Effect of Water on Solubility of Carbon Dioxide in (Aminomethanamide + 2-Hydroxy-N,N,N-trimethylethanaminium Chloride)

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• 作者：Wen Cheng Su ; David Shan Hill Wong ; Meng Hui Li
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2009
• 出版时间：June 11, 2009
• 年：2009
• 卷：54
• 期：6
• 页码：1951-1955
• 全文大小：136K
• 年卷期：v.54,no.6(June 11, 2009)
• ISSN：1520-5134

文摘

In this study, the densities of (aminomethanamide + 2-hydroxy-N,N,N-trimethylethanaminium chloride + water) and the solubilities of CO<sub>2sub> in (aminomethanamide + 2-hydroxy-N,N,N-trimethylethanaminium chloride) with different varying mole fractions of water at temperatures of (303, 308, and 313) K are reported. The common name for (aminomethanamide + 2-hydroxy-N,N,N-trimethylethanaminium chloride) is reline. The densities are linear (AAD % is 0.22 %) with respect to reline mass fraction at each temperature. The logarithms of Henry’s law constants were correlated using the two-suffix Margules model as a function of reline mole fraction with an AAD of 3.44 %. The results showed that CO<sub>2sub> solubility in reline decrease with an increase water content. Hence water can serve as an antisolvent to strip CO<sub>2sub> dissolved in reline. The absorption of CO<sub>2sub> in (aminomethanamide + 2-hydroxy-N,N,N-trimethylethanaminium chloride + water) at low pressures is found to be endothermic at water content. However, the absorption becomes exothermic if the water content increases to a mole fraction greater than 0.769.