Title :

Control of the crystal morphology of vohpo4 center dot 0. 5h(2)o precursors prepared via light alcohols-assisted solvothermal synthesis and influence on the selective oxidation of n-butane

Author(s) :

Dinh, M. T. Nguyen [Auteur]
Nguyen, T. L. [Auteur]
Phan, M. D. [Auteur]
Dinh, L. Nguyen [Auteur]
Truong, Q. D. [Auteur]
Bordes, Elisabeth [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Journal title :

Journal of Catalysis

Abbreviated title :

J. Catal.

Volume number :

377

Pages :

638-651

Publication date :

2019-09-01

ISSN :

0021-9517

English keyword(s) :

Maleic anhydride
n-butane oxidation
Vanadyl alkyl-phosphate
Solvothermal method
Intercalation
VPO catalysts
VOHPO4 center dot 0.5H(2)O

HAL domain(s) :

Chimie/Catalyse

English abstract : [en]

The catalytic performance of vanadyl pyrophosphate (VPP) catalysts in the oxidation of n-butane to maleic anhydride (MA) depends strongly on the display of the active and selective {0 0 1} faces, that may be controlled ...
Show more >The catalytic performance of vanadyl pyrophosphate (VPP) catalysts in the oxidation of n-butane to maleic anhydride (MA) depends strongly on the display of the active and selective {0 0 1} faces, that may be controlled during the preparation of VOHPO4·0.5H2O precursor by solvothermal technique using C2 to C4 alkanoic alcohols. Intercalated metastable vanadyl-alkyl-phosphates were formed when linear alcohols (ethanol, n-butanol) were used, at variance with iso-alcohols. {0 0 1} platelets of VOHPO4·0.5H2O yielded {2 0 0} platelets to (VO)2P2O7 in nitrogen or in situ in the reactor, as revealed by structural analyses. The catalysts prepared in ethanol or n-butanol in situ activated at 440 °C were more active and selective to MA than in iso-alcohols, but if the equilibration was performed at 380 °C the influence of alcohol was mitigated. The highest MA yield was obtained with the ethanol-derived catalyst, which exhibited the smallest platy crystallites of (VO)2P2O7, as well as surface V5+ species as seen by XPS.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Research team(s) :

Valorisation des alcanes et de la biomasse (VAALBIO)

Submission date :

2022-03-02T07:14:07Z
2024-02-06T18:20:41Z