Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 37: Issue 2
A general differential technique for the determination of parameters for d(α)/dt=f(α)A exp (−E/RT)
Energy of activation, preexponential factor and order of reaction (when applicable)
Author:
J. H. Flynn Scientific Thermal Research and Data Analysis (STRDA) 5309 Iroquois Road 20816 Bethesda Maryland USA

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Pages:
293–305
Online Publication Date:
13 Aug 2005
Publication Date:
01 Feb 1991
Article Category:
Research Article
DOI:
https://doi.org/10.1007/bf02055932
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A general differential method is developed and described which determines the Arrhenius parameters, energy of activation and the preexponential factor, as functions of degree of conversion from sets of two or more experiments with differing thermal programs. (These experiments may be performed at any combination of isothermal, constant heating rate or other temperature programs.) The method tests to see whether or not the kinetics follow the equation,f(α)=(1−α)n, and calculates the correct reaction order, n, when such an equation is applicable. The correct energy of activation,E, is determined as a function of both temperature and conversion. The correct preexponential term,A, is calculated for all cases described by equation, d(α)/dt=f (α) A exp(−E/RT), except for the ‘autocatalytic’ case in whichf(α)=0)=0. Calculation of parameters for equations involving other functions forf(α) will be described in a subsequent paper.

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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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