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Titolo:
Direct evidence of intramolecular rearrangement in skeletal isomerization of n-butane over bifunctional catalysts
Autore:
Suzuki, T; Okuhara, T;
Indirizzi:
Hokkaido Univ, Grad Sch Environm Earth Sci, Sapporo, Hokkaido 0600810, Japan Hokkaido Univ Sapporo Hokkaido Japan 0600810 oro, Hokkaido 0600810, Japan
Titolo Testata:
CATALYSIS LETTERS
fascicolo: 1-2, volume: 72, anno: 2001,
pagine: 111 - 113
SICI:
1011-372X(2001)72:1-2<111:DEOIRI>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
SULFATED ZIRCONIA CATALYSTS; SOLID SUPERACID CATALYST; CESIUM HYDROGEN SALTS; 12-TUNGSTOPHOSPHORIC ACID; MANGANESE; OXIDE; IRON;
Keywords:
skeletal isomerization; n-butane; C-13-butane; heteropoly compounds;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Okuhara, T Hokkaido Univ, Grad Sch Environm Earth Sci, Sapporo, Hokkaido 0600810, Japan Hokkaido Univ Sapporo Hokkaido Japan 0600810 do 0600810, Japan
Citazione:
T. Suzuki e T. Okuhara, "Direct evidence of intramolecular rearrangement in skeletal isomerization of n-butane over bifunctional catalysts", CATAL LETT, 72(1-2), 2001, pp. 111-113

Abstract

Mechanisms of skeletal isomerization of n-butane over bifunctional catalysts, Pt-Cs2.5H0.5PW12O40 and Pt-sulfated ZrO2, as well as the corresponding solid acids were studied using 1,4-C-13(2)-n-butane. The isotopic distributions of the reactant and product were analyzed with field ionization mass spectrometry, by which the parent peak patterns were obtained. It was found that 1,4-C-13(2)-n-butane was selectively isomerized to C-13(2)-isobutane over these catalysts in the presence of H-2 at 423-523 K, while the corresponding solid acids gave isobutane with binomial distributions of C-13. Theseresults clearly demonstrate that the skeletal isomerization of n-butane proceeded mainly via a monomolecular path with intramolecular rearrangement on both the bifunctional catalysts, while it occurred through a bimolecular path with intermolecular rearrangement on the solid acids. This difference in reaction mechanism is reflected on that in the selectivity to isobutane.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/01/20 alle ore 09:33:17