Performance in the Fischer–Tropsch Synthesis Full article
Journal |
Journal of Molecular Catalysis A: Chemical
ISSN: 1381-1169 |
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Output data | Year: 2001, Volume: 168, Number: 1-2, Pages: 193-207 Pages count : 15 DOI: 10.1016/S1381-1169(00)00529-X | ||
Tags | Alumina, Cobalt, Fischer-Tropsch, Metal-support interaction, Spinels | ||
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Abstract:
Cobalt–aluminum catalysts were prepared using either Co2+ precipitation onto freshly prepared Mg–Al or Zn–Al hydrotalcite (promoted samples) or co-precipitation of Co2+ and Al3+ (non-promoted samples). The evolution of initial hydrotalcite structure was monitored during its calcination and reductive treatment. It has been shown that, at moderate temperatures, hydrotalcites results decomposition yields a Co oxide phase supported by a highly defective inverted spinel-like structure. Cations Co2+ enter the support structure, and occupy both tetrahedral and octahedral positions. Octahedron coordinated Co species are reduced at 580–620°C. After the reduction at 470–480°C catalyst phase composition shows Co0 supported on inverted spinel-like structure, which contains Co2+ in the octahedral coordination. Further reduction at 600°C transforms the support to ‘ideal’ spinel, which contains no octahedron coordinated Co2+. Chemical properties of the Co–Al catalysts, including their performance in the Fischer–Tropsch synthesis (FTS), were found to depend on the catalyst reduction temperature, and thus on the support structure. Metal-support interaction is supposed to explain the observed properties of metallic cobalt.
Cite:
Khassin A.A.
, Yurieva T.M.
, Kustova G.N.
, Itenberg I.S.
, Demeshkina M.P.
, Krieger T.A.
, Plyasova L.M.
, Chermashenczeva G.K.
, Parmon V.N.
Cobalt–Aluminum co-Precipitated Catalysts and Their Performance in the Fischer–Tropsch Synthesis
Journal of Molecular Catalysis A: Chemical. 2001. V.168. N1-2. P.193-207. DOI: 10.1016/S1381-1169(00)00529-X WOS Scopus РИНЦ
Cobalt–Aluminum co-Precipitated Catalysts and Their Performance in the Fischer–Tropsch Synthesis
Journal of Molecular Catalysis A: Chemical. 2001. V.168. N1-2. P.193-207. DOI: 10.1016/S1381-1169(00)00529-X WOS Scopus РИНЦ
Dates:
Submitted: | Jun 21, 2000 |
Accepted: | Nov 6, 2000 |
Published print: | Mar 1, 2001 |
Published online: | Mar 1, 2001 |
Identifiers:
Web of science | WOS:000167526500024 |
Scopus | 2-s2.0-0035263483 |
Elibrary | 13375721 |
Chemical Abstracts | 2001:167387 |
Chemical Abstracts (print) | 134:268533 |
OpenAlex | W2068725238 |