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Mass transfer and solubility of CO and H2 in ionic liquid. Case of [Bmim][PF6] with gas-inducing stirrer reactor / Amit Sharma in Industrial & engineering chemistry research, Vol. 48 N° 8 (Avril 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 8 (Avril 2009) . - pp. 4075–4082 Titre : Mass transfer and solubility of CO and H2 in ionic liquid. Case of [Bmim][PF6] with gas-inducing stirrer reactor Type de document : texte imprimé Auteurs : Amit Sharma, Auteur ; Carine Julcour, Auteur ; Ashutosh A. Kelkar, Auteur Année de publication : 2009 Article en page(s) : pp. 4075–4082 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Ionic  liquids  Solubility  Gas−liquid  mass  transfer  Carbon  monoxide  Hydrogen Résumé : Since the past decade, ionic liquids have gained significant importance as alternative solvents for catalysis applications. Many of the reactions evaluated in ionic liquids employ gases as substrates, and therefore it is important to know their solubility and mass transfer characteristics. This work reports for the first time both the solubility and volumetric gas−liquid mass transfer coefficient kLa for hydrogen and carbon monoxide in 1-n-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF6]) at three temperatures (293, 323, and 373 K) in relevance to hydroformylation reaction. The experimental data on the volumetric gas−liquid mass transfer coefficient are described by a dimensionless correlation for the bench-scale stirred tanks with gas-inducing impeller. kLa values have also been evaluated for different [Bmim][PF6]−decane emulsions at 373 K. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801584p [article] Mass transfer and solubility of CO and H2 in ionic liquid. Case of [Bmim][PF6] with gas-inducing stirrer reactor [texte imprimé] / Amit Sharma, Auteur ; Carine Julcour, Auteur ; Ashutosh A. Kelkar, Auteur . - 2009 . - pp. 4075–4082. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 8 (Avril 2009) . - pp. 4075–4082 Mots-clés : Ionic  liquids  Solubility  Gas−liquid  mass  transfer  Carbon  monoxide  Hydrogen Résumé : Since the past decade, ionic liquids have gained significant importance as alternative solvents for catalysis applications. Many of the reactions evaluated in ionic liquids employ gases as substrates, and therefore it is important to know their solubility and mass transfer characteristics. This work reports for the first time both the solubility and volumetric gas−liquid mass transfer coefficient kLa for hydrogen and carbon monoxide in 1-n-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF6]) at three temperatures (293, 323, and 373 K) in relevance to hydroformylation reaction. The experimental data on the volumetric gas−liquid mass transfer coefficient are described by a dimensionless correlation for the bench-scale stirred tanks with gas-inducing impeller. kLa values have also been evaluated for different [Bmim][PF6]−decane emulsions at 373 K. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801584p

Regeneration of activated carbon by (photo)-fenton oxidation / Cínthia T. Muranaka in Industrial & engineering chemistry research, Vol. 49 N° 3 (Fevrier 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 3 (Fevrier 2010) . - pp. 989–995 Titre : Regeneration of activated carbon by (photo)-fenton oxidation Type de document : texte imprimé Auteurs : Cínthia T. Muranaka, Auteur ; Carine Julcour, Auteur ; Anne-Marie Wilhelm, Auteur Année de publication : 2010 Article en page(s) : pp. 989–995 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Carbon--Photo--Fenton--Oxidation Résumé : This work aims to study the adsorption of phenol on activated carbons (ACs) and the consecutive in situ regeneration of carbon by Fenton oxidation. Two different operations have been carried out: (1) a batch procedure in order to investigate the influence of Fe2+ and H2O2 concentrations; (2) continuous fixed bed adsorption, followed by a batch circulation of the Fenton’s reagent through the saturated AC bed, to examine the efficiency of the real process. Two different activated carbons have been also studied: a both micro- and mesoporous AC (L27) and an only microporous one (S23). In the batch reactor the best conditions found for pollutant mineralization in the homogeneous Fenton system are not the best for AC regeneration: a continuous reduction of adsorption capacity of L27 is observed after 3 oxidations, due to the decrease of both AC weight and surface area. Higher concentration of Fe2+ and lower concentration of H2O2 (2 times the stoichiometry) lead to a 50% recovery of the initial adsorption capacity during at least four consecutive cycles for L27, while about 20% or less for S23. In the consecutive continuous adsorption/batch Fenton oxidation process, the regeneration efficiency reaches 30−40% for L27 after two cycles whatever the feed concentration and less than 10% for S23. A photo-Fenton test performed on L27 shows almost complete mineralization (contrary to “dark” Fenton) and further improves recovery of AC adsorption capacity although not complete (56% after two cycles). Note de contenu : Bibiogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900675d [article] Regeneration of activated carbon by (photo)-fenton oxidation [texte imprimé] / Cínthia T. Muranaka, Auteur ; Carine Julcour, Auteur ; Anne-Marie Wilhelm, Auteur . - 2010 . - pp. 989–995. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 3 (Fevrier 2010) . - pp. 989–995 Mots-clés : Carbon--Photo--Fenton--Oxidation Résumé : This work aims to study the adsorption of phenol on activated carbons (ACs) and the consecutive in situ regeneration of carbon by Fenton oxidation. Two different operations have been carried out: (1) a batch procedure in order to investigate the influence of Fe2+ and H2O2 concentrations; (2) continuous fixed bed adsorption, followed by a batch circulation of the Fenton’s reagent through the saturated AC bed, to examine the efficiency of the real process. Two different activated carbons have been also studied: a both micro- and mesoporous AC (L27) and an only microporous one (S23). In the batch reactor the best conditions found for pollutant mineralization in the homogeneous Fenton system are not the best for AC regeneration: a continuous reduction of adsorption capacity of L27 is observed after 3 oxidations, due to the decrease of both AC weight and surface area. Higher concentration of Fe2+ and lower concentration of H2O2 (2 times the stoichiometry) lead to a 50% recovery of the initial adsorption capacity during at least four consecutive cycles for L27, while about 20% or less for S23. In the consecutive continuous adsorption/batch Fenton oxidation process, the regeneration efficiency reaches 30−40% for L27 after two cycles whatever the feed concentration and less than 10% for S23. A photo-Fenton test performed on L27 shows almost complete mineralization (contrary to “dark” Fenton) and further improves recovery of AC adsorption capacity although not complete (56% after two cycles). Note de contenu : Bibiogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900675d