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Adsorption of iron and lead ions from an aqueous solution by plasma-modified activated carbon / ChangMing Du in Industrial & engineering chemistry research, Vol. 51 N° 48 (Décembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 48 (Décembre 2012) . - pp. 15618–15625 Titre : Adsorption of iron and lead ions from an aqueous solution by plasma-modified activated carbon Type de document : texte imprimé Auteurs : ChangMing Du, Auteur ; Hui Liu, Auteur ; MuDan Xiao, Auteur Année de publication : 2013 Article en page(s) : pp. 15618–15625 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Adsorption  Iron Résumé : The adsorption properties of gliding arc discharge (GAD) plasma-modified granular activated carbon (AC) were studied with Pb2+, Fe2+, Ni2+, and Cu2+ solutions selected as components of the target wastewater. The physical and chemical properties of the surface of modified AC were monitored by scanning electron microscopy, elemental analysis, and automatic surface area and pore size analysis. The adsorbance of metal ions was measured by inductively coupled plasma optical emission spectrometry. The adsorbance of Fe2+ and Pb2+ increased with GAD modification time, whereas the adsorbance of Ni2+ and Cu2+ barely changed over time. The optimum modification time and gas flow rate were found to be 30 min and 0.9 L/min, respectively. The adsorption mode of Pb2+ or Fe2+ by AC with a modification time of 30 min was monolayer adsorption. The adsorption kinetics of Fe2+ and Pb2+ on AC can be better described by a pseudo-first-order kinetic model. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie302011n [article] Adsorption of iron and lead ions from an aqueous solution by plasma-modified activated carbon [texte imprimé] / ChangMing Du, Auteur ; Hui Liu, Auteur ; MuDan Xiao, Auteur . - 2013 . - pp. 15618–15625. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 48 (Décembre 2012) . - pp. 15618–15625 Mots-clés : Adsorption  Iron Résumé : The adsorption properties of gliding arc discharge (GAD) plasma-modified granular activated carbon (AC) were studied with Pb2+, Fe2+, Ni2+, and Cu2+ solutions selected as components of the target wastewater. The physical and chemical properties of the surface of modified AC were monitored by scanning electron microscopy, elemental analysis, and automatic surface area and pore size analysis. The adsorbance of metal ions was measured by inductively coupled plasma optical emission spectrometry. The adsorbance of Fe2+ and Pb2+ increased with GAD modification time, whereas the adsorbance of Ni2+ and Cu2+ barely changed over time. The optimum modification time and gas flow rate were found to be 30 min and 0.9 L/min, respectively. The adsorption mode of Pb2+ or Fe2+ by AC with a modification time of 30 min was monolayer adsorption. The adsorption kinetics of Fe2+ and Pb2+ on AC can be better described by a pseudo-first-order kinetic model. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie302011n

Effect of preparation processes on catalytic performance of PtSnNa/ZSM-5 for propane dehydrogenation / Hui Liu in Industrial & engineering chemistry research, Vol. 48 N° 12 (Juin 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 12 (Juin 2009) . - pp. 5598–5603 Titre : Effect of preparation processes on catalytic performance of PtSnNa/ZSM-5 for propane dehydrogenation Type de document : texte imprimé Auteurs : Hui Liu, Auteur ; Zhou Yuming, Auteur ; Yiwei Zhang, Auteur Année de publication : 2009 Article en page(s) : pp. 5598–5603 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : PtSnNa/ZSM-5  catalyst  Propane  dehydrogenation  BET  surface  area  measurement Résumé : The effect of different preparation processes (impregnation and agglomeration) on the performance and properties of PtSnNa/ZSM-5 catalyst for propane dehydrogenation was studied. Some methods such as BET surface area measurement, catalyst particle mechanical strength, temperature-programmed desoption of ammonia (TPDA), Solid-state 27Al MAS NMR spectroscopy and temperature-programmed reduction of hydrogen (H2-TPR) were used to characterize the catalysts. The channel of ZSM-5 was hardly blocked after adding the binder despite the sequence of agglomeration and impregnation. Meanwhile the Pt metal dispersion on the preimpregnating catalyst with 5 wt % binder was the highest and the acidity was the weakest. The experimental results of propane dehydrogenation reaction showed that the preimpregnating catalyst with 5 wt % binder indicated the optimum reactivity in three catalysts. Therefore, the preimpregnating method in the case of adding a small amount binder was the optimal preparation method of the catalyst, which could replace the conventional preagglomerating method. Finally, a model for the effect of preparation processes on catalytic performance of PtSnNa/ZSM-5 catalyst was proposed. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900311j [article] Effect of preparation processes on catalytic performance of PtSnNa/ZSM-5 for propane dehydrogenation [texte imprimé] / Hui Liu, Auteur ; Zhou Yuming, Auteur ; Yiwei Zhang, Auteur . - 2009 . - pp. 5598–5603. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 12 (Juin 2009) . - pp. 5598–5603 Mots-clés : PtSnNa/ZSM-5  catalyst  Propane  dehydrogenation  BET  surface  area  measurement Résumé : The effect of different preparation processes (impregnation and agglomeration) on the performance and properties of PtSnNa/ZSM-5 catalyst for propane dehydrogenation was studied. Some methods such as BET surface area measurement, catalyst particle mechanical strength, temperature-programmed desoption of ammonia (TPDA), Solid-state 27Al MAS NMR spectroscopy and temperature-programmed reduction of hydrogen (H2-TPR) were used to characterize the catalysts. The channel of ZSM-5 was hardly blocked after adding the binder despite the sequence of agglomeration and impregnation. Meanwhile the Pt metal dispersion on the preimpregnating catalyst with 5 wt % binder was the highest and the acidity was the weakest. The experimental results of propane dehydrogenation reaction showed that the preimpregnating catalyst with 5 wt % binder indicated the optimum reactivity in three catalysts. Therefore, the preimpregnating method in the case of adding a small amount binder was the optimal preparation method of the catalyst, which could replace the conventional preagglomerating method. Finally, a model for the effect of preparation processes on catalytic performance of PtSnNa/ZSM-5 catalyst was proposed. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900311j

