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Discrete equilibrium data from dynamic column breakthrough experiments / Reza Haghpanah in Industrial & engineering chemistry research, Vol. 51 N° 45 (Novembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 45 (Novembre 2012) . - pp. 14834-14844 Titre : Discrete equilibrium data from dynamic column breakthrough experiments Type de document : texte imprimé Auteurs : Reza Haghpanah, Auteur ; Arvind Rajendran, Auteur ; Shamsuzzaman Farooq, Auteur Année de publication : 2013 Article en page(s) : pp. 14834-14844 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Isotherm  Discrete  equilibrium  data Résumé : A new method for extracting discrete equilibrium data from a set of dynamic column breakthrough experiments is described. Instead of the classical approach where an isotherm model, i.e., a function, is used to describe the equilibrium, this approach represents the isotherm as a set of discrete points. For a given set of discrete fluid phase concentrations, an optimization method is used to determine the corresponding solid loadings that lead to the best-fit prediction of the experimental breakthrough profile. In this work, we develop the algorithm and validate it using single-component case studies, for a variety of isotherm shapes. The practical use of the method is demonstrated by applying it to experimentally measured breakthrough profiles taken from the literature. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3015457 [article] Discrete equilibrium data from dynamic column breakthrough experiments [texte imprimé] / Reza Haghpanah, Auteur ; Arvind Rajendran, Auteur ; Shamsuzzaman Farooq, Auteur . - 2013 . - pp. 14834-14844. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 45 (Novembre 2012) . - pp. 14834-14844 Mots-clés : Isotherm  Discrete  equilibrium  data Résumé : A new method for extracting discrete equilibrium data from a set of dynamic column breakthrough experiments is described. Instead of the classical approach where an isotherm model, i.e., a function, is used to describe the equilibrium, this approach represents the isotherm as a set of discrete points. For a given set of discrete fluid phase concentrations, an optimization method is used to determine the corresponding solid loadings that lead to the best-fit prediction of the experimental breakthrough profile. In this work, we develop the algorithm and validate it using single-component case studies, for a variety of isotherm shapes. The practical use of the method is demonstrated by applying it to experimentally measured breakthrough profiles taken from the literature. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3015457

Synthesis of Ni - SiO2/silicalite -1 core - shell micromembrane reactors and their reaction / diffusion performance / Easir A. Khan in Industrial & engineering chemistry research, Vol. 49 N° 24 (Décembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 24 (Décembre 2010) . - pp. 12423-12428 Titre : Synthesis of Ni - SiO2/silicalite -1 core - shell micromembrane reactors and their reaction / diffusion performance Type de document : texte imprimé Auteurs : Easir A. Khan, Auteur ; Arvind Rajendran, Auteur ; Zhiping Lai, Auteur Année de publication : 2011 Article en page(s) : pp. 12423-12428 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Diffusion  Reactor Résumé : Core—shell micromembrane reactors are a novel class of materials where a catalyst and a shape-selective membrane are synergistically housed in a single particle. In this work, we report the synthesis of micrometer -sized core-shell particles containing a catalyst core and a thin permselective zeolite shell and their application as a micromembrane reactor for the selective hydrogenation of the 1-hexene and 3,3-dimethyl-1-butene isomers. The bare catalyst, which is made from porous silica loaded with catalytically active nickel, showed no reactant selectivity between hexene isomers, but the core-shell particles showed high selectivities up to 300 for a 1-hexene conversion of 90%. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23691996 [article] Synthesis of Ni - SiO2/silicalite -1 core - shell micromembrane reactors and their reaction / diffusion performance [texte imprimé] / Easir A. Khan, Auteur ; Arvind Rajendran, Auteur ; Zhiping Lai, Auteur . - 2011 . - pp. 12423-12428. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 24 (Décembre 2010) . - pp. 12423-12428 Mots-clés : Diffusion  Reactor Résumé : Core—shell micromembrane reactors are a novel class of materials where a catalyst and a shape-selective membrane are synergistically housed in a single particle. In this work, we report the synthesis of micrometer -sized core-shell particles containing a catalyst core and a thin permselective zeolite shell and their application as a micromembrane reactor for the selective hydrogenation of the 1-hexene and 3,3-dimethyl-1-butene isomers. The bare catalyst, which is made from porous silica loaded with catalytically active nickel, showed no reactant selectivity between hexene isomers, but the core-shell particles showed high selectivities up to 300 for a 1-hexene conversion of 90%. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23691996