Cooling and stirring failure for semi-batch reactor: application to exothermic reactions in multiphase reactor

Helisoa Rakotondramaro, Johan Wärnå, Lionel Estel, Tapio Salmi, Sebastien Leveneur

Research output: Contribution to journalArticleScientificpeer-review

14 Citations (Scopus)

Abstract

Thermal safety assessment for multiple exothermic reaction systems in multiphase reactors is challenging. One of the first step is to determine the presence or absence of secondary reactions producing non-condensable gaseous products. Then, a kinetic and thermal study should be performed to evaluate the value of the heat-flow rates due to chemical reactions. Epoxidation of a free fatty acid by a percarboxylic acid produced in-situ was studied. A classical approach by determining the adiabatic temperature rise (ΔTad) and the time to maximum rate under adiabatic conditions (TMRad) by microcalorimetry was used. Then, different cooling and stirring failure scenarii in a semi-batch lab-scale reactor under isoperibolic mode were performed. It was confirmed that the formation of peroxyformic acid governs the overall reaction kinetics and the reaction temperature. It was confirmed that in case of cooling failure, mechanical agitation should be maintained.
Original languageUndefined/Unknown
Pages (from-to)147–157
JournalJournal of Loss Prevention in the Process Industries
Volume43
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

Keywords

  • engineering education

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