Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Application of supercritical fluid desiccation to preparation of VPO catalysts for n-butane selective oxidation to maleic anhydride
Autore:
Zhou, L; Li, JF; Li, RJ; Shen, SK;
Indirizzi:
Univ Petr, Key Lab Catalysis, China Natl Petr Corp, Beijing 102200, Peoples R China Univ Petr Beijing Peoples R China 102200 Beijing 102200, Peoples R China
Titolo Testata:
CHINESE JOURNAL OF CATALYSIS
fascicolo: 5, volume: 22, anno: 2001,
pagine: 427 - 431
SICI:
0253-9837(200109)22:5<427:AOSFDT>2.0.ZU;2-A
Fonte:
ISI
Lingua:
CHI
Soggetto:
PHOSPHORUS OXIDE CATALYSTS; VANADYL PYROPHOSPHATE;
Keywords:
supercritical fluid desiccation; vanadium oxide; phosphorus oxide; double oxide; n-butane; selective oxidation; maleic anhydride; lattice oxygen;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
11
Recensione:
Indirizzi per estratti:
Indirizzo: Zhou, L Univ Petr, Key Lab Catalysis, China Natl Petr Corp, Beijing 102200, Peoples R China Univ Petr Beijing Peoples R China 102200 102200, Peoples R China
Citazione:
L. Zhou et al., "Application of supercritical fluid desiccation to preparation of VPO catalysts for n-butane selective oxidation to maleic anhydride", CHIN J CATA, 22(5), 2001, pp. 427-431

Abstract

The vanadyl pyrophosphate (VPO) catalysts for the n-butane selective oxidation to maleic anhydride were prepared by means of supercritical fluid desiccation (VPO U) and conventional (VPO I) methods, respectively. The BET surface area of the VPO II catalyst (38.8 m(2)/g) is remarkably higher than that of the VPO I catalyst (10.7 m(2)/g). XRD patterns show that both the catalysts have almost the same main phase of (VO)(2)P2O7, except that the content of the VOPO4 phase in VPOII is slightly higher than that in VPO I. The performance of the VPO II catalyst for the n-butane selective oxidation to maleic anhydride in the absence of oxygen or in the butane/air co-feed is better than that of the VPO I catalyst. The pulse reaction results indicate that the amount of selective lattice oxygen in VPO II increases by 150% compared with VPO I. The co-feed evaluations of 1.5% butane in air over the VPO II and VPO I catalysts give 51.8% and 41.9% of maleic anhydride yields under the reaction conditions of 420 degreesC, atmospheric pressure and GHSV = 1000 h(-1), respectively. The promotional effect of the supercritical fluid desiccation method on the catalytic performance may be attributed to thesignificant increase in the surface area and V5+ ions in the VPO catalyst.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/07/20 alle ore 05:53:26