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Modeling of NO removal over CuO/γ-Al2O3 catalyst in a bubbling fluidized bed reactor / Muhammad F. Irfan in Industrial & engineering chemistry research, Vol. 48 N° 17 (Septembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 17 (Septembre 2009) . - pp. 7959–7964 Titre : Modeling of NO removal over CuO/γ-Al2O3 catalyst in a bubbling fluidized bed reactor Type de document : texte imprimé Auteurs : Muhammad F. Irfan, Auteur ; Sang Done Kim, Auteur ; Muhammad R. Usman, Auteur Année de publication : 2009 Article en page(s) : pp. 7959–7964 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : CuO/γ-Al2O3  catalyst  Bubbling  fluidized  bed  reactor Résumé : The NO reduction over CuO/γ-Al2O3 catalyst in a bubbling fluidized bed reactor has been determined on the basis of the two-phase model at the maximum conversion temperature of 300 °C. This temperature is critical as it deals maximum conversion, NH3 adsorption/desorption, and NH3 oxidation, which also takes place above this temperature and hence causes a decrease of NO reduction. The effects of superficial gas velocity (ug), [NH3]/[NO] molar ratio, and the static bed height (hs) on the reduction efficiency of NO over CuO/γ-Al2O3 as a bed material in a fluidized bed reactor with variation of reaction temperatures (rate constant, kr) have been determined, and a model has been developed for the NO removal process in a bubbling fluidized bed using the two-phase theory. The results are compared with the simulation results obtained through the Maple and MATLAB simulation tools. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8018214 [article] Modeling of NO removal over CuO/γ-Al2O3 catalyst in a bubbling fluidized bed reactor [texte imprimé] / Muhammad F. Irfan, Auteur ; Sang Done Kim, Auteur ; Muhammad R. Usman, Auteur . - 2009 . - pp. 7959–7964. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 17 (Septembre 2009) . - pp. 7959–7964 Mots-clés : CuO/γ-Al2O3  catalyst  Bubbling  fluidized  bed  reactor Résumé : The NO reduction over CuO/γ-Al2O3 catalyst in a bubbling fluidized bed reactor has been determined on the basis of the two-phase model at the maximum conversion temperature of 300 °C. This temperature is critical as it deals maximum conversion, NH3 adsorption/desorption, and NH3 oxidation, which also takes place above this temperature and hence causes a decrease of NO reduction. The effects of superficial gas velocity (ug), [NH3]/[NO] molar ratio, and the static bed height (hs) on the reduction efficiency of NO over CuO/γ-Al2O3 as a bed material in a fluidized bed reactor with variation of reaction temperatures (rate constant, kr) have been determined, and a model has been developed for the NO removal process in a bubbling fluidized bed using the two-phase theory. The results are compared with the simulation results obtained through the Maple and MATLAB simulation tools. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8018214

Thermogravimetric analysis of copper oxide for chemical-looping hydrogen generation / Sung Real Son in Industrial & engineering chemistry research, Vol. 48 N°1 (Janvier 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N°1 (Janvier 2009) . - P. 380-387 Titre : Thermogravimetric analysis of copper oxide for chemical-looping hydrogen generation Type de document : texte imprimé Auteurs : Sung Real Son, Editeur scientifique ; Kang Seok Go, Editeur scientifique ; Sang Done Kim, Editeur scientifique Année de publication : 2009 Article en page(s) : P. 380-387 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Thermogravimetric  Copper  Oxide  Chemical-Looping  Metal  oxide Résumé : The chemical-looping hydrogen generation (CLH) system consists of reduction of metal oxide and water decomposition by oxidizing reduced metal oxide. In the present study, water decomposition by the reduction and oxidation of metal oxide (CuO) was conducted in a thermogravimetric analysis (TGA) system for the CLH process. The particles are reduced completely in an atmosphere of synthesis gas (H2 + CO), and the fully reduced particles decompose water to produce 3.7 L of H2 per kilogram of metal oxide. The particles prepared by the impregnation exhibits better reactivity than those by coprecipitation and the solid phase method, and the particles supported on Al2O3 exhibit better reactivity than those on SiO2. Based on the TGA, the reduction and oxidation of CuO/Al2O3 prepared via impregnation are characterized by the kinetic equations from the solid-state reaction rate models. The phase-controlled-boundary model was successfully applied to predict the initial stages of reduction and oxidation of the metal oxide, and the activation energies for reduction and oxidation are determined to be 4.13−19.5 and −55.8 kJ/mol, respectively. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800174c [article] Thermogravimetric analysis of copper oxide for chemical-looping hydrogen generation [texte imprimé] / Sung Real Son, Editeur scientifique ; Kang Seok Go, Editeur scientifique ; Sang Done Kim, Editeur scientifique . - 2009 . - P. 380-387. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°1 (Janvier 2009) . - P. 380-387 Mots-clés : Thermogravimetric  Copper  Oxide  Chemical-Looping  Metal  oxide Résumé : The chemical-looping hydrogen generation (CLH) system consists of reduction of metal oxide and water decomposition by oxidizing reduced metal oxide. In the present study, water decomposition by the reduction and oxidation of metal oxide (CuO) was conducted in a thermogravimetric analysis (TGA) system for the CLH process. The particles are reduced completely in an atmosphere of synthesis gas (H2 + CO), and the fully reduced particles decompose water to produce 3.7 L of H2 per kilogram of metal oxide. The particles prepared by the impregnation exhibits better reactivity than those by coprecipitation and the solid phase method, and the particles supported on Al2O3 exhibit better reactivity than those on SiO2. Based on the TGA, the reduction and oxidation of CuO/Al2O3 prepared via impregnation are characterized by the kinetic equations from the solid-state reaction rate models. The phase-controlled-boundary model was successfully applied to predict the initial stages of reduction and oxidation of the metal oxide, and the activation energies for reduction and oxidation are determined to be 4.13−19.5 and −55.8 kJ/mol, respectively. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800174c