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The critical conditions for thermal explosion in a system heated at a constant rate

We have analyzed the condition needed for thermal explosion to occur in a solid sample when the tem- perature of the vessel walls is raised at a constant rate. We have developed a dimensionless model that allows its direct comparison with an isoperibolic system (constant vessel wall temperature). We have obtained an analytical expression for the critical condition as a function of the system parameters. Our solution takes into account reactant consumption and covers different geometries: thin film, finite and infinite cylinder. The critical condition has been validated with numerical simulations and experiments. We show that, compared to the isoperibolic system, thermal explosion is a little bit more difficult to achieve under constant heating conditions. Besides, we show that thermal explosion on submicrometric films is nearly impossible

Author: Sánchez-Rodríguez, Daniel
Farjas Silva, Jordi
Roura Grabulosa, Pere
Date: 2018 June 5
Abstract: We have analyzed the condition needed for thermal explosion to occur in a solid sample when the tem- perature of the vessel walls is raised at a constant rate. We have developed a dimensionless model that allows its direct comparison with an isoperibolic system (constant vessel wall temperature). We have obtained an analytical expression for the critical condition as a function of the system parameters. Our solution takes into account reactant consumption and covers different geometries: thin film, finite and infinite cylinder. The critical condition has been validated with numerical simulations and experiments. We show that, compared to the isoperibolic system, thermal explosion is a little bit more difficult to achieve under constant heating conditions. Besides, we show that thermal explosion on submicrometric films is nearly impossible
Document access: http://hdl.handle.net/2072/319763
Language: eng
Rights: Tots els drets reservats
Subject: Calorimetria
Calorimetry
Combustió
Combustion
Title: The critical conditions for thermal explosion in a system heated at a constant rate
Type: info:eu-repo/semantics/article
Repository: Recercat

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