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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/7655

Title: Zeolite catalysts for the water gas shift reaction
Other Titles: Applied Catalysis A: General
Authors: Souza, Tânia Regina Oliveira de
Brito, Suzana Modesto de Oliveira
Andrade, Heloysa Martins Carvalho
Keywords: Water gas shift reaction;Cu-ZSM-5, Cu,Zn-ZSM-5;Cation exchange;Steam tolerance
Issue Date: Mar-1999
Abstract: Cu- and Cu,Zn-ZSM-5 zeolite catalysts were prepared using different cation exchange procedures. The samples were characterized by TPR; CO-FTIR; O2-TPD, XRD; BET and XPS. These catalysts showed appreciable activity and selectivity for the water gas shift reaction at 300–400°C and vapor/gas ratio=3. The Cu,Zn-ZSM-5 catalysts deactivated after a long exposure to steam, at high temperature. The catalytic activity of co-exchanged zeolite catalysts depended on the preparation method. The introduction of zinc ions enhanced the activity of the Cu-ZSM-5 catalysts but Zn-ZSM-5 catalyst was found to be inactive for the water gas shift reaction. The role of zinc was to change the distribution of the copper species in the zeolite catalyst.
Description: Texto completo: acesso restrito, p. 7-15
URI: http://www.repositorio.ufba.br/ri/handle/ri/7655
ISSN: 0926-860X
Appears in Collections:Artigos Publicados em Periódicos (Quimica)

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