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Sebastien Leveneur
Public Documents
2
A new perspective on vegetable oil epoxidation modeling: reaction and mass transfer i...
Tapio Salmi
and 9 more
July 11, 2021
A rigorous mathematical model was developed for a complex liquid-liquid-solid system in a batch reactor. The approach is general but particularly well applicable for the indirect epoxidation of vegetable oils according to the concept of N. Prileschajew. The model considers intra- and interfacial mass transfer effects coupled to the reaction kinetics. The liquid phases were described with chemical approach (aqueous phase) and a reaction-diffusion approach (oil phase). The oil droplets were treated as rigid spheres, in which the overall reaction rate is influenced by chemical reactions and molecular diffusion phenomena. The model was tested with a generic example, where two reactions proceeded simultaneously in the aqueous and oil phases. The example (i.e. fatty acid epoxidation à la Prileschajew) illustrated the power of the real multiphase model in epoxidation processes. The proposed modelling concept can be used for optimization purposes for many applications, which comprise a complex water-oil-solid catalyst system.
Global sensitivity analysis to identify influential model input on thermal risk param...
Elizabeth GARCIA
and 4 more
June 05, 2020
The influence of the inputs on thermal risk parameters in a chemical reactor is important to know. This knowledge can establish adequate safety barriers. The following thermal risk parameters were studied: the maximum reaction temperature, the temperature rise and the time to reach this reaction maximum temperature. Global sensitivity analysis was proposed as a new perspective to evaluate the influence and the interaction of the inputs on thermal risk parameters. This method was applied to the exothermic system: epoxidation of cottonseed oil by performic acid in semibatch mode under isoperibolic conditions.