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13C NMR spectroscopy of a novel amine species in the DEAB–CO2–H2O system / Huancong Shi in Industrial & engineering chemistry research, Vol. 51 N° 25 (Juin 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 25 (Juin 2012) . - pp. 8608–8615 Titre : 13C NMR spectroscopy of a novel amine species in the DEAB–CO2–H2O system : VLE model Type de document : texte imprimé Auteurs : Huancong Shi, Auteur ; Teerawat Sema, Auteur ; Abdulaziz Naami, Auteur Année de publication : 2012 Article en page(s) : pp. 8608–8615 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Spectroscopy Résumé : In the present work, ion speciation studies in solutions of the novel amine 4-(diethylamine)-2-butanol (DEAB), at various CO2 loadings (0–0.8 mol of CO2/mol of amine) and amine concentrations (0.52–1.97 M), were determined by 13C nuclear magnetic resonance (NMR) spectroscopy. In addition, the dissociation constant K of DEABH+ was determined at 24.5, 35, and 45 °C using a pH meter. The ion speciation plot, which contains various sets of concentrations of DEAB, protonated DEAB, bicarbonate, and carbonate, was successfully generated. Because DEAB is a novel solvent, this is the first time that the ion speciation plots of the DEAB–CO2–H2O system have been developed. It is also the first time that the 13C NMR calibration technique was applied to develop the vapor–liquid equilibrium (VLE) model for an amine–CO2–H2O system. The results obtained from the present work can be a great help for the further analysis of the DEAB VLE model, as well as CO2 absorption and kinetics studies. Furthermore, it was found that the novel 13C NMR calibration technique developed in this work provides higher accuracy than the conventional technique. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300358c [article] 13C NMR spectroscopy of a novel amine species in the DEAB–CO2–H2O system : VLE model [texte imprimé] / Huancong Shi, Auteur ; Teerawat Sema, Auteur ; Abdulaziz Naami, Auteur . - 2012 . - pp. 8608–8615. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 25 (Juin 2012) . - pp. 8608–8615 Mots-clés : Spectroscopy Résumé : In the present work, ion speciation studies in solutions of the novel amine 4-(diethylamine)-2-butanol (DEAB), at various CO2 loadings (0–0.8 mol of CO2/mol of amine) and amine concentrations (0.52–1.97 M), were determined by 13C nuclear magnetic resonance (NMR) spectroscopy. In addition, the dissociation constant K of DEABH+ was determined at 24.5, 35, and 45 °C using a pH meter. The ion speciation plot, which contains various sets of concentrations of DEAB, protonated DEAB, bicarbonate, and carbonate, was successfully generated. Because DEAB is a novel solvent, this is the first time that the ion speciation plots of the DEAB–CO2–H2O system have been developed. It is also the first time that the 13C NMR calibration technique was applied to develop the vapor–liquid equilibrium (VLE) model for an amine–CO2–H2O system. The results obtained from the present work can be a great help for the further analysis of the DEAB VLE model, as well as CO2 absorption and kinetics studies. Furthermore, it was found that the novel 13C NMR calibration technique developed in this work provides higher accuracy than the conventional technique. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300358c

Correlations for equilibrium solubility of carbon dioxide in aqueous 4 - (Diethylamino) - 2 - butanol solutions / Teerawat Sema in Industrial & engineering chemistry research, Vol. 50 N° 24 (Décembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 24 (Décembre 2011) . - pp. 14008-14015 Titre : Correlations for equilibrium solubility of carbon dioxide in aqueous 4 - (Diethylamino) - 2 - butanol solutions Type de document : texte imprimé Auteurs : Teerawat Sema, Auteur ; Abdulaziz Naami, Auteur ; Raphael Idem, Auteur Année de publication : 2012 Article en page(s) : pp. 14008-14015 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Carbon  dioxide  Solubility  Correlation  analysis  Correlation Résumé : The experimental results of the equilibrium solubility of CO2 in aqueous 4-(diethylamino)-2-butanol (DEAB) solutions are reported over the temperature range of 298–333 K, CO2 partial pressure range of 10–100 kPa, and DEAB concentration range of 1–2.5 M. These results were then used to calculate, with the help of various thermodynamic models, the equilibrium solubility constant of CO2 in aqueous DEAB solutions as a function of various operating parameters. Subsequently, data for the chemical equilibrium constant that governs the CO2–DEAB–water reaction were fitted to the correlation models of Kent–Eisenberg, Austgen, Li–Shen, and Hu–Chakma and used to predict the equilibrium solubility as a function of temperature and CO2 partial pressure. The results show that these models did not represent the CO2 equilibrium solubility in aqueous DEAB solution very well, with absolute average deviations of 7.3%, 7.3%, 7.1%, and 8.3%, respectively. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25299869 [article] Correlations for equilibrium solubility of carbon dioxide in aqueous 4 - (Diethylamino) - 2 - butanol solutions [texte imprimé] / Teerawat Sema, Auteur ; Abdulaziz Naami, Auteur ; Raphael Idem, Auteur . - 2012 . - pp. 14008-14015. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 24 (Décembre 2011) . - pp. 14008-14015 Mots-clés : Carbon  dioxide  Solubility  Correlation  analysis  Correlation Résumé : The experimental results of the equilibrium solubility of CO2 in aqueous 4-(diethylamino)-2-butanol (DEAB) solutions are reported over the temperature range of 298–333 K, CO2 partial pressure range of 10–100 kPa, and DEAB concentration range of 1–2.5 M. These results were then used to calculate, with the help of various thermodynamic models, the equilibrium solubility constant of CO2 in aqueous DEAB solutions as a function of various operating parameters. Subsequently, data for the chemical equilibrium constant that governs the CO2–DEAB–water reaction were fitted to the correlation models of Kent–Eisenberg, Austgen, Li–Shen, and Hu–Chakma and used to predict the equilibrium solubility as a function of temperature and CO2 partial pressure. The results show that these models did not represent the CO2 equilibrium solubility in aqueous DEAB solution very well, with absolute average deviations of 7.3%, 7.3%, 7.1%, and 8.3%, respectively. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25299869

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