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Slip velocity in downer reactors: drag coefficient and the influence of operational variables / Mohammad Ashraful Islam in Industrial & engineering chemistry research, Vol. 49 N° 15 (Août 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 15 (Août 2010) . - pp 6735–6744 Titre : Slip velocity in downer reactors: drag coefficient and the influence of operational variables Type de document : texte imprimé Auteurs : Mohammad Ashraful Islam, Auteur ; Stefan Krol, Auteur ; Hugo I. De Lasa, Auteur Année de publication : 2010 Article en page(s) : pp 6735–6744 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Slip  velocity  Operational  variables. Résumé : Cluster formation in downer reactors is considered a most important factor influencing slip velocity between the flowing phases. This study investigates the formation of clusters using CREC-GS-Optiprobes. This probe is a nonintrusive device that records information from a well-defined optical measuring volume. This probe can provide accurate measurements tracking closely gas−solid flows in downer units. This study shows that cluster drag coefficients can be correlated as function of both Reynolds number and number of particles contained in agglomerates. This yields a close to linear relationship between cluster size and average slip velocity. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901466p [article] Slip velocity in downer reactors: drag coefficient and the influence of operational variables [texte imprimé] / Mohammad Ashraful Islam, Auteur ; Stefan Krol, Auteur ; Hugo I. De Lasa, Auteur . - 2010 . - pp 6735–6744. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 15 (Août 2010) . - pp 6735–6744 Mots-clés : Slip  velocity  Operational  variables. Résumé : Cluster formation in downer reactors is considered a most important factor influencing slip velocity between the flowing phases. This study investigates the formation of clusters using CREC-GS-Optiprobes. This probe is a nonintrusive device that records information from a well-defined optical measuring volume. This probe can provide accurate measurements tracking closely gas−solid flows in downer units. This study shows that cluster drag coefficients can be correlated as function of both Reynolds number and number of particles contained in agglomerates. This yields a close to linear relationship between cluster size and average slip velocity. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901466p