Authors:
D. Ballivet-Tkatchenko UPR 8241 liée par conventions à l’Université Paul Sabatier et á l’institut National Polytechnique de Toulouse Laboratoire de Chmie de Coordination du CNRS 205 Route de Narbonne 31077 Toulouse Cedex France

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G. Delahay UPR 8241 liée par conventions à l’Université Paul Sabatier et á l’institut National Polytechnique de Toulouse Laboratoire de Chmie de Coordination du CNRS 205 Route de Narbonne 31077 Toulouse Cedex France

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Abstract  

Profiles of temperature programmed reduction (TPR) of V2O5 under H2 have been studied through water analysis. This new approach enhances the sensitivity of the method. The influence of experimental parameters on the temperature corresponding to the maximum reduction rate,Tm, has been studied. The hydrogen concentration and heating rate are the two major factors that influenceTm. In our method, the amount of solid and the flow rate are also important factors in monitoring of profile distortions attributed to water condensation at the outlet of the reactor. An approach of the mechanism of reduction of V2O5 has been carried out. The best kinetic model which describes the reduction rocess is the Avrami-Erofeev tridimensional nucleation model.

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
1
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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