Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 44: Issue 5
Effect of rare earth oxides on the thermal decomposition of barium oxalate
Authors:
S. Bose Utkal University Department of Chemistry 751 004 Bhubaneswar India

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K. Sahu Utkal University Department of Chemistry 751 004 Bhubaneswar India

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D. Bhatta Utkal University Department of Chemistry 751 004 Bhubaneswar India

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Pages:
1131–1136
Online Publication Date:
09 Jan 2007
Publication Date:
01 May 1995
Article Category:
Research Article
DOI:
https://doi.org/10.1007/bf02547542
Keywords:
barium oxalate; catalytic activity; rare earth oxides
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Abstract  

Catalytic activity of rare earth oxides (REO); La2O3, Sm2O3, Gd2O3 and Ce2O3 on the isothermal decomposition of barium oxalate has been studied at 723 K. The α−t plots for pure salt as well as mixtures indicate that the process follows: initial gas evolution, a short acceleratory and a long decay stages. The results of the kinetic analysis show that Prout-Tompkins relationship and two-dimensional phase boundary reaction give best fit of the data for both pure salt as well as mixtures. The rate constants of acceleratory and decay periods are enhanced remarkably by adding REO admixtures and their catalytical activity is in the order La2O3>Sm2O3>Gd2O3 >Ce2O3. The plausible mechanism of decomposition and the role of admixture there on has been discussed in the light of electron transfer process.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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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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