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Correlation and prediction for isobaric vapor – liquid equilibria of the diethyl ether + methanol + 1 - butanol ternary system and the constituent binary systems at 101.325 kPa / Daming Gao in Industrial & engineering chemistry research, Vol. 51 N° 1 (Janvier 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 1 (Janvier 2012) . - pp. 567–575 Titre : Correlation and prediction for isobaric vapor – liquid equilibria of the diethyl ether + methanol + 1 - butanol ternary system and the constituent binary systems at 101.325 kPa Type de document : texte imprimé Auteurs : Daming Gao, Auteur ; Hui Zhang, Auteur ; Dechun Zhu, Auteur Année de publication : 2012 Article en page(s) : pp. 567–575 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Vapor  Liquid  Methanol  Butanol  ternary  system Résumé : The vapor–liquid equilibrium (VLE) data for the diethyl ether + methanol + 1-butanol ternary system and three constituent binary systems were measured at different liquid phase compositions using a dynamic recirculating still at 101.325 kPa. The activity coefficients of the solution were correlated with the Wilson, nonrandom two-liquid (NRTL), Margules, van Laar, and universal quasichemical activity coefficient (UNIQUAC) models through the fit of least-squares method. In addition, the VLE data of the ternary system were also predicted from these binary interaction parameters of Wilson, NRTL, Margules, van Laar, and UNIQUAC model parameters without any additional adjustment, which obtained the calculated vapor-phase compositions and bubble points compared with the measured values. The calculated bubble points with the model parameters of activity coefficients were in good agreement with the experimental data. The ASOG group contribution method also was used for prediction of the three binary systems. The thermodynamic consistency of the experimental VLE data was checked out by means of the Wisniak’s L–W test for the binary systems and the Wisniak–Tamir’s modification of McDermott–Ellis test for the ternary system, respectively. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie201805m [article] Correlation and prediction for isobaric vapor – liquid equilibria of the diethyl ether + methanol + 1 - butanol ternary system and the constituent binary systems at 101.325 kPa [texte imprimé] / Daming Gao, Auteur ; Hui Zhang, Auteur ; Dechun Zhu, Auteur . - 2012 . - pp. 567–575. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 1 (Janvier 2012) . - pp. 567–575 Mots-clés : Vapor  Liquid  Methanol  Butanol  ternary  system Résumé : The vapor–liquid equilibrium (VLE) data for the diethyl ether + methanol + 1-butanol ternary system and three constituent binary systems were measured at different liquid phase compositions using a dynamic recirculating still at 101.325 kPa. The activity coefficients of the solution were correlated with the Wilson, nonrandom two-liquid (NRTL), Margules, van Laar, and universal quasichemical activity coefficient (UNIQUAC) models through the fit of least-squares method. In addition, the VLE data of the ternary system were also predicted from these binary interaction parameters of Wilson, NRTL, Margules, van Laar, and UNIQUAC model parameters without any additional adjustment, which obtained the calculated vapor-phase compositions and bubble points compared with the measured values. The calculated bubble points with the model parameters of activity coefficients were in good agreement with the experimental data. The ASOG group contribution method also was used for prediction of the three binary systems. The thermodynamic consistency of the experimental VLE data was checked out by means of the Wisniak’s L–W test for the binary systems and the Wisniak–Tamir’s modification of McDermott–Ellis test for the ternary system, respectively. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie201805m

Hydrodynamic simulations of seepage catalytic packing internal for catalytic distillation column / Xingang Li in Industrial & engineering chemistry research, Vol. 51 N° 43 (Octobre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 43 (Octobre 2012) . - pp. 14236–14246 Titre : Hydrodynamic simulations of seepage catalytic packing internal for catalytic distillation column Type de document : texte imprimé Auteurs : Xingang Li, Auteur ; Hui Zhang, Auteur ; Xin Gao, Auteur Année de publication : 2013 Article en page(s) : pp. 14236–14246 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Hydrodynamic  Catalytic  distillation Résumé : A seepage catalytic packing internal (SCPI) consisting of catalyst containers with avert-overflow baffles and corrugated metal sheets was developed for a catalytic distillation column. Models used for predicting the pressure drop of the SCPI and the height of liquid above the catalyst bed were built by using a commercial CFD package CFX13.0. Simulation strategies, flow geometry, and boundary conditions of SCPI were described in detail. Taking into account the structure of the corrugated metal sheets indirectly, the porous media model was used to acquire the dry pressure drop of the SCPI. Pseudo single phase formulation was utilized to process two-phase flow simulation for irrigated pressure drop determination. The Euler–Euler two-fluid model was employed to simulate the height of liquid above the catalyst bed and aid in designing the height of catalyst containers with avert-overflow baffles. The dry pressure drop (SCPI-I, SCPI-II), irrigated pressure drop (QLS = 14.06, 23.44 m3/m2/h), and height of liquid above the catalyst bed (HC = 50, 75 mm) were calculated and compared to their experimental counterparts. The average relative error between CFD predictions and the experimental data is in the range 4.26–11.2%. In all cases, the CFD predictions show a good agreement with the experimental data, indicating that these simulation methods are feasible and CFD is a reliable, cost saving, and suitable technique for the design and optimization of SCPI. