Modeling of the venting of an untempered system under runaway conditions

Valeria Casson Moreno, Rym Kanes, Jill Wilday, Luc Vechot

Research output: Contribution to journalArticle

5 Citations (Scopus)


The prediction of the consequences of a runaway reaction in terms of temperature and pressure evolution in a reactor requires the knowledge of the reaction kinetics, thermodynamics and fluid dynamics inside the vessel during venting. Such phenomena and their interaction are complex and yet to be fully understood, especially reactions where the pressure generation is totally or partially due to the production of permanent gases (gassy or hybrid systems). Moreover, these phenomena cannot be easily determined by laboratory scale experiments. In this paper, a dynamic model developed to simulate the behavior of an untempered reacting mixture during venting is presented. The model provides the temperature, pressure and mass inventory profiles before and during venting. A sensitivity study of the model was performed. This modeling work provides some insight regarding the interpretation of the data obtained from untempered system venting experiments. The outcome of this work contribute to improving the design of emergency relief systems for hybrid and gassy systems, where significant progress is still to be made in the experimental and modeling areas.

Original languageEnglish
Pages (from-to)171-182
Number of pages12
JournalJournal of Loss Prevention in the Process Industries
Publication statusPublished - 1 Jul 2015



  • Cumene hydroperoxide
  • Dynamic modeling
  • Organic peroxide decomposition
  • Runaway reaction
  • Untempered system
  • Vent sizing

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Food Science
  • Chemical Engineering(all)
  • Safety, Risk, Reliability and Quality
  • Energy Engineering and Power Technology
  • Management Science and Operations Research
  • Industrial and Manufacturing Engineering

Cite this