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- W2301588712 abstract "Cobalt is one of the most active metals for synthesis gas (carbon monoxide plus hydrogen) reactions. Cobalt catalyst activity can be influenced by support, additives and the number of active sites formed by reduction. The active site density is governed by Co degrees crystallite size, Co degrees dispersion and the degree of reduction (Zhang et al, 2009). The chemical properties of the support also play a role in influencing the catalytic activity primarily through modifying the reducibility and dispersion of cobalt. Synthesis of highly dispersed Co catalysts may require a strong interaction between the support and Co metal but this can be to the detriment of catalyst activity. Catalyst synthesis conditions play a significant role in controlling this interaction. Solvents used to dissolve the Co precursor can influence the interaction between cobalt and the support (Ho and Su, 1997). The pH value of the precursor solution can also alter the interaction between cobalt and the support, providing variations in dispersion and reducibility of the supported cobalt which in turn strongly impact on the catalytic performance (Ming and Baker, 1995). This work studies the influence that non-aqueous or aqueous precursor solutions have on cobalt crystallite size, cobalt dispersion, degree of reduction and methanation activity during the impregnation of cobalt catalyst on two types of gamma-alumina support." @default.
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- W2301588712 date "2011-01-01" @default.
- W2301588712 modified "2023-09-24" @default.
- W2301588712 title "The effect of support and synthesis method on the methanation activity of alumina-supported cobalt catalysts" @default.
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