Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 60: Issue 2
A Differential Method Which Uses Local Heating Rates to Evaluate Non-isothermal Kinetic Parameters
Authors:
E. Urbanovici LACECA Research Centre Str. Siret Nr. 95 78308 Bucharest Romania Str. Siret Nr. 95 78308 Bucharest Romania

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C. Popescu LACECA Research Centre Str. Siret Nr. 95 78308 Bucharest Romania Str. Siret Nr. 95 78308 Bucharest Romania

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E. Segal University of Bucharest Department of Physical Chemistry, Faculty of Chemistry Bd. Elisabeta 4-12 Bucharest Romania Bd. Elisabeta 4-12 Bucharest Romania

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Pages:
581–594
Online Publication Date:
16 Aug 2006
Publication Date:
01 May 2000
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1010103206986
Keywords:
differential method; evaluation of kinetic parameters; local heating rate; non-isothermal kinetics
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Abstract  

A differential method is proposed which uses local heating rates to evaluate non-isothermal kinetic parameters. The method allows to study the influence of the deviation of the true heating rate with respect to the programmed one on the values of the kinetic parameters. For application, the kinetic parameters of the following solid-gas decomposition reaction were evaluated: [Ni(NH3)6]Br2(s)→[Ni(NH3)2]Br2(s)+4NH3(g). The results obtained revealed significant differences between the values of the non-isothermal kinetic parameters obtained by using local heating rates and those obtained by using the programmed heating rate. It was also demonstrated that the kinetic equation which makes use of the local heating rates permits a better description of the experimental (α, t) data than the kinetic equation which uses the programmed constant heating rate.

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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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