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Determination of adsorption and kinetic parameters for transesterification of methyl acetate with hexanol catalyzed by ion exchange resin / Emine Sert in Industrial & engineering chemistry research, Vol. 51 N° 18 (Mai 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 18 (Mai 2012) . - pp. 6340-6349 Titre : Determination of adsorption and kinetic parameters for transesterification of methyl acetate with hexanol catalyzed by ion exchange resin Type de document : texte imprimé Auteurs : Emine Sert, Auteur ; Ferhan Sami Atalay, Auteur Année de publication : 2012 Article en page(s) : pp. 6340-6349 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Ion  exchange  resin  Catalytic  reaction  Transesterification  Kinetic  parameter  Adsorption Résumé : The transesterification of methyl acetate and 1-hexanol catalyzed by the cation exchange resin Amberlyst-131 was studied to obtain optimum operating parameters, adsorption parameters, and kinetic parameters. The effects of temperature, molar ratio of ester to alcohol, stirrer speed, and catalyst loading on the reaction rate were investigated. The chemical equilibrium constants were obtained from kinetic experiments and theoretically from standard thermodynamic properties at temperatures of 333, 338, 343, and 348 K. The experimental data were tested with the pseudohomogeneous and adsorption based models. The activity coefficients were estimated using UNIQUAC to account for the nonideal thermodynamic behavior of reactants and products for both models. The activation energy for the transesterification reaction was found to be 37.8 kJ mol―1 by the Langmuir―Hinshelwood―Haugen―Watson (LHHW) model, which correlates the experimental data. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25867285 [article] Determination of adsorption and kinetic parameters for transesterification of methyl acetate with hexanol catalyzed by ion exchange resin [texte imprimé] / Emine Sert, Auteur ; Ferhan Sami Atalay, Auteur . - 2012 . - pp. 6340-6349. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 18 (Mai 2012) . - pp. 6340-6349 Mots-clés : Ion  exchange  resin  Catalytic  reaction  Transesterification  Kinetic  parameter  Adsorption Résumé : The transesterification of methyl acetate and 1-hexanol catalyzed by the cation exchange resin Amberlyst-131 was studied to obtain optimum operating parameters, adsorption parameters, and kinetic parameters. The effects of temperature, molar ratio of ester to alcohol, stirrer speed, and catalyst loading on the reaction rate were investigated. The chemical equilibrium constants were obtained from kinetic experiments and theoretically from standard thermodynamic properties at temperatures of 333, 338, 343, and 348 K. The experimental data were tested with the pseudohomogeneous and adsorption based models. The activity coefficients were estimated using UNIQUAC to account for the nonideal thermodynamic behavior of reactants and products for both models. The activation energy for the transesterification reaction was found to be 37.8 kJ mol―1 by the Langmuir―Hinshelwood―Haugen―Watson (LHHW) model, which correlates the experimental data. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25867285

Esterification of acrylic acid with different alcohols catalyzed by zirconia supported tungstophosphoric acid / Emine Sert in Industrial & engineering chemistry research, Vol. 51 N° 19 (Mai 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 19 (Mai 2012) . - pp. 6666-6671 Titre : Esterification of acrylic acid with different alcohols catalyzed by zirconia supported tungstophosphoric acid Type de document : texte imprimé Auteurs : Emine Sert, Auteur ; Ferhan Sami Atalay, Auteur Année de publication : 2012 Article en page(s) : pp. 6666-6671 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Catalytic  reaction  Esterification Résumé : The liquid phase esterification of acrylic acid with different alcohols (butanol, iso-butanol, or hexanol) was investigated in a batch reactor with zirconia supported tungstophosphoric acid (TPA) as heterogeneous catalyst. The prepared catalysts with different TPA loadings (20, 25, and 30 wt %) and calcination temperatures (550, 650, and 750 °C) were characterized by nitrogen adsorption studies, X-ray diffraction (XRD), and thermogravimetric analysis (TGA) techniques. In addition, acidity measurements were performed by potentiometric titration with n-butylamine. The activitiy of catalysts strongly dependent on the acidic characteristic of the catalysts. The most active catalyst, 25 wt % TPA, calcined at 650 °C, gave more than 33%, 31%, and 27% conversions of acrylic acid for butyl, iso-butyl, and hexyl acrylate synthesis, respectively. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25900220 [article] Esterification of acrylic acid with different alcohols catalyzed by zirconia supported tungstophosphoric acid [texte imprimé] / Emine Sert, Auteur ; Ferhan Sami Atalay, Auteur . - 2012 . - pp. 6666-6671. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 19 (Mai 2012) . - pp. 6666-6671 Mots-clés : Catalytic  reaction  Esterification Résumé : The liquid phase esterification of acrylic acid with different alcohols (butanol, iso-butanol, or hexanol) was investigated in a batch reactor with zirconia supported tungstophosphoric acid (TPA) as heterogeneous catalyst. The prepared catalysts with different TPA loadings (20, 25, and 30 wt %) and calcination temperatures (550, 650, and 750 °C) were characterized by nitrogen adsorption studies, X-ray diffraction (XRD), and thermogravimetric analysis (TGA) techniques. In addition, acidity measurements were performed by potentiometric titration with n-butylamine. The activitiy of catalysts strongly dependent on the acidic characteristic of the catalysts. The most active catalyst, 25 wt % TPA, calcined at 650 °C, gave more than 33%, 31%, and 27% conversions of acrylic acid for butyl, iso-butyl, and hexyl acrylate synthesis, respectively. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25900220