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3010034 [article] Hydrodynamic simulations of seepage catalytic packing internal for catalytic distillation column [texte imprimé] / Xingang Li, Auteur ; Hui Zhang, Auteur ; Xin Gao, Auteur . - 2013 . - pp. 14236–14246. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 43 (Octobre 2012) . - pp. 14236–14246 Mots-clés : Hydrodynamic  Catalytic  distillation Résumé : A seepage catalytic packing internal (SCPI) consisting of catalyst containers with avert-overflow baffles and corrugated metal sheets was developed for a catalytic distillation column. Models used for predicting the pressure drop of the SCPI and the height of liquid above the catalyst bed were built by using a commercial CFD package CFX13.0. Simulation strategies, flow geometry, and boundary conditions of SCPI were described in detail. Taking into account the structure of the corrugated metal sheets indirectly, the porous media model was used to acquire the dry pressure drop of the SCPI. Pseudo single phase formulation was utilized to process two-phase flow simulation for irrigated pressure drop determination. The Euler–Euler two-fluid model was employed to simulate the height of liquid above the catalyst bed and aid in designing the height of catalyst containers with avert-overflow baffles. The dry pressure drop (SCPI-I, SCPI-II), irrigated pressure drop (QLS = 14.06, 23.44 m3/m2/h), and height of liquid above the catalyst bed (HC = 50, 75 mm) were calculated and compared to their experimental counterparts. The average relative error between CFD predictions and the experimental data is in the range 4.26–11.2%. In all cases, the CFD predictions show a good agreement with the experimental data, indicating that these simulation methods are feasible and CFD is a reliable, cost saving, and suitable technique for the design and optimization of SCPI. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3010034

Study on formation mechanism by monitoring the morphology and structure evolution of nearly monodispersed Fe3O4 submicroparticles with controlled particle sizes / Ting Fan 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. 9009–9018 Titre : Study on formation mechanism by monitoring the morphology and structure evolution of nearly monodispersed Fe3O4 submicroparticles with controlled particle sizes Type de document : texte imprimé Auteurs : Ting Fan, Auteur ; Dengke Pan, Auteur ; Hui Zhang, Auteur Année de publication : 2011 Article en page(s) : pp. 9009–9018 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Particle  size  Morphology  Surveillance  Formation  mechanism Résumé : We present a facile surfactant-free solvothermal method for the fabrication of nearly monodispersed Fe3O4 submicroparticles with tunable particle sizes ranging from 130 to 420 nm by varying the concentration of single iron source FeCl3·6H2O in initial solutions. The morphology and crystal structure of the as-prepared Fe3O4 submicroparticles have been well characterized by using SEM/TEM/HRTEM, XRD, FT-IR, Raman spectroscopy, and XPS methods. It is found that the Fe3O4 particles present single-crystal nature and strong ferromagnetic property with magnetization saturation values ranged in 54.3–88.7 emu·g–1. A complexation–aggregation–phase transformation formation mechanism was first proposed for the nearly monodispersed single-crystal Fe3O4 submicroparticles based upon the quasi-in situ monitoring of the morphology and structure evolution of the samples during the synthesis process. These size-tunable nearly monodispersed Fe3O4 submicroparticles are expected to have promising applications in wide research fields such as bioseparation, targeted drug delivery, and catalysis. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24395847 [article] Study on formation mechanism by monitoring the morphology and structure evolution of nearly monodispersed Fe3O4 submicroparticles with controlled particle sizes [texte imprimé] / Ting Fan, Auteur ; Dengke Pan, Auteur ; Hui Zhang, Auteur . - 2011 . - pp. 9009–9018. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 15 (Août 2011) . - pp. 9009–9018 Mots-clés : Particle  size  Morphology  Surveillance  Formation  mechanism Résumé : We present a facile surfactant-free solvothermal method for the fabrication of nearly monodispersed Fe3O4 submicroparticles with tunable particle sizes ranging from 130 to 420 nm by varying the concentration of single iron source FeCl3·6H2O in initial solutions. The morphology and crystal structure of the as-prepared Fe3O4 submicroparticles have been well characterized by using SEM/TEM/HRTEM, XRD, FT-IR, Raman spectroscopy, and XPS methods. It is found that the Fe3O4 particles present single-crystal nature and strong ferromagnetic property with magnetization saturation values ranged in 54.3–88.7 emu·g–1. A complexation–aggregation–phase transformation formation mechanism was first proposed for the nearly monodispersed single-crystal Fe3O4 submicroparticles based upon the quasi-in situ monitoring of the morphology and structure evolution of the samples during the synthesis process. These size-tunable nearly monodispersed Fe3O4 submicroparticles are expected to have promising applications in wide research fields such as bioseparation, targeted drug delivery, and catalysis. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24395847