Documents disponibles écrits par cet auteur

Molecular sieving separation of hexane isomers within nanocomposite (B) - MFI - alumina hollow fiber membranes / Z. Deng in Industrial & engineering chemistry research, Vol. 49 N° 22 (Novembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 22 (Novembre 2010) . - pp.11697–11707 Titre : Molecular sieving separation of hexane isomers within nanocomposite (B) - MFI - alumina hollow fiber membranes : a modeling study Type de document : texte imprimé Auteurs : Z. Deng, Auteur ; M. Pera-Titus, Auteur ; Y. Guo, Auteur Année de publication : 2011 Article en page(s) : pp.11697–11707 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Nanocomposite  Fiber  membranes  Modeling Résumé : High quality nanocomposite B-MFI hollow fibers were successfully prepared by pore-plugging hydrothermal synthesis. The incorporation of boron into the MFI structure modifies the n-hexane/2,2-dimethylbutane vapor separation properties of the membranes, with the materials improving the n-hexane/2,2-dimethylbutane intrinsic separation factors of Al-MFI by a factor of 2 (up to a value of 200) at comparable conditions. The permeation performance of the membranes is essentially governed by a molecular sieving mechanism driven by preferential diffusion of n-C6 and configurational diffusion effects favoring n-hexane adsorption from n-hexane/2,2-dimethylbutane mixtures. A strong confinement scenario for surface diffusion of both n-hexane and 2,2-dimethylbutane seems to prevail. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101566q [article] Molecular sieving separation of hexane isomers within nanocomposite (B) - MFI - alumina hollow fiber membranes : a modeling study [texte imprimé] / Z. Deng, Auteur ; M. Pera-Titus, Auteur ; Y. Guo, Auteur . - 2011 . - pp.11697–11707. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 22 (Novembre 2010) . - pp.11697–11707 Mots-clés : Nanocomposite  Fiber  membranes  Modeling Résumé : High quality nanocomposite B-MFI hollow fibers were successfully prepared by pore-plugging hydrothermal synthesis. The incorporation of boron into the MFI structure modifies the n-hexane/2,2-dimethylbutane vapor separation properties of the membranes, with the materials improving the n-hexane/2,2-dimethylbutane intrinsic separation factors of Al-MFI by a factor of 2 (up to a value of 200) at comparable conditions. The permeation performance of the membranes is essentially governed by a molecular sieving mechanism driven by preferential diffusion of n-C6 and configurational diffusion effects favoring n-hexane adsorption from n-hexane/2,2-dimethylbutane mixtures. A strong confinement scenario for surface diffusion of both n-hexane and 2,2-dimethylbutane seems to prevail. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101566q

Nanocomposite MFI−alumina membranes / M. Pera-Titus in Industrial & engineering chemistry research, Vol. 48 N° 20 (Octobre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 20 (Octobre 2009) . - pp. 9215–9223 Titre : Nanocomposite MFI−alumina membranes : high-flux hollow fibers for CO2 capture from internal combustion vehicles Type de document : texte imprimé Auteurs : M. Pera-Titus, Auteur ; A. Alshebani, Auteur ; C H. Nicolas, Auteur Année de publication : 2010 Article en page(s) : pp. 9215–9223 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Transport  field  accounts  CO2  emission  pattern  High-flux  nanocomposite  MFI−alumina  membranes Résumé : The transport field accounts for about 35% of CO2 emissions in France, while energy production only involves 16% of the emissions. The strong contribution of transport to the CO2 emission pattern in France is mainly ascribed to the great development of the nuclear field as energy vector. Therefore, in order to meet Kyoto targets, CO2 emissions in vehicles should be drastically reduced in France in the forthcoming decades. To this aim, taking into account a scenario where thermal engines will keep their supremacy as the main propulsion technology at short and mid terms, in addition to increasing more and more energy efficiency, a possibility to reduce drastically CO2 emissions from transport could involve direct CO2 capture and in situ storage from exhaust gases. In this study, we propose the use of high-flux nanocomposite MFI−alumina hollow-fiber membranes recently developed in our laboratory for direct CO2 capture from mobile sources. A critical discussion is provided about the technico-economical feasibility (i.e., CO2 recovery, CO2 purity in the permeate, module volume, energy overcomsumption, and autonomy) of a membrane-based unit for CO2 capture and liquefaction in the special case of heavy vehicles (over 3500 kg) using conventional diesel propulsion standards. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9004018 [article] Nanocomposite MFI−alumina membranes : high-flux hollow fibers for CO2 capture from internal combustion vehicles [texte imprimé] / M. Pera-Titus, Auteur ; A. Alshebani, Auteur ; C H. Nicolas, Auteur . - 2010 . - pp. 9215–9223. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 20 (Octobre 2009) . - pp. 9215–9223 Mots-clés : Transport  field  accounts  CO2  emission  pattern  High-flux  nanocomposite  MFI−alumina  membranes Résumé : The transport field accounts for about 35% of CO2 emissions in France, while energy production only involves 16% of the emissions. The strong contribution of transport to the CO2 emission pattern in France is mainly ascribed to the great development of the nuclear field as energy vector. Therefore, in order to meet Kyoto targets, CO2 emissions in vehicles should be drastically reduced in France in the forthcoming decades. To this aim, taking into account a scenario where thermal engines will keep their supremacy as the main propulsion technology at short and mid terms, in addition to increasing more and more energy efficiency, a possibility to reduce drastically CO2 emissions from transport could involve direct CO2 capture and in situ storage from exhaust gases. In this study, we propose the use of high-flux nanocomposite MFI−alumina hollow-fiber membranes recently developed in our laboratory for direct CO2 capture from mobile sources. A critical discussion is provided about the technico-economical feasibility (i.e., CO2 recovery, CO2 purity in the permeate, module volume, energy overcomsumption, and autonomy) of a membrane-based unit for CO2 capture and liquefaction in the special case of heavy vehicles (over 3500 kg) using conventional diesel propulsion standards. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9004018

