Numerical study on the effect of the air jets at the inlet distributor in the gas − solids circulating fluidized - bed risers / Botao Peng in Industrial & engineering chemistry research, Vol. 49 N° 11 (Juin 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 11 (Juin 2010) . - pp. 5310–5322 Titre : Numerical study on the effect of the air jets at the inlet distributor in the gas − solids circulating fluidized - bed risers Type de document : texte imprimé Auteurs : Botao Peng, Auteur ; Jesse Zhu, Auteur ; Chao Zhang, Auteur Année de publication : 2010 Article en page(s) : pp. 5310–5322 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Air Jets Gas solids Résumé : This work numerically conducted a comprehensive study on the jet effect of inlet distributor arrangements on the flow structure of gas−solids two-phase flow in circulating fluidized-bed risers. A computational fluid dynamics (CFD) model based on the Eulerian−Eulerian approach coupled with granular kinetics theory was adopted to carry out the simulation. Simulation results were compared with the experimental data. It was found that the inlet distributor has a great effect on the entire flow structure. The numerical results using jet inlet approaches predicted more distinct core-annulus flow structures mimicking the experimental results while the uniform inlet condition predicted a very flat flow structure. The jet effect of the inlet distributor is clearly revealed. A large lateral flow can be seen because of the jet effect. A reasonable CFD model needs to take into account the inlet distributor configuration and consider the jet effect at the inlet. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901902j [article] Numerical study on the effect of the air jets at the inlet distributor in the gas − solids circulating fluidized - bed risers [texte imprimé] / Botao Peng, Auteur ; Jesse Zhu, Auteur ; Chao Zhang, Auteur . - 2010 . - pp. 5310–5322. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 11 (Juin 2010) . - pp. 5310–5322 Mots-clés : Air Jets Gas solids Résumé : This work numerically conducted a comprehensive study on the jet effect of inlet distributor arrangements on the flow structure of gas−solids two-phase flow in circulating fluidized-bed risers. A computational fluid dynamics (CFD) model based on the Eulerian−Eulerian approach coupled with granular kinetics theory was adopted to carry out the simulation. Simulation results were compared with the experimental data. It was found that the inlet distributor has a great effect on the entire flow structure. The numerical results using jet inlet approaches predicted more distinct core-annulus flow structures mimicking the experimental results while the uniform inlet condition predicted a very flat flow structure. The jet effect of the inlet distributor is clearly revealed. A large lateral flow can be seen because of the jet effect. A reasonable CFD model needs to take into account the inlet distributor configuration and consider the jet effect at the inlet. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901902j

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One-step separation of platinum, palladium, and rhodium / Pinhua Yu in Industrial & engineering chemistry research, Vol. 50 N° 15 (Août 2011)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 50 N° 15 (Août 2011) . - pp. 9368-9376 Titre : One-step separation of platinum, palladium, and rhodium : a three-liquid-phase extraction approach Type de document : texte imprimé Auteurs : Pinhua Yu, Auteur ; Kun Huang, Auteur ; Chao Zhang, Auteur Année de publication : 2011 Article en page(s) : pp. 9368-9376 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Liquid phase Résumé : Three-liquid-phase extraction and one-step separation of platinum, palladium, and rhodium in the system composed of diisoamyl sulphide (S201), polyethylene oxide-polypropylene oxide random block copolymer (EOPO), Na2SO4, and H2O were investigated. Experimental results indicated that phase-forming salt type, salt concentrations, coexisting H+ and Cl- concentrations in equilibrious Na2SO4 aqueous solutions have significant influences on the three-liquid-phase partitioning behaviors of Pt(IV), Pd(II), and Rh(III). Under the optimized operation parameters, over 99 wt % of Pd(II), about 90 wt % of Pt(IV), and 85 wt % of Rh(III) in initial feed solutions were respectively concentrated into S201 top phase, EOPO middle phase, and Na2SO4 bottom aqueous phase. The present work explores a possibility to develop a three-liquid-phase extraction approach for one-step separation of platinum metal ions in highly concentrated acidic chloride media obtained by hydrometallurgical processes. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24395882 [article] One-step separation of platinum, palladium, and rhodium : a three-liquid-phase extraction approach [texte imprimé] / Pinhua Yu, Auteur ; Kun Huang, Auteur ; Chao Zhang, Auteur . - 2011 . - pp. 9368-9376. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 15 (Août 2011) . - pp. 9368-9376 Mots-clés : Liquid phase Résumé : Three-liquid-phase extraction and one-step separation of platinum, palladium, and rhodium in the system composed of diisoamyl sulphide (S201), polyethylene oxide-polypropylene oxide random block copolymer (EOPO), Na2SO4, and H2O were investigated. Experimental results indicated that phase-forming salt type, salt concentrations, coexisting H+ and Cl- concentrations in equilibrious Na2SO4 aqueous solutions have significant influences on the three-liquid-phase partitioning behaviors of Pt(IV), Pd(II), and Rh(III). Under the optimized operation parameters, over 99 wt % of Pd(II), about 90 wt % of Pt(IV), and 85 wt % of Rh(III) in initial feed solutions were respectively concentrated into S201 top phase, EOPO middle phase, and Na2SO4 bottom aqueous phase. The present work explores a possibility to develop a three-liquid-phase extraction approach for one-step separation of platinum metal ions in highly concentrated acidic chloride media obtained by hydrometallurgical processes. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24395882

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