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Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/5442
Tipo: Artigo de Periódico
Título: Effect of alkali cations on the CuZnOAl2O3 low temperature water gasshift catalyst
Título(s) alternativo(s): Catalysis Today
Autor(es): Figueiredo, Renan Tavares
Santos, Marluce S.
Andrade, Heloysa Martins Carvalho
Fierro, José Luís Garcia
Autor(es): Figueiredo, Renan Tavares
Santos, Marluce S.
Andrade, Heloysa Martins Carvalho
Fierro, José Luís Garcia
Abstract: Low temperature water gasshift catalysts containing 1.0% by weight of alkali elements (Li, K, Rb and Cs) were prepared by impregnation of a ternary Cu/ZnO/Al2O3 (CZA) base catalyst. The calcined precursors were characterized by different physical and chemical techniques such as Xray diffraction, Xray fluorescence, N2O chemisorption, N2 adsorption at low temperature and Xray photoelectron spectroscopy. Then these precursors were activated and tested in the low temperature water gasshift reaction (LTWGS). It was shown that the Kcontaining CZA catalyst exhibited the highest CO conversion level at reaction temperature within the range 450–530 K. In addition, the alkali promoters were found to prevent methanol production at temperatures higher than 480 K.
Palavras-chave: Low temperature water gasshift
reaction
Alkali promoters
Methanol synthesis
Selectivity
URI: http://www.repositorio.ufba.br/ri/handle/ri/5442
Data do documento: 2011
Aparece nas coleções:Artigo Publicado em Periódico (Química)

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