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Helical and Lemniscate Tubular Reactors / Charles G. Slominski in Industrial & engineering chemistry research, Vol. 50 N° 15 (Août 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 15 (Août 2011) . - pp. 8842–8850 Titre : Helical and Lemniscate Tubular Reactors Type de document : texte imprimé Auteurs : Charles G. Slominski, Auteur ; Warren D. Seider, Auteur ; Stuart W. Churchill, Auteur Année de publication : 2011 Article en page(s) : pp. 8842–8850 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Tubular  reactor Résumé : Introducing curvature in a tubular reactor generates a secondary fluid motion that decreases the variance of the residence-time-distribution of the fluid elements. The conversion is thereby increased with respect to that of a straight tube, and in the extreme approaches the maximum corresponding to perfect radial mixing, which is the same as that for the hypothetical case of plug flow. Helically coiled tubes are widely used as reactors in industry, but experimental data and theoretical solutions are limited in number and scope. The fluid motion and conversion as determined by finite-element solutions using COMSOL is delineated more clearly than in prior studies for helical tubes and is also applied for a lemniscate tube (a figure-eight shape). Coiled tubes, lemniscate tubes, and other such configurations are designed to decrease the variance of the residence-time distribution of the fluid elements at the expense of a minimal increase in the pressure drop. The decrease in the variance of the residence-time distribution results in a reduction in the reactor length for a specified chemical conversion and thus in the floor space required to achieve a particular conversion. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24395830 [article] Helical and Lemniscate Tubular Reactors [texte imprimé] / Charles G. Slominski, Auteur ; Warren D. Seider, Auteur ; Stuart W. Churchill, Auteur . - 2011 . - pp. 8842–8850. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 15 (Août 2011) . - pp. 8842–8850 Mots-clés : Tubular  reactor Résumé : Introducing curvature in a tubular reactor generates a secondary fluid motion that decreases the variance of the residence-time-distribution of the fluid elements. The conversion is thereby increased with respect to that of a straight tube, and in the extreme approaches the maximum corresponding to perfect radial mixing, which is the same as that for the hypothetical case of plug flow. Helically coiled tubes are widely used as reactors in industry, but experimental data and theoretical solutions are limited in number and scope. The fluid motion and conversion as determined by finite-element solutions using COMSOL is delineated more clearly than in prior studies for helical tubes and is also applied for a lemniscate tube (a figure-eight shape). Coiled tubes, lemniscate tubes, and other such configurations are designed to decrease the variance of the residence-time distribution of the fluid elements at the expense of a minimal increase in the pressure drop. The decrease in the variance of the residence-time distribution results in a reduction in the reactor length for a specified chemical conversion and thus in the floor space required to achieve a particular conversion. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24395830