Correlations for Equilibrium Solubility of Carbon Dioxide in Aqueous 4-(Diethylamino)-2-butanol Solutions

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• 作者：Teerawat Sema ; Abdulaziz Naami ; Raphael Idem ; Paitoon Tontiwachwuthikul
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2011
• 出版时间：December 21, 2011
• 年：2011
• 卷：50
• 期：24
• 页码：14008-14015
• 全文大小：848K
• 年卷期：v.50,no.24(December 21, 2011)
• ISSN：1520-5045

文摘

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鈥?33 K, CO₂ partial pressure range of 10鈥?00 kPa, and DEAB concentration range of 1鈥?.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鈥揇EAB鈥搘ater reaction were fitted to the correlation models of Kent鈥揈isenberg, Austgen, Li鈥揝hen, and Hu鈥揅hakma 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.