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Novel cobalt zinc oxide Fischer-Tropsch catalysts synthesised using supercritical anti-solvent precipitation

Marin, Raimon P., Kondrat, Simon A., Davies, Thomas, Morgan, David John ORCID:, Enache, Dan I., Combes, Gary B., Taylor, Stuart H. ORCID:, Bartley, Jonathan Keith ORCID: and Hutchings, Graham John ORCID: 2014. Novel cobalt zinc oxide Fischer-Tropsch catalysts synthesised using supercritical anti-solvent precipitation. Catalysis Science & Technology 4 (7) , pp. 1970-1978. 10.1039/c4cy00044g

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Cobalt zinc oxide catalysts have been prepared by anti-solvent precipitation in supercritical CO2 and investigated for CO hydrogenation. Here we show how the textural and catalytic properties of the catalyst can be tailored by the addition of water to the initial solution of cobalt and zinc acetates in methanol. Characterization of the catalysts by powder X-ray diffraction, infra-red and Raman spectroscopy showed that in the absence of water a high surface area mixed acetate was produced which upon calcination formed wurtzite type Zn1−xCoxO and spinel type ZnxCo3−xO4. The addition of 5 vol.% water resulted in a phase separated Co3O4/ZnO catalyst and enhanced active cobalt surface area as a result of disruption of the solvent/CO2 phase equilibrium during precipitation.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Cardiff Catalysis Institute (CCI)
Subjects: Q Science > QD Chemistry
Publisher: Royal Society of Chemistry
ISSN: 2044-4753
Date of First Compliant Deposit: 30 March 2016
Date of Acceptance: 7 April 2014
Last Modified: 18 Aug 2023 20:55

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