Doubts on Kissinger´s method of kinetic evaluation based on several conceptual models showing the difference between the maximum of reaction rate and the extreme of a DTA peak
The famous Kissinger's kinetic evaluation method (Anal. Chem. 1957) is examined with respect to the feasible impact of the individual quantities and assumptions involved, namely the model of reaction mechanism, f(a) (with the iso- and nonisothermal degrees of conversion, α and λ) the r...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Technical Faculty, Bor
2014-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2014/1450-53391400006S.pdf |
| _version_ | 1819265548726304768 |
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| author | Šesták J. Holba P. Živković Ž. |
| author_facet | Šesták J. Holba P. Živković Ž. |
| author_sort | Šesták J. |
| collection | DOAJ |
| description | The famous Kissinger's kinetic evaluation method (Anal. Chem. 1957) is
examined with respect to the feasible impact of the individual quantities
and assumptions involved, namely the model of reaction mechanism, f(a) (with
the iso- and nonisothermal degrees of conversion, α and λ) the rate
constant, k(T) (and associated activation energy, E), heating/cooling rate,
b (supplementing additional thermodynamic term for the melt undercooling,
ΔT) and above all, the association of the characteristic temperature, Tm,
with the DTA peak apex. It is shown that the Kissinger/s equation, in
contrary to the results of Vold (Anal. Chem. 1949), is omitting the term of
heat inertia arising from the true balance of heat fluxes. The absence of
this term skews the evaluated values of activation energies. |
| first_indexed | 2024-12-23T20:47:08Z |
| format | Article |
| id | doaj.art-e8ffa55c27594e658cecbf1e899163b0 |
| institution | Directory Open Access Journal |
| issn | 1450-5339 |
| language | English |
| last_indexed | 2024-12-23T20:47:08Z |
| publishDate | 2014-01-01 |
| publisher | Technical Faculty, Bor |
| record_format | Article |
| series | Journal of Mining and Metallurgy. Section B: Metallurgy |
| spelling | doaj.art-e8ffa55c27594e658cecbf1e899163b02022-12-21T17:31:46ZengTechnical Faculty, BorJournal of Mining and Metallurgy. Section B: Metallurgy1450-53392014-01-01501778110.2298/JMMB130902006S1450-53391400006SDoubts on Kissinger´s method of kinetic evaluation based on several conceptual models showing the difference between the maximum of reaction rate and the extreme of a DTA peakŠesták J.0Holba P.1Živković Ž.2University of West Bohemia in Pilsen (NTC-ZČU), New Technologies - Research Centre of the Westbohemian Region, Plzeň, Czech republicUniversity of West Bohemia in Pilsen (NTC-ZČU), New Technologies - Research Centre of the Westbohemian Region, Plzeň, Czech republicTechnical Faculty, BorThe famous Kissinger's kinetic evaluation method (Anal. Chem. 1957) is examined with respect to the feasible impact of the individual quantities and assumptions involved, namely the model of reaction mechanism, f(a) (with the iso- and nonisothermal degrees of conversion, α and λ) the rate constant, k(T) (and associated activation energy, E), heating/cooling rate, b (supplementing additional thermodynamic term for the melt undercooling, ΔT) and above all, the association of the characteristic temperature, Tm, with the DTA peak apex. It is shown that the Kissinger/s equation, in contrary to the results of Vold (Anal. Chem. 1949), is omitting the term of heat inertia arising from the true balance of heat fluxes. The absence of this term skews the evaluated values of activation energies.http://www.doiserbia.nb.rs/img/doi/1450-5339/2014/1450-53391400006S.pdfnema |
| spellingShingle | Šesták J. Holba P. Živković Ž. Doubts on Kissinger´s method of kinetic evaluation based on several conceptual models showing the difference between the maximum of reaction rate and the extreme of a DTA peak Journal of Mining and Metallurgy. Section B: Metallurgy nema |
| title | Doubts on Kissinger´s method of kinetic evaluation based on several conceptual models showing the difference between the maximum of reaction rate and the extreme of a DTA peak |
| title_full | Doubts on Kissinger´s method of kinetic evaluation based on several conceptual models showing the difference between the maximum of reaction rate and the extreme of a DTA peak |
| title_fullStr | Doubts on Kissinger´s method of kinetic evaluation based on several conceptual models showing the difference between the maximum of reaction rate and the extreme of a DTA peak |
| title_full_unstemmed | Doubts on Kissinger´s method of kinetic evaluation based on several conceptual models showing the difference between the maximum of reaction rate and the extreme of a DTA peak |
| title_short | Doubts on Kissinger´s method of kinetic evaluation based on several conceptual models showing the difference between the maximum of reaction rate and the extreme of a DTA peak |
| title_sort | doubts on kissinger´s method of kinetic evaluation based on several conceptual models showing the difference between the maximum of reaction rate and the extreme of a dta peak |
| topic | nema |
| url | http://www.doiserbia.nb.rs/img/doi/1450-5339/2014/1450-53391400006S.pdf |
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