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A New mathematical model study on CO2 gasification reaction of typical agricultural residues / Hua Fei in Industrial & engineering chemistry research, Vol. 51 N° 42 (Octobre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 42 (Octobre 2012) . - pp. 13619-13626 Titre : A New mathematical model study on CO2 gasification reaction of typical agricultural residues Type de document : texte imprimé Auteurs : Hua Fei, Auteur ; Song Hu, Auteur ; Faen Shi, Auteur Année de publication : 2012 Article en page(s) : pp. 13619-13626 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Gasification  Carbon  dioxide  Mathematical  model Résumé : In this context, the differential mass conservation equations were used to describe typical noncatalytic gas-solid reactions, such as biomass chars gasification, and an approximate method was applied to solve these equations. The methodology developed in this work was based on an approximate method for decoupling the gas conservation equation. With this strategy, the calculation of gas concentration and solid conversion at any time and position during reaction could be converted to the solution of two coupled algebraic equations. Thereby, a new mathematical model, modified quantize model (MQM), was constructed to describe the gasification rates of biomass chars according to a nonlinear relationship between the porosity and reaction surface of biomass chars when pore diffusion effect is considered. Carbon conversion rates predicted by the MQM were in closer agreement with the experimental data than those predicted by the Rafsanjani model (QM) and discrete random pore model (DRPM). Using the MQM, the gasification process of biomass chars in CO2 at different temperatures was analyzed. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26508185 [article] A New mathematical model study on CO2 gasification reaction of typical agricultural residues [texte imprimé] / Hua Fei, Auteur ; Song Hu, Auteur ; Faen Shi, Auteur . - 2012 . - pp. 13619-13626. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 42 (Octobre 2012) . - pp. 13619-13626 Mots-clés : Gasification  Carbon  dioxide  Mathematical  model Résumé : In this context, the differential mass conservation equations were used to describe typical noncatalytic gas-solid reactions, such as biomass chars gasification, and an approximate method was applied to solve these equations. The methodology developed in this work was based on an approximate method for decoupling the gas conservation equation. With this strategy, the calculation of gas concentration and solid conversion at any time and position during reaction could be converted to the solution of two coupled algebraic equations. Thereby, a new mathematical model, modified quantize model (MQM), was constructed to describe the gasification rates of biomass chars according to a nonlinear relationship between the porosity and reaction surface of biomass chars when pore diffusion effect is considered. Carbon conversion rates predicted by the MQM were in closer agreement with the experimental data than those predicted by the Rafsanjani model (QM) and discrete random pore model (DRPM). Using the MQM, the gasification process of biomass chars in CO2 at different temperatures was analyzed. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26508185