Zeolite catalysts for the water gas shift reaction

Autor:	Heloysa Martins Carvalho Andrade, Suzana Modesto de Oliveira Brito, Tânia Regina Oliveira de Souza
Rok vydání:	1999
Předmět:	Chemistry Process Chemistry and Technology Catalyst support Industrial catalysts Inorganic chemistry chemistry.chemical_element Water gas Zinc Molecular sieve Zeolite Catalysis Water-gas shift reaction
Zdroj:	Applied Catalysis A: General. 178:7-15
ISSN:	0926-860X
DOI:	10.1016/s0926-860x(98)00280-4
Popis:	Cu- and Cu,Zn-ZSM-5 zeolite catalysts were prepared using different cation exchange procedures. The samples were characterized by TPR; CO-FTIR; O 2 -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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::745ab676d585ee4beae11aaa60e59c3d https://doi.org/10.1016/s0926-860x(98)00280-4 Zobrazit plný text záznamu Full Text from ScienceDirect