Evidence for the participation of lattice nitrogen from vanadium aluminum oxynitrides in propane ammoxidation

Hdl Handle:
http://hdl.handle.net/10149/58364
Title:
Evidence for the participation of lattice nitrogen from vanadium aluminum oxynitrides in propane ammoxidation
Authors:
Olea, M. (Maria); Florea, M.; Sack, I. (Isabelle); Prada Silvy, P.; Gaigneaux, E. M. (Eric); Marin, G. B. (Guy); Grange, P.
Affiliation:
Ghent University. Department of Chemical Engineering. Laboratorium voor Petrochemische Techniek. Belgium; Catholic University of Louvain. Unité de catalyse et chimie des matériaux divisés. Belgium.
Citation:
Olea, M. et al. (2005) 'Evidence for the participation of lattice nitrogen from vanadium aluminum oxynitrides in propane ammoxidation', Journal of Catalysis, 232 (1), pp.152-160.
Publisher:
Elsevier
Journal:
Journal of Catalysis
Issue Date:
May-2005
URI:
http://hdl.handle.net/10149/58364
DOI:
10.1016/j.jcat.2005.02.020
Abstract:
The participation of the nitrogen from the lattice of a series of vanadium aluminum oxynitride catalysts (VAlONs) during propane ammoxidation to acrylonitrile was made evident by temporal analysis of products (TAP) at 773 K in the absence of NH3 and O2. Moreover, the influence of the presence of gaseous oxygen and/or gaseous ammonia on the catalytic performance of this new catalytic material was studied. Propane conversion increases in the presence of O2, but it is not affected by NH3. Propene and acrolein are also formed from propane in the absence of O2 and are intermediates towards acrylonitrile. In the absence of NH3 and O2, the acrylonitrile yield increases with nitrogen content for the same V/Al ratio and decreases with increasing V/Al ratio at constant nitrogen content. Propene yield decreases with nitrogen content and with increasing V/Al ratio. Almost no influence of either nitrogen content or V/Al ratio on the CO2 yield is observed. The presence of oxygen increases the CO2 yield at the expense of acrylonitrile and, even more so, of propene. Ammonia does not influence the product distribution in the absence of O2. The amount of acrolein formed is almost constant, regardless of nitrogen content, V/Al ratio, and reactant mixture, but vanishes when mixed oxides rather then oxynitrides are used. Single-pulse experiments performed with labeled ammonia confirmed the participation of lattice nitrogen in the ammoxidation.
Type:
Article
Keywords:
nitrogen species; vanadium aluminum oxynitrides; acrylonitrile; propane ammoxidation; TAP reactor
ISSN:
1090-2694
Rights:
Author can archive post-print (ie final draft post-refereeing). For full details see http://www.sherpa.ac.uk/romeo/ [Accessed 13/01/2010]
Citation Count:
16 [Scopus, 13/01/2010]

Full metadata record

DC FieldValue Language
dc.contributor.authorOlea, M. (Maria)-
dc.contributor.authorFlorea, M.-
dc.contributor.authorSack, I. (Isabelle)-
dc.contributor.authorPrada Silvy, P.-
dc.contributor.authorGaigneaux, E. M. (Eric)-
dc.contributor.authorMarin, G. B. (Guy)-
dc.contributor.authorGrange, P.-
dc.date.accessioned2009-04-01T10:50:08Z-
dc.date.available2009-04-01T10:50:08Z-
dc.date.issued2005-05-
dc.identifier.citationJournal of Catalysis; 232 (1): 152-160-
dc.identifier.issn1090-2694-
dc.identifier.doi10.1016/j.jcat.2005.02.020-
dc.identifier.urihttp://hdl.handle.net/10149/58364-
dc.description.abstractThe participation of the nitrogen from the lattice of a series of vanadium aluminum oxynitride catalysts (VAlONs) during propane ammoxidation to acrylonitrile was made evident by temporal analysis of products (TAP) at 773 K in the absence of NH3 and O2. Moreover, the influence of the presence of gaseous oxygen and/or gaseous ammonia on the catalytic performance of this new catalytic material was studied. Propane conversion increases in the presence of O2, but it is not affected by NH3. Propene and acrolein are also formed from propane in the absence of O2 and are intermediates towards acrylonitrile. In the absence of NH3 and O2, the acrylonitrile yield increases with nitrogen content for the same V/Al ratio and decreases with increasing V/Al ratio at constant nitrogen content. Propene yield decreases with nitrogen content and with increasing V/Al ratio. Almost no influence of either nitrogen content or V/Al ratio on the CO2 yield is observed. The presence of oxygen increases the CO2 yield at the expense of acrylonitrile and, even more so, of propene. Ammonia does not influence the product distribution in the absence of O2. The amount of acrolein formed is almost constant, regardless of nitrogen content, V/Al ratio, and reactant mixture, but vanishes when mixed oxides rather then oxynitrides are used. Single-pulse experiments performed with labeled ammonia confirmed the participation of lattice nitrogen in the ammoxidation.-
dc.publisherElsevier-
dc.rightsAuthor can archive post-print (ie final draft post-refereeing). For full details see http://www.sherpa.ac.uk/romeo/ [Accessed 13/01/2010]-
dc.subjectnitrogen species-
dc.subjectvanadium aluminum oxynitrides-
dc.subjectacrylonitrile-
dc.subjectpropane ammoxidation-
dc.subjectTAP reactor-
dc.titleEvidence for the participation of lattice nitrogen from vanadium aluminum oxynitrides in propane ammoxidation-
dc.typeArticle-
dc.contributor.departmentGhent University. Department of Chemical Engineering. Laboratorium voor Petrochemische Techniek. Belgium; Catholic University of Louvain. Unité de catalyse et chimie des matériaux divisés. Belgium.-
dc.identifier.journalJournal of Catalysis-
ref.assessmentRAE 2008-
ref.citationcount16 [Scopus, 13/01/2010]-
or.citation.harvardOlea, M. et al. (2005) 'Evidence for the participation of lattice nitrogen from vanadium aluminum oxynitrides in propane ammoxidation', Journal of Catalysis, 232 (1), pp.152-160.-
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