The prepn. of V-P catalysts from V2O5/H3PO4/benzyl- and iso-Bu alcs. trapped between the layers of the phosphate structure, which provoke disorder disorder in the plane of layer stacking. During the successive calcination, a pseudomorphic (VO)2P2O7 forms with corresponding disorder in the plane of layer stacking. Disorder in this plane influences, the catalytic activity in butane selective oxidn. and the redox properties of the catalyst, both modifying the rate of V(IV) oxidn. to V(V) and the reducibility of the catalyst in a flow of 1% butane/air. During calcination the alc. probably induces the formation of local structural deformations which are responsible for the increase of activity in butane, but not in 1-butene, selective oxidn. on the catalysts prepd. in an org. solvent as compared with those prepd. by pptn. in an aq. solvent. [on SciFinder(R)]

Nature and mechanism of formation of vanadyl pyrophosphate: active phase in n-butane selective oxidation

CENTI, Gabriele;
1986

Abstract

The prepn. of V-P catalysts from V2O5/H3PO4/benzyl- and iso-Bu alcs. trapped between the layers of the phosphate structure, which provoke disorder disorder in the plane of layer stacking. During the successive calcination, a pseudomorphic (VO)2P2O7 forms with corresponding disorder in the plane of layer stacking. Disorder in this plane influences, the catalytic activity in butane selective oxidn. and the redox properties of the catalyst, both modifying the rate of V(IV) oxidn. to V(V) and the reducibility of the catalyst in a flow of 1% butane/air. During calcination the alc. probably induces the formation of local structural deformations which are responsible for the increase of activity in butane, but not in 1-butene, selective oxidn. on the catalysts prepd. in an org. solvent as compared with those prepd. by pptn. in an aq. solvent. [on SciFinder(R)]
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11570/1907377
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 197
  • ???jsp.display-item.citation.isi??? 186
social impact