Kinetic modeling of the reoxidation of vanadia-based catalysts

Hdl Handle:
http://hdl.handle.net/10149/98956
Title:
Kinetic modeling of the reoxidation of vanadia-based catalysts
Authors:
Sack, I. (Isabelle); Balcaen, V. (Veerle); Olea, M. (Maria); Poelman, H. (Hilde); Marin, G. B. (Guy)
Affiliation:
Ghent University. Department of Chemical Engineering. Laboratorium voor Petrochemische Techniek.
Citation:
Sack, I. et. al. (2006) 'Kinetic modeling of the reoxidation of vanadia-based catalysts', First conference of the European Union coordination action "CO-ordination of nanostructured catalytic oxides research and development in Europe - CONCORDE": Understanding the dynamic and transient behaviour of catalysts in working conditions and the relationships with catalytic performance, Louvain-la-Neuve, Belgium, January 26 - 28, 2005 in Catalysis Today, 112 (1-4), pp.68-72.
Publisher:
Elsevier
Journal:
Catalysis Today
Conference:
First conference of the European Union coordination action "CO-ordination of nanostructured catalytic oxides research and development in Europe - CONCORDE": Understanding the dynamic and transient behaviour of catalysts in working conditions and the relationships with catalytic performance, Louvain-la-Neuve, Belgium, January 26 - 28, 2005
Issue Date:
15-Feb-2006
URI:
http://hdl.handle.net/10149/98956
DOI:
10.1016/j.cattod.2005.11.030
Abstract:
The reoxidation kinetics of classical vanadia-based EL10V Eurocat catalysts are compared with those obtained on a new catalytic material, prepared by DC magnetron sputtering, by means of temporal analysis of products (TAP) at reduction and reoxidation temperatures from 723 to 823 K. After reduction to different degrees of reduction with multipulses of propane, the kinetics of reoxidation were obtained from single-pulse experiments. Irreversible dissociative chemisorption of di-oxygen allowed to describe the latter over the full range of investigated conditions for EL10V1 with a single pre-exponential factor, A = 4.05 × 102 kgVm3/mol2 s, and a single activation energy, Ea = 33.41 kJ/mol. In the case of the sputtered catalysts, investigated at 773 K only, a single rate coefficient also describes the reoxidation at different degrees of reduction for every V-loading. Its value increases with increasing V-loading up to a constant value of 1.09 ± 0.11 kgVm3/mol2 s, but remains lower than the corresponding rate coefficient for the reoxidation for EL10V8 which amounts to 13.30 kgVm3/mol2 s.
Type:
Article; Meetings and Proceedings
Language:
en
Keywords:
vanadia-based catalysts; reoxidation; kinetic modelling; TAP
ISSN:
0920-5861
Rights:
Author can archive post-print (ie final draft post-refereeing). For full details see http://www.sherpa.ac.uk/romeo/ [Accessed 17/05/2010]
Citation Count:
0 [Web of Science and Scopus 17/05/2010]

Full metadata record

DC FieldValue Language
dc.contributor.authorSack, I. (Isabelle)en
dc.contributor.authorBalcaen, V. (Veerle)en
dc.contributor.authorOlea, M. (Maria)en
dc.contributor.authorPoelman, H. (Hilde)en
dc.contributor.authorMarin, G. B. (Guy)en
dc.date.accessioned2010-05-17T08:34:53Z-
dc.date.available2010-05-17T08:34:53Z-
dc.date.issued2006-02-15-
dc.identifier.citationCatalysis Today; 112(1-4):68-72en
dc.identifier.issn0920-5861-
dc.identifier.doi10.1016/j.cattod.2005.11.030-
dc.identifier.urihttp://hdl.handle.net/10149/98956-
dc.description.abstractThe reoxidation kinetics of classical vanadia-based EL10V Eurocat catalysts are compared with those obtained on a new catalytic material, prepared by DC magnetron sputtering, by means of temporal analysis of products (TAP) at reduction and reoxidation temperatures from 723 to 823 K. After reduction to different degrees of reduction with multipulses of propane, the kinetics of reoxidation were obtained from single-pulse experiments. Irreversible dissociative chemisorption of di-oxygen allowed to describe the latter over the full range of investigated conditions for EL10V1 with a single pre-exponential factor, A = 4.05 × 102 kgVm3/mol2 s, and a single activation energy, Ea = 33.41 kJ/mol. In the case of the sputtered catalysts, investigated at 773 K only, a single rate coefficient also describes the reoxidation at different degrees of reduction for every V-loading. Its value increases with increasing V-loading up to a constant value of 1.09 ± 0.11 kgVm3/mol2 s, but remains lower than the corresponding rate coefficient for the reoxidation for EL10V8 which amounts to 13.30 kgVm3/mol2 s.en
dc.language.isoenen
dc.publisherElsevieren
dc.rightsAuthor can archive post-print (ie final draft post-refereeing). For full details see http://www.sherpa.ac.uk/romeo/ [Accessed 17/05/2010]en
dc.subjectvanadia-based catalystsen
dc.subjectreoxidationen
dc.subjectkinetic modellingen
dc.subjectTAPen
dc.titleKinetic modeling of the reoxidation of vanadia-based catalystsen
dc.typeArticleen
dc.typeMeetings and Proceedingsen
dc.contributor.departmentGhent University. Department of Chemical Engineering. Laboratorium voor Petrochemische Techniek.en
dc.identifier.journalCatalysis Todayen
dc.identifier.conferenceFirst conference of the European Union coordination action "CO-ordination of nanostructured catalytic oxides research and development in Europe - CONCORDE": Understanding the dynamic and transient behaviour of catalysts in working conditions and the relationships with catalytic performance, Louvain-la-Neuve, Belgium, January 26 - 28, 2005en
ref.citationcount0 [Web of Science and Scopus 17/05/2010]en
or.citation.harvardSack, I. et. al. (2006) 'Kinetic modeling of the reoxidation of vanadia-based catalysts', First conference of the European Union coordination action "CO-ordination of nanostructured catalytic oxides research and development in Europe - CONCORDE": Understanding the dynamic and transient behaviour of catalysts in working conditions and the relationships with catalytic performance, Louvain-la-Neuve, Belgium, January 26 - 28, 2005 in Catalysis Today, 112 (1-4), pp.68-72.-
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