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Experimental studies and rate - based process simulations of CO2 absorption with aqueous ammonia solutions / Zhenqi Niu in Industrial & engineering chemistry research, Vol. 51 N° 14 (Avril 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 14 (Avril 2012) . - pp. 5309-5319 Titre : Experimental studies and rate - based process simulations of CO2 absorption with aqueous ammonia solutions Type de document : texte imprimé Auteurs : Zhenqi Niu, Auteur ; Yincheng Guo, Auteur ; Qing Zeng, Auteur Année de publication : 2012 Article en page(s) : pp. 5309-5319 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Gas  absorption  Carbon  dioxide Résumé : A pilot plant at laboratory scale for absorption of CO2 has been constructed and operated to test the CO2 removal by aqueous ammonia solutions. The design of the pilot plant is based on a standard absorption and desorption flow sheet and partial or complete separation of gas mixtures. Pilot plant data for CO2 removal efficiencies, effects of CO2 loading, and temperature profiles are obtained. A rate-based model, RateFrac in Aspen Plus simulator, is used to simulate the CO2 absorption of the pilot plant. The simulation results of the CO2 capture predicted by the rate-based model are in good agreement with the experimental data of the pilot plant. Further, the optimization covering operational parameters is carried out using the rate-based model. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25783440 [article] Experimental studies and rate - based process simulations of CO2 absorption with aqueous ammonia solutions [texte imprimé] / Zhenqi Niu, Auteur ; Yincheng Guo, Auteur ; Qing Zeng, Auteur . - 2012 . - pp. 5309-5319. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 14 (Avril 2012) . - pp. 5309-5319 Mots-clés : Gas  absorption  Carbon  dioxide Résumé : A pilot plant at laboratory scale for absorption of CO2 has been constructed and operated to test the CO2 removal by aqueous ammonia solutions. The design of the pilot plant is based on a standard absorption and desorption flow sheet and partial or complete separation of gas mixtures. Pilot plant data for CO2 removal efficiencies, effects of CO2 loading, and temperature profiles are obtained. A rate-based model, RateFrac in Aspen Plus simulator, is used to simulate the CO2 absorption of the pilot plant. The simulation results of the CO2 capture predicted by the rate-based model are in good agreement with the experimental data of the pilot plant. Further, the optimization covering operational parameters is carried out using the rate-based model. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25783440

Mass transfer coefficients for CO2 absorption into aqueous ammonia solution using a packed column / Qing Zeng in Industrial & engineering chemistry research, Vol. 50 N° 17 (Septembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 17 (Septembre 2011) . - pp. 10168-10175 Titre : Mass transfer coefficients for CO2 absorption into aqueous ammonia solution using a packed column Type de document : texte imprimé Auteurs : Qing Zeng, Auteur ; Yincheng Guo, Auteur ; Zhenqi Niu, Auteur Année de publication : 2011 Article en page(s) : pp. 10168-10175 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Packed  column  Gas  absorption  Carbon  dioxide  Mass  transfer  Mass  transfer  coefficient Résumé : The absorption of carbon dioxide into aqueous ammonia solution using a packed column was investigated. The volumetric overall mass transfer coefficients (KGaV) for CO2 absorption into aqueous ammonia solutions were evaluated over ranges of main operating variables, that is, up to 15 kpa partial pressure of CO2, 61-214 m3/(m2·h) gas flow rate, 0.76—3.06 m3/(m2·h) liquid flow rate, 2%~16% ammonia mass fraction, and 20-50 °C temperature. An empirical KGaV correlation for this system was proposed. Experimental results show that the mass transfer process in CO2 absorption into aqueous ammonia solution is mainly controlled by the resistance in the liquid phase and the ammonia concentration has a great effect on the overall mass transfer coefficient. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24483660 [article] Mass transfer coefficients for CO2 absorption into aqueous ammonia solution using a packed column [texte imprimé] / Qing Zeng, Auteur ; Yincheng Guo, Auteur ; Zhenqi Niu, Auteur . - 2011 . - pp. 10168-10175. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 17 (Septembre 2011) . - pp. 10168-10175 Mots-clés : Packed  column  Gas  absorption  Carbon  dioxide  Mass  transfer  Mass  transfer  coefficient Résumé : The absorption of carbon dioxide into aqueous ammonia solution using a packed column was investigated. The volumetric overall mass transfer coefficients (KGaV) for CO2 absorption into aqueous ammonia solutions were evaluated over ranges of main operating variables, that is, up to 15 kpa partial pressure of CO2, 61-214 m3/(m2·h) gas flow rate, 0.76—3.06 m3/(m2·h) liquid flow rate, 2%~16% ammonia mass fraction, and 20-50 °C temperature. An empirical KGaV correlation for this system was proposed. Experimental results show that the mass transfer process in CO2 absorption into aqueous ammonia solution is mainly controlled by the resistance in the liquid phase and the ammonia concentration has a great effect on the overall mass transfer coefficient. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24483660