A microreactor-based system for the study of fast exothermic reactions in liquid phase: characterization of the system
| Autor: | Peter Ryser, Francis Stoessel, Thomas Maeder, Marie-Agnès Schneider |
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| Rok vydání: | 2004 |
| Předmět: |
scellement verre
assembly Exothermic reaction General Chemical Engineering Microfluidics microfluidics Mixing (process engineering) Analytical chemistry microcalorimeter microreactor Industrial and Manufacturing Engineering Isothermal process chemical stability assemblage fluidique Environmental Chemistry Thick film technology Fluidics microcalorimètre Microchannel IMRET Chemistry General Chemistry stabilité chimique technologie hybride Chemical engineering glass sealing technologie des couches epaisses exothermal reactions microréacteur microfluidique Microreactor réactions exothermiques thick-film technology fluidics |
| Zdroj: | Chemical Engineering Journal. 101:241-250 |
| ISSN: | 1385-8947 |
| DOI: | 10.1016/j.cej.2003.11.005 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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