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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