Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.1/2049
Título: Characterization of stability and porosity of SAPO-40 using m-xylene as model reaction
Autor: Lourenço, J. P.
Ribeiro, M. F.
Ribeiro, F. R.
Rocha, J.
Gabelica, Z.
Palavras-chave: Stability
m-Xylene isomerization
Porosity characterization
SAPO-40
Silico-aluminophosphates
Data: 1996
Editora: Elsevier
Citação: Lourenço, J. P.; Ribeiro, M. F.; Ribeiro, F. R.; Rocha, J.; Gabelica, Z. Characterization of stability and porosity of SAPO-40 using m-xylene as model reaction, Appl. Catal. A: General, 148, 167-180, 1996.
Resumo: The thermal and hydrothermal stability of SAPO-40 has been evaluated using the isomerization of m-xylene as model reaction. The characterization of the porosity was also studied and compared to other well known structures, namely Y zeolite, mordenite and ZSM-5. The structural changes that occur under thermal treatments influence the activity and selectivity of SAPO-40, while hydrothermal treatments do not significantly change those properties. The results confirm the high stability of SAPO-40 under thermal and hydrothermal treatments. Catalytic tests and adsorption of cyclohexane indicate that regular large side pockets or lobes exist along the main channels of SAPO-40, which create a large void volume responsible for the high rate of adsorption, high amount of adsorbed cyclohexane and the low shape selectivity in m-xylene isomerization.
Peer review: yes
URI: http://hdl.handle.net/10400.1/2049
ISSN: 0926-860X
Aparece nas colecções:FCT2-Artigos (em revistas ou actas indexadas)

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