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

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Helisoa Rakotondramaro, Johan Wärnå, Lionel Estel, Tapio Salmi, Sébastien Leveneur
Publication year: 2016
Journal: Journal of Loss Prevention in the Process Industries
Volume number: 43
Start page: 147
End page: 157
eISSN: 1873-3352


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.


Keywords

engineering education

Last updated on 2019-19-11 at 03:32