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Desulfurization of fuel by extraction with pyridinium-based ionic liquids / Hongshuai Gao in Industrial & engineering chemistry research, Vol. 47 n°21 (Novembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°21 (Novembre 2008) . - p. 8384–8388 Titre : Desulfurization of fuel by extraction with pyridinium-based ionic liquids Type de document : texte imprimé Auteurs : Hongshuai Gao, Auteur ; Mingfang Luo, Auteur ; Jianmin Xing, Auteur Année de publication : 2008 Article en page(s) : p. 8384–8388 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Pyridinium-based  ionic  liquids Résumé : The pyridinium-based ionic liquids (ILs) N-butylpyridinium tetrafluoroborate ([BPy][BF4]), N-hexylpyridinium tetrafluoroborate ([HPy][BF4]), and N-octylpyridinium tetrafluoroborate ([OPy][BF4]) were found to be effective for the selective removal of aromatic heterocyclic sulfur compounds from diesel at room temperature. The results suggested that the structure and size of the cation greatly affect the extractive performance of ILs. The extractive performance using pyridinium-based ILs followed the order [BPy][BF4] < [HPy][BF4] < [OPy][BF4], and for the IL, the sulfur removal selectivity of sulfur compounds followed the order thiophene (TS) < benzothiophene (BT) < dibenzothiophene (DBT) under the same conditions. The pyridinium-based ILs would not contaminate the diesel due to their insolubility. On the other hand, diesel has a certain solubility in pyridinium-based ILs, varying from 0.49 wt % for [BPy][BF4] to 1.97 wt % for [OPy][BF4]. According to the results, [HPy][BF4] and [OPy][BF4] might be used as promising solvents for the extractive desulfurization of diesel. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800739w [article] Desulfurization of fuel by extraction with pyridinium-based ionic liquids [texte imprimé] / Hongshuai Gao, Auteur ; Mingfang Luo, Auteur ; Jianmin Xing, Auteur . - 2008 . - p. 8384–8388. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°21 (Novembre 2008) . - p. 8384–8388 Mots-clés : Pyridinium-based  ionic  liquids Résumé : The pyridinium-based ionic liquids (ILs) N-butylpyridinium tetrafluoroborate ([BPy][BF4]), N-hexylpyridinium tetrafluoroborate ([HPy][BF4]), and N-octylpyridinium tetrafluoroborate ([OPy][BF4]) were found to be effective for the selective removal of aromatic heterocyclic sulfur compounds from diesel at room temperature. The results suggested that the structure and size of the cation greatly affect the extractive performance of ILs. The extractive performance using pyridinium-based ILs followed the order [BPy][BF4] < [HPy][BF4] < [OPy][BF4], and for the IL, the sulfur removal selectivity of sulfur compounds followed the order thiophene (TS) < benzothiophene (BT) < dibenzothiophene (DBT) under the same conditions. The pyridinium-based ILs would not contaminate the diesel due to their insolubility. On the other hand, diesel has a certain solubility in pyridinium-based ILs, varying from 0.49 wt % for [BPy][BF4] to 1.97 wt % for [OPy][BF4]. According to the results, [HPy][BF4] and [OPy][BF4] might be used as promising solvents for the extractive desulfurization of diesel. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800739w

Immobilization of ionic liquid [BMIM][PF6] by spraying suspension dispersion method / Hongshuai Gao in Industrial & engineering chemistry research, Vol. 47 N° 13 (Juillet 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N° 13 (Juillet 2008) . - p. 4414–4417 Titre : Immobilization of ionic liquid [BMIM][PF6] by spraying suspension dispersion method Type de document : texte imprimé Auteurs : Hongshuai Gao, Auteur ; Jianmin Xing, Auteur ; Xiaochao Xiong, Auteur ; Yuguang Li, Auteur Année de publication : 2008 Article en page(s) : p. 4414–4417 Note générale : Bibliogr. p. 4417 Langues : Anglais (eng) Mots-clés : Ionic  liquid  --  immobilization;  Spraying  suspension  dispersion;  Nitrogen  gas  pressure Résumé : A novel method of immobilizing ionic liquid of 1-butyl-3-methylimidazolium hexafluorophosphate [BMIM][PF6] by spraying suspension dispersion was proposed. The oil phase, composed of [BMIM][PF6], polysulfone, and dichloromethane, was sprayed into the 0.2 wt % gelatin aqueous solution using nitrogen gas pressure to form droplets. As dichloromethane evaporated completely, polysulfone microcapsules, containing the [BMIM][PF6], were obtained. In order to select a suitable shell material and dispersant, several parallel experiments were also carried out, which proved that that polysulfone and gelatin are suitable shell material and dispersant, respectively. The polysulfone microcapsules enclosing ionic liquid were examined using a scanning electron microscope and thermogravimetric analyzer. The results showed that the microcapsules have an average diameter of 70 μm with narrow size distribution and smooth surface, and the encapsulation capacity of microcapsules is 29%. