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Characterization of the hydrodynamics and mixing performance of a split - and - recombination (SAR) prototype microreactor and a multilamination commercial microreactor / Lionel S. Méndez-Portillo in Industrial & engineering chemistry research, Vol. 51 N° 2 (Janvier 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 2 (Janvier 2012) . - pp. 994-1005 Titre : Characterization of the hydrodynamics and mixing performance of a split - and - recombination (SAR) prototype microreactor and a multilamination commercial microreactor Type de document : texte imprimé Auteurs : Lionel S. Méndez-Portillo, Auteur ; Louis Fradette, Auteur ; Charles Dubois, Auteur Année de publication : 2012 Article en page(s) : pp. 994-1005 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Microreactor  Mixing  Hydrodynamics Résumé : The aim of this work was to quantify the performance of two well-known mixing mechanisms used in microreactors: the split-and-recombination (SAR) and the multilamination by means of an interdigital structure. The residence time distribution (RTD) and the mixing performance in laminar flow regime were experimentally characterized by the tracer pulse-input technique and the iodide-iodate Villermaux/Dushman method. RTD analysis indicates bypassing caused by uneven flow distribution in the manifolds of both microreactors. A decrease of the quadratic dependence of axial dispersion on fluid velocity is produced by the improved tracer homogenization achieved in the microfluidic structures. The iodide-iodate method shows that below a critical Damköhler number the microreactors exhibit a superior mixing performance than a conventional T-junction. The interdigital microreactor displayed the best mixing capabilities for all the flow conditions investigated. However, the estimation of energy dissipation confirms that the improved mixing performance of the interdigital unit is obtained at the expense of greater energy expenditure when compared with the split-and-recombination microreactor. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25476432 [article] Characterization of the hydrodynamics and mixing performance of a split - and - recombination (SAR) prototype microreactor and a multilamination commercial microreactor [texte imprimé] / Lionel S. Méndez-Portillo, Auteur ; Louis Fradette, Auteur ; Charles Dubois, Auteur . - 2012 . - pp. 994-1005. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 2 (Janvier 2012) . - pp. 994-1005 Mots-clés : Microreactor  Mixing  Hydrodynamics Résumé : The aim of this work was to quantify the performance of two well-known mixing mechanisms used in microreactors: the split-and-recombination (SAR) and the multilamination by means of an interdigital structure. The residence time distribution (RTD) and the mixing performance in laminar flow regime were experimentally characterized by the tracer pulse-input technique and the iodide-iodate Villermaux/Dushman method. RTD analysis indicates bypassing caused by uneven flow distribution in the manifolds of both microreactors. A decrease of the quadratic dependence of axial dispersion on fluid velocity is produced by the improved tracer homogenization achieved in the microfluidic structures. The iodide-iodate method shows that below a critical Damköhler number the microreactors exhibit a superior mixing performance than a conventional T-junction. The interdigital microreactor displayed the best mixing capabilities for all the flow conditions investigated. However, the estimation of energy dissipation confirms that the improved mixing performance of the interdigital unit is obtained at the expense of greater energy expenditure when compared with the split-and-recombination microreactor. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25476432