The mathematical incorrectness of the integral isoconversional methods in case of variable activation energy and the consequences

Šimon, P; Thomas, P; Dubaj, T; Cibulková, Z; Peller, A; Veverka, M

The mathematical incorrectness of the integral isoconversional methods in case of variable activation energy and the consequences

Šimon, P Thomas, P

Dubaj, T Cibulková, Z Peller, A Veverka, M

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Publication Type:: Journal Article
Citation:: Journal of Thermal Analysis and Calorimetry, 2014, 115 (1), pp. 853 - 859
Issue Date:: 2014-01-01

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Field	Value	Language
dc.contributor.author	Šimon, P	en_US
dc.contributor.author	Thomas, P https://orcid.org/0000-0001-6962-2121	en_US
dc.contributor.author	Dubaj, T	en_US
dc.contributor.author	Cibulková, Z	en_US
dc.contributor.author	Peller, A	en_US
dc.contributor.author	Veverka, M	en_US
dc.date.issued	2014-01-01	en_US
dc.identifier.citation	Journal of Thermal Analysis and Calorimetry, 2014, 115 (1), pp. 853 - 859	en_US
dc.identifier.issn	1388-6150	en_US
dc.identifier.uri	http://hdl.handle.net/10453/122502
dc.description.abstract	Kinetic parameters resulting from the application of isoconversional methods mostly depend on the degree of conversion. This paper shows that the integral isoconversional methods are mathematically incorrect if the activation energy depends on conversion. In this case, the incorrectness resides in improper separation of variables in the general rate equation. As a consequence, non-sensical snake-like shape of the conversion versus time curves is observed when the kinetic results are extrapolated to lower temperatures. © 2013 Akadémiai Kiadó, Budapest, Hungary.	en_US
dc.relation.ispartof	Journal of Thermal Analysis and Calorimetry	en_US
dc.relation.isbasedon	10.1007/s10973-013-3459-7	en_US
dc.subject.classification	Physical Chemistry	en_US
dc.title	The mathematical incorrectness of the integral isoconversional methods in case of variable activation energy and the consequences	en_US
dc.type	Journal Article
utslib.citation.volume	1	en_US
utslib.citation.volume	115	en_US
utslib.for	0303 Macromolecular and Materials Chemistry	en_US
utslib.for	0306 Physical Chemistry (incl. Structural)	en_US
utslib.for	0399 Other Chemical Sciences	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	open_access
pubs.issue	1	en_US
pubs.publication-status	Published	en_US
pubs.volume	115	en_US

Abstract:

Kinetic parameters resulting from the application of isoconversional methods mostly depend on the degree of conversion. This paper shows that the integral isoconversional methods are mathematically incorrect if the activation energy depends on conversion. In this case, the incorrectness resides in improper separation of variables in the general rate equation. As a consequence, non-sensical snake-like shape of the conversion versus time curves is observed when the kinetic results are extrapolated to lower temperatures. © 2013 Akadémiai Kiadó, Budapest, Hungary.

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http://hdl.handle.net/10453/122502