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Kinetics of glucose isomerization to fructose by immobilized glucose isomerase (sweetzyme IT) / Asghar Molaei Dehkordi in Industrial & engineering chemistry research, Vol. 48 N° 7 (Avril 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 7 (Avril 2009) . - pp. 3271–3278 Titre : Kinetics of glucose isomerization to fructose by immobilized glucose isomerase (sweetzyme IT) Type de document : texte imprimé Auteurs : Asghar Molaei Dehkordi, Auteur ; Mehrdad Shoai Tehrany, Auteur ; Iman Safari, Auteur Année de publication : 2009 Article en page(s) : pp. 3271–3278 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Immobilized  glucose  isomerase  Stirred-tank  reactor  Fructose  isomerization  reaction  Arrhenius-like  expressions Résumé : We present the kinetic parameters and equilibrium constant of the enzymatic glucose−fructose isomerization reaction with an immobilized glucose isomerase (IGI), Sweetzyme IT, using a batch stirred-tank reactor following the procedure developed by Dehkordi et al. ( AIChE J. 2008, 54, 1333). The model predictions were compared with the experimental data and fair agreements were found. The influence of temperature on the equilibrium constant and kinetic parameters of glucose to fructose isomerization reaction was investigated. In addition, the frequency factors and the activation energies were determined by using Arrhenius-like expressions. Furthermore, correlations were found for the maximum reaction rate (i.e., Vm) and apparent Michaelis−Menten constant (i.e., Km). En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800400b [article] Kinetics of glucose isomerization to fructose by immobilized glucose isomerase (sweetzyme IT) [texte imprimé] / Asghar Molaei Dehkordi, Auteur ; Mehrdad Shoai Tehrany, Auteur ; Iman Safari, Auteur . - 2009 . - pp. 3271–3278. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 7 (Avril 2009) . - pp. 3271–3278 Mots-clés : Immobilized  glucose  isomerase  Stirred-tank  reactor  Fructose  isomerization  reaction  Arrhenius-like  expressions Résumé : We present the kinetic parameters and equilibrium constant of the enzymatic glucose−fructose isomerization reaction with an immobilized glucose isomerase (IGI), Sweetzyme IT, using a batch stirred-tank reactor following the procedure developed by Dehkordi et al. ( AIChE J. 2008, 54, 1333). The model predictions were compared with the experimental data and fair agreements were found. The influence of temperature on the equilibrium constant and kinetic parameters of glucose to fructose isomerization reaction was investigated. In addition, the frequency factors and the activation energies were determined by using Arrhenius-like expressions. Furthermore, correlations were found for the maximum reaction rate (i.e., Vm) and apparent Michaelis−Menten constant (i.e., Km). En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800400b

Solid-liquid catalytic reactions in a new two-impinging-jets reactor / Asghar Molaei Dehkordi in Industrial & engineering chemistry research, Vol. 48 N° 6 (Mars 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 6 (Mars 2009) . - pp. 2861–2869 Titre : Solid-liquid catalytic reactions in a new two-impinging-jets reactor : experiment and modeling Type de document : texte imprimé Auteurs : Asghar Molaei Dehkordi, Auteur ; Iman Safari, Auteur ; Amir A. Ebrahimi, Auteur Année de publication : 2009 Article en page(s) : pp. 2861–2869 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Two-impinging-jets  loop  reactor  Solid-liquid  catalytic  reactions  d-glucose  d-fructose Résumé : Novel type of two-impinging-jets loop reactor (TIJLR) has been proposed and tested successfully for the solid−liquid catalytic reactions. The TIJLR was tested using the catalytic reaction of isomerization of d-glucose to d-fructose by immobilized glucose isomerase catalyst as a typical model system of solid−liquid catalytic reactions. The TIJLR is characterized by a high intensity reaction chamber, which is separated by a perforated plate from other parts of the reactor. The perforated plate was used as a filter to keep the catalyst particles within the reaction chamber. A compartment model with two adjustable parameters was considered to describe the pattern of flow within the reaction chamber. The compartment model proposed was based on the observation made during the experimental work. The adjustable parameters of the proposed model were determined through the experimental data by minimizing the discrepancies between the model predictions and corresponding experimental data. The influences of various operating and design parameters such as jet Reynolds number, feed flow rate, initial feed concentration, catalyst loading, and the volume of the reaction chamber on the performance capability of the TIJLR were investigated. It was found that the jet Reynolds number plays an important role in the performance capability of the TIJLR. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801240q [article] Solid-liquid catalytic reactions in a new two-impinging-jets reactor : experiment and modeling [texte imprimé] / Asghar Molaei Dehkordi, Auteur ; Iman Safari, Auteur ; Amir A. Ebrahimi, Auteur . - 2009 . - pp. 2861–2869. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 6 (Mars 2009) . - pp. 2861–2869 Mots-clés : Two-impinging-jets  loop  reactor  Solid-liquid  catalytic  reactions  d-glucose  d-fructose Résumé : Novel type of two-impinging-jets loop reactor (TIJLR) has been proposed and tested successfully for the solid−liquid catalytic reactions. The TIJLR was tested using the catalytic reaction of isomerization of d-glucose to d-fructose by immobilized glucose isomerase catalyst as a typical model system of solid−liquid catalytic reactions. The TIJLR is characterized by a high intensity reaction chamber, which is separated by a perforated plate from other parts of the reactor. The perforated plate was used as a filter to keep the catalyst particles within the reaction chamber. A compartment model with two adjustable parameters was considered to describe the pattern of flow within the reaction chamber. The compartment model proposed was based on the observation made during the experimental work. The adjustable parameters of the proposed model were determined through the experimental data by minimizing the discrepancies between the model predictions and corresponding experimental data. The influences of various operating and design parameters such as jet Reynolds number, feed flow rate, initial feed concentration, catalyst loading, and the volume of the reaction chamber on the performance capability of the TIJLR were investigated. It was found that the jet Reynolds number plays an important role in the performance capability of the TIJLR. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801240q