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Modeling study on absorption of CO2 by aqueous solutions of N-methyldiethanolamine in rotating packed bed / Zhi Qian in Industrial & engineering chemistry research, Vol. 48 N° 20 (Octobre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 20 (Octobre 2009) . - pp. 9261–9267 Titre : Modeling study on absorption of CO2 by aqueous solutions of N-methyldiethanolamine in rotating packed bed Type de document : texte imprimé Auteurs : Zhi Qian, Auteur ; Lianbin Xu, Auteur ; Huibo Cao, Auteur Année de publication : 2010 Article en page(s) : pp. 9261–9267 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : CO2  absorption  N-methyldiethanolamine  Rotating  packed  bed Résumé : The work presents a theoretical investigation of the absorption of CO2 by aqueous solutions of N-methyldiethanolamine (MDEA) in a rotating packed bed (RPB). The diffusion-reaction process for CO2-MDEA mass transfer in RPB is modeled according to Higbie’s penetration theory with the assumption that all reactions are reversible. A three-dimensional distribution of carbon dioxide concentration varying with the time and penetration depth in liquid film and an average mass transfer rate at interface are obtained. The intensification within the RPB is mainly achieved by the sharper concentration profile of the dissolvable gas in liquid film; the short lifetime of liquid film resulting from frequent renewal of the film on packing surface significantly increases the mass transfer coefficient. Experiments were carried out at various rotating speeds, liquid flow rates, and temperatures in RPB. The validity of this model is demonstrated by the fact that most of the predicted yout (mole fraction of CO2 in outlet gas) agree well with the experimental data with a deviation within 4%. Besides, this study makes a quantitative comparison between dynamic- and static-state mass transfer coefficients for this reactive absorption and a discussion on their applicability. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900894a [article] Modeling study on absorption of CO2 by aqueous solutions of N-methyldiethanolamine in rotating packed bed [texte imprimé] / Zhi Qian, Auteur ; Lianbin Xu, Auteur ; Huibo Cao, Auteur . - 2010 . - pp. 9261–9267. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 20 (Octobre 2009) . - pp. 9261–9267 Mots-clés : CO2  absorption  N-methyldiethanolamine  Rotating  packed  bed Résumé : The work presents a theoretical investigation of the absorption of CO2 by aqueous solutions of N-methyldiethanolamine (MDEA) in a rotating packed bed (RPB). The diffusion-reaction process for CO2-MDEA mass transfer in RPB is modeled according to Higbie’s penetration theory with the assumption that all reactions are reversible. A three-dimensional distribution of carbon dioxide concentration varying with the time and penetration depth in liquid film and an average mass transfer rate at interface are obtained. The intensification within the RPB is mainly achieved by the sharper concentration profile of the dissolvable gas in liquid film; the short lifetime of liquid film resulting from frequent renewal of the film on packing surface significantly increases the mass transfer coefficient. Experiments were carried out at various rotating speeds, liquid flow rates, and temperatures in RPB. The validity of this model is demonstrated by the fact that most of the predicted yout (mole fraction of CO2 in outlet gas) agree well with the experimental data with a deviation within 4%. Besides, this study makes a quantitative comparison between dynamic- and static-state mass transfer coefficients for this reactive absorption and a discussion on their applicability. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900894a