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Kinetic model for parallel reactions of CaSO4 with CO in chemical-looping combustion / Min Zheng in Industrial & engineering chemistry research, Vol. 50 N° 9 (Mai 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 9 (Mai 2011) . - pp. 5414-5427 Titre : Kinetic model for parallel reactions of CaSO4 with CO in chemical-looping combustion Type de document : texte imprimé Auteurs : Min Zheng, Auteur ; Laihong Shen, Auteur ; Xiaoqiong Feng, Auteur Année de publication : 2011 Article en page(s) : pp. 5414-5427 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Modeling  Combustion  Parallel  reaction  Kinetic  model Résumé : Chemical-looping Combustion (CLC) has been proposed as an energy-efficient combustion method for in situ capture of CO2. Kinetic model for parallel reactions of the CaSO4 oxygen carrier with CO in a CLC process is explored in this paper. Tests on an isothermal reaction were carried out in a Thermogravimetric Analyzer coupled with Fourier Transform Infrared spectrum (TGA-FTIR), and the instantaneous evolutions of SO2 and COS were monitored by the FTIR quantitative analysis. The reaction temperature was varied between 850 and 1050°C, while 5-28% CO concentrations were utilized. The experiments showed that the reduction of CaSO4 by CO was a complex process, with the products of either sole CaS or both CaS and CaO depending on the reaction temperature as well as the concentration of CO reactant. The parallel reactions of CaSO4 with CO were investigated in terms of the selectivity based on the nucleation and growth model under isothermal conditions. According to the fitting results, the nucleation and growth model fit well the conversion-time data, and some of the kinetic parameters were obtained. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24128664 [article] Kinetic model for parallel reactions of CaSO4 with CO in chemical-looping combustion [texte imprimé] / Min Zheng, Auteur ; Laihong Shen, Auteur ; Xiaoqiong Feng, Auteur . - 2011 . - pp. 5414-5427. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 9 (Mai 2011) . - pp. 5414-5427 Mots-clés : Modeling  Combustion  Parallel  reaction  Kinetic  model Résumé : Chemical-looping Combustion (CLC) has been proposed as an energy-efficient combustion method for in situ capture of CO2. Kinetic model for parallel reactions of the CaSO4 oxygen carrier with CO in a CLC process is explored in this paper. Tests on an isothermal reaction were carried out in a Thermogravimetric Analyzer coupled with Fourier Transform Infrared spectrum (TGA-FTIR), and the instantaneous evolutions of SO2 and COS were monitored by the FTIR quantitative analysis. The reaction temperature was varied between 850 and 1050°C, while 5-28% CO concentrations were utilized. The experiments showed that the reduction of CaSO4 by CO was a complex process, with the products of either sole CaS or both CaS and CaO depending on the reaction temperature as well as the concentration of CO reactant. The parallel reactions of CaSO4 with CO were investigated in terms of the selectivity based on the nucleation and growth model under isothermal conditions. According to the fitting results, the nucleation and growth model fit well the conversion-time data, and some of the kinetic parameters were obtained. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24128664