Documents disponibles écrits par cet auteur

Effect of FiberProperty variation on hollow fiber membrane module performance in the production of a permeate product / Santosh A. Sonalkar in Industrial & engineering chemistry research, Vol. 49 N° 23 (Décembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 23 (Décembre 2010) . - pp. 12074–12083 Titre : Effect of FiberProperty variation on hollow fiber membrane module performance in the production of a permeate product Type de document : texte imprimé Auteurs : Santosh A. Sonalkar, Auteur ; Pingjiao Hao, Auteur ; G. Glenn Lipscomb, Auteur Année de publication : 2011 Article en page(s) : pp. 12074–12083 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Fiber Résumé : The literature demonstrates the detrimental effects of variability in the inner diameter, permeance, and selectivity of hollow fiber membranes for the production of a retentate product, for example, nitrogen purification from air. This past work is extended to the production of a permeate product. Additionally, simultaneous variation of multiple fiber properties is considered. Fiber variability is detrimental to permeate production; the ratio of product to feed flow rate decreases with an increase in variability. However, the permeate product flow rate remains unchanged in contrast to the large changes observed for a retentate product. Simultaneous, independent variation of multiple fiber properties makes performance worse. However, correlations between the variations in fiber properties can improve performance. Theoretical performance predictions compare favorably with experimental measurements for the production of oxygen from air if either simultaneous variation of fiber size with permeance occurs or significant deviations from countercurrent flow exist. The results may be used to develop manufacturing guidelines for the production of hollow fiber membranes. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100649q [article] Effect of FiberProperty variation on hollow fiber membrane module performance in the production of a permeate product [texte imprimé] / Santosh A. Sonalkar, Auteur ; Pingjiao Hao, Auteur ; G. Glenn Lipscomb, Auteur . - 2011 . - pp. 12074–12083. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 23 (Décembre 2010) . - pp. 12074–12083 Mots-clés : Fiber Résumé : The literature demonstrates the detrimental effects of variability in the inner diameter, permeance, and selectivity of hollow fiber membranes for the production of a retentate product, for example, nitrogen purification from air. This past work is extended to the production of a permeate product. Additionally, simultaneous variation of multiple fiber properties is considered. Fiber variability is detrimental to permeate production; the ratio of product to feed flow rate decreases with an increase in variability. However, the permeate product flow rate remains unchanged in contrast to the large changes observed for a retentate product. Simultaneous, independent variation of multiple fiber properties makes performance worse. However, correlations between the variations in fiber properties can improve performance. Theoretical performance predictions compare favorably with experimental measurements for the production of oxygen from air if either simultaneous variation of fiber size with permeance occurs or significant deviations from countercurrent flow exist. The results may be used to develop manufacturing guidelines for the production of hollow fiber membranes. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100649q

Kinetics and modeling of the flexible fuel reformer: n-hexadecane steam reforming and combustion / Preshit V. Gawade in Industrial & engineering chemistry research, Vol. 49 N° 15 (Août 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 15 (Août 2010) . - pp 6931–6940 Titre : Kinetics and modeling of the flexible fuel reformer: n-hexadecane steam reforming and combustion Type de document : texte imprimé Auteurs : Preshit V. Gawade, Auteur ; Dhaval Patel, Auteur ; G. Glenn Lipscomb, Auteur Année de publication : 2010 Article en page(s) : pp 6931–6940 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Kinetics  Flexible  fuel. Résumé : Steam reforming of liquid hydrocarbon fuels provides one possible solution for the production of hydrogen for solid oxide fuel cells (SOFCs). However, the design of the reformer is dependent on the kinetics of the catalytic reaction, which is not widely reported. Because reforming is highly endothermic, we have investigated the use of a heat exchange device, designated the flexible fuel reformer (FFR), as a reactor in which combustion and reforming can be simultaneously accomplished. In the present study, we evaluated the reforming and combustion kinetics of n-hexadecane (used as an analog for diesel) over the rhodium/nickel catalyst supported on alumina. Reforming data obtained over the temperature range of 500−750 °C was compared against three different mechanistic models: Eley−Rideal, Langmuir−Hinshelwood bimolecular adsorption, and Langmuir−Hinshelwood dual site. Among all, Eley−Rideal produced good data fitting and fulfilled the thermodynamic criteria in every case. Combustion kinetics of hexadecane was also studied, since our proposed reactor configuration uses the heat from the exothermic combustion reaction as a driver for the endothermic reforming reaction. It was found that power-law model produced the best fit among all the models and this result was further corroborated using statistical analysis. The kinetic results can be combined with the reactor design model to predict the performance and demonstrate the benefit obtained from simultaneous reforming and combustion. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901819x [article] Kinetics and modeling of the flexible fuel reformer: n-hexadecane steam reforming and combustion [texte imprimé] / Preshit V. Gawade, Auteur ; Dhaval Patel, Auteur ; G. Glenn Lipscomb, Auteur . - 2010 . - pp 6931–6940. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 15 (Août 2010) . - pp 6931–6940 Mots-clés : Kinetics  Flexible  fuel. Résumé : Steam reforming of liquid hydrocarbon fuels provides one possible solution for the production of hydrogen for solid oxide fuel cells (SOFCs). However, the design of the reformer is dependent on the kinetics of the catalytic reaction, which is not widely reported. Because reforming is highly endothermic, we have investigated the use of a heat exchange device, designated the flexible fuel reformer (FFR), as a reactor in which combustion and reforming can be simultaneously accomplished. In the present study, we evaluated the reforming and combustion kinetics of n-hexadecane (used as an analog for diesel) over the rhodium/nickel catalyst supported on alumina. Reforming data obtained over the temperature range of 500−750 °C was compared against three different mechanistic models: Eley−Rideal, Langmuir−Hinshelwood bimolecular adsorption, and Langmuir−Hinshelwood dual site. Among all, Eley−Rideal produced good data fitting and fulfilled the thermodynamic criteria in every case. Combustion kinetics of hexadecane was also studied, since our proposed reactor configuration uses the heat from the exothermic combustion reaction as a driver for the endothermic reforming reaction. It was found that power-law model produced the best fit among all the models and this result was further corroborated using statistical analysis. The kinetic results can be combined with the reactor design model to predict the performance and demonstrate the benefit obtained from simultaneous reforming and combustion. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901819x