Nanocomposite MFI - alumina hollow fiber membranes / C H. Nicolas in Industrial & engineering chemistry research, Vol.51 N° 31 (Août 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol.51 N° 31 (Août 2012) . - pp. 10451-10461 Titre : Nanocomposite MFI - alumina hollow fiber membranes : Influence of NOx and Propane on CO2/N2 Separation Properties Type de document : texte imprimé Auteurs : C H. Nicolas, Auteur ; M. Pera-Titus, Auteur Année de publication : 2012 Article en page(s) : pp. 10451-10461 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Carbon  dioxide  Hollow  fiber  Nanocomposite Résumé : This study provides a detailed survey of the effect of moisture, NOx and light hydrocarbons (i.e., propane) on the CO2/N2 permeation and separation properties of MFI-type hollow-fiber membranes in view of on board CO2 capture applications in Diesel vehicles. Five different MFI-alumina samples have been prepared including different degrees of isomorphous boron and germanium substitution, as well as ex framework proton exchange by copper. The quality of the synthesized hollow fibers has been primarily assessed by pure N2 permeation and n-butane/H2 and SF6/N2 separation at room temperature. The different materials show preferential CO2/N2 and CO2/NO selectivity at low CO2 feed concentrations (∼10%) in the temperature range 298―373 K, which can be appreciably promoted under the presence of propane (1 v/v %). The materials show stable and high CO2 permeances even in the presence of large amounts of water in the feed stream. On the basis of the permeation and separation data measured in this study, we present a refined simulation study of a membrane cascade system constituted of two hollow-fiber membrane modules coupled to a DeNox unit for on board CO2 capture and liquefaction/ supercritical storage in heavy vehicles (>40 tn). ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26234076 [article] Nanocomposite MFI - alumina hollow fiber membranes : Influence of NOx and Propane on CO2/N2 Separation Properties [texte imprimé] / C H. Nicolas, Auteur ; M. Pera-Titus, Auteur . - 2012 . - pp. 10451-10461. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol.51 N° 31 (Août 2012) . - pp. 10451-10461 Mots-clés : Carbon  dioxide  Hollow  fiber  Nanocomposite Résumé : This study provides a detailed survey of the effect of moisture, NOx and light hydrocarbons (i.e., propane) on the CO2/N2 permeation and separation properties of MFI-type hollow-fiber membranes in view of on board CO2 capture applications in Diesel vehicles. Five different MFI-alumina samples have been prepared including different degrees of isomorphous boron and germanium substitution, as well as ex framework proton exchange by copper. The quality of the synthesized hollow fibers has been primarily assessed by pure N2 permeation and n-butane/H2 and SF6/N2 separation at room temperature. The different materials show preferential CO2/N2 and CO2/NO selectivity at low CO2 feed concentrations (∼10%) in the temperature range 298―373 K, which can be appreciably promoted under the presence of propane (1 v/v %). The materials show stable and high CO2 permeances even in the presence of large amounts of water in the feed stream. On the basis of the permeation and separation data measured in this study, we present a refined simulation study of a membrane cascade system constituted of two hollow-fiber membrane modules coupled to a DeNox unit for on board CO2 capture and liquefaction/ supercritical storage in heavy vehicles (>40 tn). ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26234076