Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6475345 | Fuel | 2017 | 13 Pages |
â¢Co-CeO2âx site terminates carbon chain growth effectively for alcohols synthesis.â¢Separation of Co and Co-CeO2âx sites may cause the long chain hydrocarbon formation.â¢Geometric structure plays an important role in determining product distribution.
Two series of supported Co-based catalysts were prepared using a facile co-impregnation method. The catalysts were examined in a fixed bed for their ability to selectively convert syngas into higher alcohols. Co-Cu and Co-CeO2âx sites have an excellent synergistic effect, which could terminate the growth of the carbon chain effectively for the synthesis of alcohols. Furthermore, the Co-CeO2âx site is more beneficial for the synthesis of higher alcohols than the Cu-Co centre. The selectivity for the formation of ethanol and C1-C3 alcohols achieved using the 10Co5Ce/carbon nanotubes catalyst were 29.7% and 89.5%, respectively. In addition, the separation of the Co and CeO2âx sites weakens the synergistic effect, and thus, causes the formation of long chain hydrocarbons. The structure-performance correlation studies suggest that the geometric structure of the catalyst likely plays an important role in determining the formation of the Co-CeO2âx site, which influences the selectivity towards higher alcohols and higher aliphatic hydrocarbons.
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