Flotation and surface behavior of cassiterite with salicylhydroxamic acid / Wenqing Qin in Industrial & engineering chemistry research, Vol. 50 N° 18 (Septembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 18 (Septembre 2011) . - pp. 10778-10783 Titre : Flotation and surface behavior of cassiterite with salicylhydroxamic acid Type de document : texte imprimé Auteurs : Wenqing Qin, Auteur ; Yangbao Xu, Auteur ; Hui Liu, Auteur Année de publication : 2011 Article en page(s) : pp. 10778-10783 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Flotation Résumé : The flotation and surface interaction of cassiterite with salicylhydroxamic acid have been investigated in this paper. The results showed that recovery of cassiterite with salicylhydroxamic acid was high at a neutral pH, with the maximum recovery occurring at ca. pH 6.5. When the size of cassiterite is less than 74 μm, coarse particles showed better flotability than the fine ones. The adsorption of salicylhydroxamic acid was also high at a neutral pH. The isoelectric point of cassiterite showed an acidic shift in the presence of salicylhydroxamic acid. A chelate was identified on the cassiterite surface. The results of the adsorption, electrophoretic mobility, and IR spectrum of cassiterite indicated that the adsorption on the cassiterite surface included both physical and chemical adsorption. On the basis of the experimental results, a complex multilayer adsorption model was proposed to illustrate the adsorption on the surface of cassiterite. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24523894 [article] Flotation and surface behavior of cassiterite with salicylhydroxamic acid [texte imprimé] / Wenqing Qin, Auteur ; Yangbao Xu, Auteur ; Hui Liu, Auteur . - 2011 . - pp. 10778-10783. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 18 (Septembre 2011) . - pp. 10778-10783 Mots-clés : Flotation Résumé : The flotation and surface interaction of cassiterite with salicylhydroxamic acid have been investigated in this paper. The results showed that recovery of cassiterite with salicylhydroxamic acid was high at a neutral pH, with the maximum recovery occurring at ca. pH 6.5. When the size of cassiterite is less than 74 μm, coarse particles showed better flotability than the fine ones. The adsorption of salicylhydroxamic acid was also high at a neutral pH. The isoelectric point of cassiterite showed an acidic shift in the presence of salicylhydroxamic acid. A chelate was identified on the cassiterite surface. The results of the adsorption, electrophoretic mobility, and IR spectrum of cassiterite indicated that the adsorption on the cassiterite surface included both physical and chemical adsorption. On the basis of the experimental results, a complex multilayer adsorption model was proposed to illustrate the adsorption on the surface of cassiterite. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24523894

