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Titolo:
Probing polyfunctional nature of vanadyl pyrophosphate catalysts: oxidation of 16 C-4 molecules
Autore:
Guliants, VV; Holmes, SA;
Indirizzi:
Univ Cincinnati, Dept Chem Engn, Cincinnati, OH 45221 USA Univ CincinnatiCincinnati OH USA 45221 em Engn, Cincinnati, OH 45221 USA
Titolo Testata:
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
fascicolo: 1-2, volume: 175, anno: 2001,
pagine: 227 - 239
SICI:
1381-1169(20011023)175:1-2<227:PPNOVP>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
P-O CATALYSTS; MALEIC-ANHYDRIDE; SELECTIVE OXIDATION; BUTANE OXIDATION; N-BUTANE; (VO)(2)P2O7 CATALYSTS; REACTION-MECHANISM; VPO CATALYSTS; ACTIVE-SITE; INSITU FTIR;
Keywords:
vanadyl pyrophosphate; selective oxidation; mechanism; active site; oxidation state;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
57
Recensione:
Indirizzi per estratti:
Indirizzo: Guliants, VV Univ Cincinnati, Dept Chem Engn, Cincinnati, OH 45221 USA Univ Cincinnati Cincinnati OH USA 45221 innati, OH 45221 USA
Citazione:
V.V. Guliants e S.A. Holmes, "Probing polyfunctional nature of vanadyl pyrophosphate catalysts: oxidation of 16 C-4 molecules", J MOL CAT A, 175(1-2), 2001, pp. 227-239

Abstract

A vanadyl pyrophosphate catalyst, (VO)(2)P2O7, was investigated for its ability to selectively oxidize 16C(4) probe molecules, including hydrocarbons, alcohols, diols, and five-membered heterocycles, to maleic anhydride in afixed bed microreactor. It was observed that besides linear-chain hydrocarbons and five-membered heterocycles previously studied, the butanols and butanediols can also be selectively oxidized into maleic anhydride. This demonstrates the existence of new selective oxidation pathways of organic molecules over the VPO catalysts. A novel cis-(su)peroxo-oxovanadium(V) dimeric active surface site is proposed for the (100) plane of (VO)(2)P2O7. New selective oxidation pathways of organic molecules over the (VO)(2)P2O7 catalyst involving the proposed active surface site are described. The proposed pathways are consistent with both the redox behavior of V-IV and V-V and the known organic chemistry of the C-4 probe molecules. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/07/20 alle ore 05:30:26