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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/5442

Title: Effect of alkali cations on the CuZnOAl2O3 low temperature water gasshift catalyst
Other Titles: Catalysis Today
Authors: Figueiredo, Renan Tavares
Santos, Marluce S.
Andrade, Heloysa Martins Carvalho
Fierro, José Luís Garcia
Keywords: Low temperature water gasshift;reaction;Alkali promoters;Methanol synthesis;Selectivity
Issue Date: 2011
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.
Description: texto completo: acesso restrito. p. 166– 170.
URI: http://www.repositorio.ufba.br/ri/handle/ri/5442
ISSN: 0920-5861
Appears in Collections:Artigos Publicados em Periódicos (Quimica)

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