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie701702n [article] Immobilization of ionic liquid [BMIM][PF6] by spraying suspension dispersion method [texte imprimé] / Hongshuai Gao, Auteur ; Jianmin Xing, Auteur ; Xiaochao Xiong, Auteur ; Yuguang Li, Auteur . - 2008 . - p. 4414–4417. Bibliogr. p. 4417 Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N° 13 (Juillet 2008) . - p. 4414–4417 Mots-clés : Ionic  liquid  --  immobilization;  Spraying  suspension  dispersion;  Nitrogen  gas  pressure Résumé : A novel method of immobilizing ionic liquid of 1-butyl-3-methylimidazolium hexafluorophosphate [BMIM][PF6] by spraying suspension dispersion was proposed. The oil phase, composed of [BMIM][PF6], polysulfone, and dichloromethane, was sprayed into the 0.2 wt % gelatin aqueous solution using nitrogen gas pressure to form droplets. As dichloromethane evaporated completely, polysulfone microcapsules, containing the [BMIM][PF6], were obtained. In order to select a suitable shell material and dispersant, several parallel experiments were also carried out, which proved that that polysulfone and gelatin are suitable shell material and dispersant, respectively. The polysulfone microcapsules enclosing ionic liquid were examined using a scanning electron microscope and thermogravimetric analyzer. The results showed that the microcapsules have an average diameter of 70 μm with narrow size distribution and smooth surface, and the encapsulation capacity of microcapsules is 29%. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie701702n

Separation of succinic acid from fermentation broth using weak alkaline anion exchange adsorbents / Qiang Li 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. 3595–3599 Titre : Separation of succinic acid from fermentation broth using weak alkaline anion exchange adsorbents Type de document : texte imprimé Auteurs : Qiang Li, Auteur ; Jianmin Xing, Auteur ; Wangliang Li, Auteur Année de publication : 2009 Article en page(s) : pp. 3595–3599 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Succinic  acid  Separation  Adsorption  Weak  alkaline  anion  exchange  adsorbe  Langmuir/Freundlich  isotherm  models  Pseudo-first/second-order  equations Résumé : Succinic acid is one of the platform chemicals that can be bioproduced from renewable resources. Separation of succinic acid by adsorption from model solutions and fermentation broth by weak alkaline anion exchange adsorbents was studied. Adsorption capacities and regenerability of several sorts of adsorbents were tested. In a static test, the adsorbent NERCB 09 has the adsorption capacity of 0.11 g succinic acid g−1 at succinic acid concentrations of 5 g L−1. In packed column test, its capacity was as high as 0.56 g succinic acid g−1 when the feeding concentration was 50 g L−1. NERCB 09 showed the high selectivity toward succinate over both glucose and amino acid at acidic or neutral conditions. Langmuir/Freundlich isotherm models and pseudo-first/second-order equations were presented to simulate the adsorption behavior. Data showed that the temperature had little effect on the adsorption isotherm. Kinetic parameters suggested that about 1.5 h were sufficient for the adsorption equilibrium. The adsorbent was easily regenerated. The adsorption capacity was steady after 30 cycles and showed 96% average recovery. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801304k [article] Separation of succinic acid from fermentation broth using weak alkaline anion exchange adsorbents [texte imprimé] / Qiang Li, Auteur ; Jianmin Xing, Auteur ; Wangliang Li, Auteur . - 2009 . - pp. 3595–3599. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 7 (Avril 2009) . - pp. 3595–3599 Mots-clés : Succinic  acid  Separation  Adsorption  Weak  alkaline  anion  exchange  adsorbe  Langmuir/Freundlich  isotherm  models  Pseudo-first/second-order  equations Résumé : Succinic acid is one of the platform chemicals that can be bioproduced from renewable resources. Separation of succinic acid by adsorption from model solutions and fermentation broth by weak alkaline anion exchange adsorbents was studied. Adsorption capacities and regenerability of several sorts of adsorbents were tested. In a static test, the adsorbent NERCB 09 has the adsorption capacity of 0.11 g succinic acid g−1 at succinic acid concentrations of 5 g L−1. In packed column test, its capacity was as high as 0.56 g succinic acid g−1 when the feeding concentration was 50 g L−1. NERCB 09 showed the high selectivity toward succinate over both glucose and amino acid at acidic or neutral conditions. Langmuir/Freundlich isotherm models and pseudo-first/second-order equations were presented to simulate the adsorption behavior. Data showed that the temperature had little effect on the adsorption isotherm. Kinetic parameters suggested that about 1.5 h were sufficient for the adsorption equilibrium. The adsorbent was easily regenerated. The adsorption capacity was steady after 30 cycles and showed 96% average recovery. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801304k