Influence of Binder on the CatalyticperformaInfluence of binder on the catalytic nce of ptSnNa/ZSM-5 catalyst for propane dehydrogenation / Hui Liu 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. 8142–8147 Titre : Influence of Binder on the CatalyticperformaInfluence of binder on the catalytic nce of ptSnNa/ZSM-5 catalyst for propane dehydrogenation Type de document : texte imprimé Auteurs : Hui Liu, Auteur ; Yuming Zhou, Auteur ; Yiwei Zhang, Auteur Année de publication : 2008 Article en page(s) : p. 8142–8147 Note générale : Chemical engineering Langues : Anglais (eng) Résumé : The influence of different binders (alumina, silica sol, and montmorillonite) on the structure and performance of PtSnNa/ZSM-5 catalysts for propane dehydrogenation to propene was studied. Temperature-programmed desoption of ammonia (NH3-TPD), hydrogen chemisorption, BET surface area measurement, solid-state 27Al MAS NMR spectroscopy, catalyst particle mechanical strength, and X-ray diffraction (XRD) were used to characterize the catalysts. After agglomeration with different binders, the mechanical strength of all catalyst particles increased obviously in comparison with the nonagglomerated sample and the Al species amounts of the catalysts were affected greatly by the binder. A slightly acidic change was observed for the catalysts with different binders, but the metal dispersion on the carrier of different samples was clearly different. The result of propane dehydrogenation indicated that the catalyst based on PtSnNa/ZSM-5 agglomerated with alumina showed the highest conversion and high selectivity. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800693t [article] Influence of Binder on the CatalyticperformaInfluence of binder on the catalytic nce of ptSnNa/ZSM-5 catalyst for propane dehydrogenation [texte imprimé] / Hui Liu, Auteur ; Yuming Zhou, Auteur ; Yiwei Zhang, Auteur . - 2008 . - p. 8142–8147. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°21 (Novembre 2008) . - p. 8142–8147 Résumé : The influence of different binders (alumina, silica sol, and montmorillonite) on the structure and performance of PtSnNa/ZSM-5 catalysts for propane dehydrogenation to propene was studied. Temperature-programmed desoption of ammonia (NH3-TPD), hydrogen chemisorption, BET surface area measurement, solid-state 27Al MAS NMR spectroscopy, catalyst particle mechanical strength, and X-ray diffraction (XRD) were used to characterize the catalysts. After agglomeration with different binders, the mechanical strength of all catalyst particles increased obviously in comparison with the nonagglomerated sample and the Al species amounts of the catalysts were affected greatly by the binder. A slightly acidic change was observed for the catalysts with different binders, but the metal dispersion on the carrier of different samples was clearly different. The result of propane dehydrogenation indicated that the catalyst based on PtSnNa/ZSM-5 agglomerated with alumina showed the highest conversion and high selectivity. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800693t

Surfactant assisted hydrothermal and thermal decomposition synthesis of alumina microfibers with mesoporous structure / Zhenfeng Zhu in Chemical engineering journal, Vol. 155 N° 3 (Decembre 2009) 

Public ISBD [article]  in Chemical engineering journal > Vol. 155 N° 3 (Decembre 2009) . - pp. 925-930 Titre : Surfactant assisted hydrothermal and thermal decomposition synthesis of alumina microfibers with mesoporous structure Type de document : texte imprimé Auteurs : Zhenfeng Zhu, Auteur ; Hui Liu, Auteur ; Hongjun Sun, Auteur Année de publication : 2010 Article en page(s) : pp. 925-930 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Mesoporous  alumina  Microfibers  Hydrothermal  synthesis  SCR-NH3  of  NO Index. décimale : 660 Résumé : The alumina microfibers with mesoporous structure were synthesized by a facile hydrothermal and thermal decomposition route. The as-obtained products were well characterized by XRD, SEM, TEM (HRTEM), SAED and N2 adsorption–desorption measurement. It was shown that the length and diameter of these alumina microfibers are about 10 μm and 300–500 nm, respectively. All these alumina microfibers prepared by the PEG templates with different molecular weight have the different high surface area but nearly the same pore diameter about 3.5 nm. The calcination experimental result shows that the mesoporosity of these alumina microfibers can be maintained even at 1373 K. On the other hand, the higher selective catalytic reduction (SCR) of NO effectiveness present that the as-obtained mesoporous alumina have stronger adsorption property because of its high surface area. DEWEY : 660 ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFJ-4X9NVBP-4&_user=6 [...] [article] Surfactant assisted hydrothermal and thermal decomposition synthesis of alumina microfibers with mesoporous structure [texte imprimé] / Zhenfeng Zhu, Auteur ; Hui Liu, Auteur ; Hongjun Sun, Auteur . - 2010 . - pp. 925-930. Génie Chimique Langues : Anglais (eng) in Chemical engineering journal > Vol. 155 N° 3 (Decembre 2009) . - pp. 925-930 Mots-clés : Mesoporous  alumina  Microfibers  Hydrothermal  synthesis  SCR-NH3  of  NO Index. décimale : 660 Résumé : The alumina microfibers with mesoporous structure were synthesized by a facile hydrothermal and thermal decomposition route. The as-obtained products were well characterized by XRD, SEM, TEM (HRTEM), SAED and N2 adsorption–desorption measurement. It was shown that the length and diameter of these alumina microfibers are about 10 μm and 300–500 nm, respectively. All these alumina microfibers prepared by the PEG templates with different molecular weight have the different high surface area but nearly the same pore diameter about 3.5 nm. The calcination experimental result shows that the mesoporosity of these alumina microfibers can be maintained even at 1373 K. On the other hand, the higher selective catalytic reduction (SCR) of NO effectiveness present that the as-obtained mesoporous alumina have stronger adsorption property because of its high surface area. DEWEY : 660 ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFJ-4X9NVBP-4&_user=6 [...]

Theoretical study of the influence of mixing on the selective noncatalytic reduction process with CH4 or H2 addition / Qingxi Cao in Industrial & engineering chemistry research, Vol. 50 N° 18 (Septembre 2011) 

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