Journal of the Southern African Institute of Mining and Metallurgy
versão On-line ISSN 2411-9717
DE BEER, M et al. Technical and economic aspects of promotion of cobalt-based Fischer-Tropsch catalysts by noble metals - a review. J. S. Afr. Inst. Min. Metall. [online]. 2014, vol.114, n.2, pp. 157-165. ISSN 2411-9717.
The conversion of carbon-containing feedstock into liquid fuels can proceed via the Fischer-Tropsch synthesis, which is catalysed using supported cobalt catalysts. These catalysts contain noble metals to facilitate the reduction of oxidic cobalt species in the catalyst precursor to metallic cobalt, which is the catalytically active species for the Fischer-Tropsch synthesis. This is thought to occur via hydrogen spillover, i.e. the diffusion of atomic hydrogen over the support from the noble metal to the oxidic cobalt moieties. Noble metals may also affect the dispersion of cobalt in the active Fischer-Tropsch catalyst. The economic aspect of the addition of noble metals to the Fischer-Tropsch catalyst is discussed.
Palavras-chave : catalysis; supported cobalt catalyst; noble metals; Fischer-Tropsch synthesis.