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Mass transfer performance of CO2 absorption into aqueous solutions of 4 - diethylamino - 2 - butanol, monoethanolamine, and N - methyldiethanolamine / Abdulaziz Naami in Industrial & engineering chemistry research, Vol. 51 N° 18 (Mai 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 18 (Mai 2012) . - pp. 6470-6479 Titre : Mass transfer performance of CO2 absorption into aqueous solutions of 4 - diethylamino - 2 - butanol, monoethanolamine, and N - methyldiethanolamine Type de document : texte imprimé Auteurs : Abdulaziz Naami, Auteur ; Mohamed Edali, Auteur ; Teerawat Sema, Auteur Année de publication : 2012 Article en page(s) : pp. 6470-6479 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Aqueous  solution  Gas  absorption  Carbon  dioxide  Mass  transfer Résumé : The mass transfer performance of the absorption of CO2 in an aqueous solution of monoethanolamine was evaluated experimentally in a lab-scale absorber packed with high efficiency DX structured packing and compared with that of methyldiethanolamine (MDEA) as well as that of a newly developed tertiary amino alcohol, 4-diethylamino-2-butanol (DEAB). The absorption experiments were conducted at atmospheric pressure, using a feed gas mixture containing 14.9% CO2 and 85.1% nitrogen in an absorption column containing DX structured packing. The absorption performance was presented in terms of the CO2 removal efficiency, absorber height requirement, effective interfacial area for mass transfer, and overall mass-transfer coefficient (KGav). In particular, the effects of parameters such as inert gas flow rate and liquid flow rate were compared for both DEAB and MDEA. The results show that the DEAB has a much higher removal efficiency for CO2 along the height of the column than MDEA. Also, the KGav of DEAB was much higher than that for MDEA. For all the solvents, the KGav, increased as the liquid flow rate was increased. An empirical correlation for the mass transfer coefficient for the CO2-DEAB system has been developed as a function of the process parameters. In terms of comparison, the results show that the DEAB system provided an excellent overall mass transfer coefficient, which is higher than that of the MDEA system but less than that of MEA. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25867298 [article] Mass transfer performance of CO2 absorption into aqueous solutions of 4 - diethylamino - 2 - butanol, monoethanolamine, and N - methyldiethanolamine [texte imprimé] / Abdulaziz Naami, Auteur ; Mohamed Edali, Auteur ; Teerawat Sema, Auteur . - 2012 . - pp. 6470-6479. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 18 (Mai 2012) . - pp. 6470-6479 Mots-clés : Aqueous  solution  Gas  absorption  Carbon  dioxide  Mass  transfer Résumé : The mass transfer performance of the absorption of CO2 in an aqueous solution of monoethanolamine was evaluated experimentally in a lab-scale absorber packed with high efficiency DX structured packing and compared with that of methyldiethanolamine (MDEA) as well as that of a newly developed tertiary amino alcohol, 4-diethylamino-2-butanol (DEAB). The absorption experiments were conducted at atmospheric pressure, using a feed gas mixture containing 14.9% CO2 and 85.1% nitrogen in an absorption column containing DX structured packing. The absorption performance was presented in terms of the CO2 removal efficiency, absorber height requirement, effective interfacial area for mass transfer, and overall mass-transfer coefficient (KGav). In particular, the effects of parameters such as inert gas flow rate and liquid flow rate were compared for both DEAB and MDEA. The results show that the DEAB has a much higher removal efficiency for CO2 along the height of the column than MDEA. Also, the KGav of DEAB was much higher than that for MDEA. For all the solvents, the KGav, increased as the liquid flow rate was increased. An empirical correlation for the mass transfer coefficient for the CO2-DEAB system has been developed as a function of the process parameters. In terms of comparison, the results show that the DEAB system provided an excellent overall mass transfer coefficient, which is higher than that of the MDEA system but less than that of MEA. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25867298

Solubility and diffusivity of N2O in aqueous 4 - (Diethylamino) - 2 - butanol solutions for use in postcombustion CO2 capture / Teerawat Sema in Industrial & engineering chemistry research, Vol. 51 N° 2 (Janvier 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 2 (Janvier 2012) . - pp. 925-930 Titre : Solubility and diffusivity of N2O in aqueous 4 - (Diethylamino) - 2 - butanol solutions for use in postcombustion CO2 capture Type de document : texte imprimé Auteurs : Teerawat Sema, Auteur ; Mohamed Edali, Auteur ; Abdulaziz Naami, Auteur Année de publication : 2012 Article en page(s) : pp. 925-930 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Carbon  dioxide  Diffusion  coefficient  Solubility Résumé : In this work, the solubility and diffusivity of nitrous oxide (N2O) in aqueous 4-(diethylamino)-2-butanol (DEAB) solutions were measured. Solubility was measured in a stirred cell reactor over the temperature range of 298―343 K and concentration range of 0.68―3.77 M. On the other hand, diffusivity was measured in a laminar jet absorber over the temperature range of 298―318 K and concentration range of 1.0―2.5 M. An attempt was made to correlate the solubility data with well-known models (semiempirical model, Redlich―Kister equation, and polynomial model). It was observed that only the polynomial model correlated the solubility of N2O in aqueous DEAB solution satisfactorily with an AAD of 0.1%. Similarly, an attempt was made to correlate the diffusivity data with well-known models (semiempirical model and modified Stokes-Einstein model). The semiempirical model provided better predicted N2O diffusivity data compared with the experimental data with an AAD of 3.4%. These data can then be used to determine the physical solubility and physical diffusivity of carbon dioxide (CO2) in aqueous DEAB solutions using the "N2O analogy". DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25476425 [article] Solubility and diffusivity of N2O in aqueous 4 - (Diethylamino) - 2 - butanol solutions for use in postcombustion CO2 capture [texte imprimé] / Teerawat Sema, Auteur ; Mohamed Edali, Auteur ; Abdulaziz Naami, Auteur . - 2012 . - pp. 925-930. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 2 (Janvier 2012) . - pp. 925-930 Mots-clés : Carbon  dioxide  Diffusion  coefficient  Solubility Résumé : In this work, the solubility and diffusivity of nitrous oxide (N2O) in aqueous 4-(diethylamino)-2-butanol (DEAB) solutions were measured. Solubility was measured in a stirred cell reactor over the temperature range of 298―343 K and concentration range of 0.68―3.77 M. On the other hand, diffusivity was measured in a laminar jet absorber over the temperature range of 298―318 K and concentration range of 1.0―2.5 M. An attempt was made to correlate the solubility data with well-known models (semiempirical model, Redlich―Kister equation, and polynomial model). It was observed that only the polynomial model correlated the solubility of N2O in aqueous DEAB solution satisfactorily with an AAD of 0.1%. Similarly, an attempt was made to correlate the diffusivity data with well-known models (semiempirical model and modified Stokes-Einstein model). The semiempirical model provided better predicted N2O diffusivity data compared with the experimental data with an AAD of 3.4%. These data can then be used to determine the physical solubility and physical diffusivity of carbon dioxide (CO2) in aqueous DEAB solutions using the "N2O analogy". DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25476425