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Type: Artigo de periódico
Title: [v,al]-mcm-22 Catalyst In The Oxidative Dehydrogenation Of Propane
Author: Teixeira-Neto A.A.
Marchese L.
Landi G.
Lisi L.
Pastore H.O.
Abstract: MCM-22 zeolite containing vanadium atoms either at structural or at ion-exchange positions was synthesized and tested in propane oxidative dehydrogenation (ODH) reaction in a fixed bed reactor, at temperatures between 340 and 560 °C. Acidity of these materials, as well as of similar materials that did not contain vanadium, was characterized by ammonia temperature programmed desorption (TPD-NH3). Vanadoaluminosilicates contain a higher number of acid sites, which present higher acidity in relation to the aluminosilicates. They also presented better performances in propane ODH, as they lead to higher values of conversion without loss of selectivity. Ion-exchange with alkaline ions leads to a decrease in cracking reactions, which are caused by strong Brønsted acid sites. © 2007 Elsevier B.V. All rights reserved.
Citation: Catalysis Today. , v. 133-135, n. 1-4, p. 1 - 6, 2008.
Rights: fechado
Identifier DOI: 10.1016/j.cattod.2007.11.012
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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