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Desilication of MOR zeolite: Conventional versus microwave assisted heating by V. Paixão; R. Monteiro; M. Andrade; A. Fernandes; J. Rocha; A.P. Carvalho; A. Martins is a Materials Science article available to read on EtoBox.

What is Desilication of MOR zeolite: Conventional versus microwave assisted heating about?

MOR zeolites were modified via desilication treatments with NaOH, under conventional and microwave heating. The samples were characterized by powder X-ray diffraction, 27 Al and 29 Si NMR spectroscopy, TEM and N 2 adsorption at -196 • C. The acidity of the samples and the space available inside the pores were evaluated through a catalytic model reaction, the isomerization of m-xylene, for which the profiles of the coke thermal decomposition were also analyzed. Powder X-ray diffraction and 29 Si and 27 Al MNR results show that in comparison with conventional heating, microwave irradiation (a less time consuming process) leads to identical amount of Si extraction from the zeolite framework. With this treatment, in addition to the customary mesopores development promoted by conventional heating, a partial conversion of the zeolite microporosity into larger micropores, is observed. The microwave irradiated and conventionally heated samples show different catalytic behavior in the m-xylene isomerization model reaction. It was observed that, by controlling the experimental conditions, it is possible to obtain samples with catalytic properties closer to the parent material, which is also

Who reads Desilication of MOR zeolite: Conventional versus microwave assisted heating?

Author

V. Paixão; R. Monteiro; M. Andrade; A. Fernandes; J. Rocha; A.P. Carvalho; A. Martins

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0926-860X)

Published

2011

Language

EN

Field

Materials Science (Physical Sciences)