The critical condition for thermal explosion in an isoperibolic system

Knowing the conditions for a system to undergo thermal explosion is of utmost importance for many applications. A critical condition that accounts for reactant consumption and covers most practical situations, including low activation energy reactions is presented. Our solution applies to cylindrica...

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Bibliographic Details
Published in:AIChE journal 2017-09, Vol.63 (9), p.3979-3993
Main Authors: Sánchez‐Rodriguez, Daniel, Farjas, Jordi, Roura, Pere
Format: Article
Language:English
Subjects:
Activation energy
Calorimetria
Calorimetry
Energy consumption
Explosions
Heat balance
Reactors
Thermal runaway
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Summary:Knowing the conditions for a system to undergo thermal explosion is of utmost importance for many applications. A critical condition that accounts for reactant consumption and covers most practical situations, including low activation energy reactions is presented. Our solution applies to cylindrical reactors of any radius to height ratio. In the case of films, it is shown that thermal explosion is virtually impossible. A new criterion to define the boundary of thermal runaway based on heat balance is introduced. This new definition of criticality allows us to check the accuracy of the nonstationary model to describe the critical condition. The nonstationary model is the base of most approaches. © 2017 American Institute of Chemical Engineers AIChE J , 63: 3979–3993, 2017
ISSN:0001-1541
1547-5905
DOI:10.1002/aic.15727