Batiot, B;
Rogaume, T;
Richard, F;
Luche, J;
Collin, A;
Guillaume, E;
Torero, JL;
(2021)
Origin and justification of the use of the arrhenius relation to represent the reaction rate of the thermal decomposition of a solid.
Applied Sciences
, 11
(9)
, Article 4075. 10.3390/app11094075.
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Abstract
Degradation models are commonly used to describe the generation of combustible gases when predicting fire behavior. A model may include many sub-models, such as heat and mass transfer models, pyrolysis models or mechanical models. The pyrolysis sub-models require the definition of a decomposition mechanism and the associated reaction rates. Arrhenius-type equations are commonly used to quantify the reaction rates. Arrhenius-type equations allow the representation of chemical decomposition as a function of temperature. This representation of the reaction rate originated from the study of gas-phase reactions, but it has been extrapolated to liquid and solid decomposition. Its extension to solid degradation needs to be justified because using an Arrhenius-type formulation implies important simplifications that are potentially questionable. This study describes these simplifications and their potential consequences when it comes to the quantification of solid-phase reaction rates. Furthermore, a critical analysis of the existing thermal degradation models is presented to evaluate the implications of using an Arrhenius-type equation to quantify mass-loss rates and gaseous fuel production for fire predictions.
| Type: | Article |
|---|---|
| Title: | Origin and justification of the use of the arrhenius relation to represent the reaction rate of the thermal decomposition of a solid |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3390/app11094075 |
| Publisher version: | http://dx.doi.org/10.3390/app11094075 |
| Language: | English |
| Additional information: | This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
| Keywords: | Arrhenius; solid kinetics; thermal degradation; modeling |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10128482 |
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