The evaluation of nonisothermal thermoanalytical kinetics is simplified without the description of heat transfers, such as thermal inertia, which is not negligible, as indicated by Vyazovkin
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F21%3A00351012" target="_blank" >RIV/68407700:21110/21:00351012 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1002/kin.21495" target="_blank" >https://doi.org/10.1002/kin.21495</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/kin.21495" target="_blank" >10.1002/kin.21495</a>
Alternative languages
Result language
angličtina
Original language name
The evaluation of nonisothermal thermoanalytical kinetics is simplified without the description of heat transfers, such as thermal inertia, which is not negligible, as indicated by Vyazovkin
Original language description
In the field of thermoanalytical kinetics, which is widely used, basic questions arise regarding a possible description of the effect of heat transfer and subsequent thermal inertia. Current practice still uses a simplified interpretation of directly measured data for an inert sample at a constant temperature rise to describe the studied reaction, which leads to a simplified reaction conversion ratio, which is further used for various mathematical processing. The analysis of the introduced rectangular heat pulses and their indication by DTA clearly shows that the effect of thermal inertia is fundamental and not negligible. This is, after all, known from calorimetry, where the integral constant of inertia has historically been used to calibrate the descending temperature, but it cannot generally be applied to the whole temperature process due to its nonlinearity. In the case of parallel processing, for example by gradually increasing the heating rate, the effect of thermal inertia can be partially compensated for each other which have yet to be confirmed. However, for the kinetic analysis of a single peak, it is necessary to adapt to the effect of the thermal delay due to thermal inertia, which, similarly to the measured enthalpy, is tied to the sample size. Of course, it will be up to the researcher to find a solution that also includes the effect of heat transfer and dissipation, which should become the main principle of thermoanalytical methods of the future, as shown by current examples combining thermal processes with their specific kinetics. 2021 Wiley Periodicals LLC
Czech name
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Czech description
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Classification
Type
J<sub>ost</sub> - Miscellaneous article in a specialist periodical
CEP classification
—
OECD FORD branch
20501 - Materials engineering
Result continuities
Project
<a href="/en/project/FV40007" target="_blank" >FV40007: Innovation of the production technology of lightened brick body for thin-walled brick blocks</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
International Journal of Chemical Kinetics
ISSN
0538-8066
e-ISSN
1097-4601
Volume of the periodical
53
Issue of the periodical within the volume
9
Country of publishing house
US - UNITED STATES
Number of pages
8
Pages from-to
1050-1057
UT code for WoS article
000641084800001
EID of the result in the Scopus database
2-s2.0-85104550815