A microreactor-based system for the study of fast exothermic reactions in liquid phase: characterization of the system

A new system combining a microreactor and a microcalorimetric chip was investigated. The small size of the microreactor channel permits maintaining isothermal conditions necessary for the kinetic characterization of highly exothermic reactions. These conditions are not easily obtained in classical calorimetric systems. The degree of mixing in the microchannel, which plays an important role for the characterization of fast reactions, was determined experimentally using an iodate–iodide system and confirmed by calculations. The calorimetric system was calibrated by performing the neutralization reaction of NaOH with H2SO4 in the microchannel. Several optimizations of the microreactor design allowed to raise the sensitivity of the system and to preheat the entering fluids. The results obtained were repeatable and reproducible. The establishment of the heat balance and the evaluation of the various resistances allowed a better global understanding of the system.


Published in:
Chemical Engineering Journal, 101, 241-250
Year:
2004
Keywords:
Note:
Caractérisation du microréacteur de Marie-Agnès, 1ère génération: diélectrique (parois des canaux) : ESL 4913 verre de scellement : ESL 4026A Cette génération est encore un peu sensible aux agents chimiques très agressifs - ESL 4026A a été remplacé par ESL 4913, qui nécessite alors une température de scellement très élevée, >900C.
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Note: The status of this file is: EPFL only


 Record created 2006-06-22, last modified 2018-01-27

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