Physicochemical Properties of Aqueous Potassium Salts of Basic Amino Acids as Absorbents for CO2 Capture

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• 作者：Yangyang Bian ; Shufeng Shen ; Yue Zhao ; Ya-nan Yang
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2016
• 出版时间：July 14, 2016
• 年：2016
• 卷：61
• 期：7
• 页码：2391-2398
• 全文大小：520K
• 年卷期：0
• ISSN：1520-5134

文摘

Aqueous amino acid salt (AAS) solutions could be attractive absorbents for CO₂ removal from flue gases. Density, viscosity, and solubility of N₂O in aqueous potassium salts of lysine, histidine, and arginine were measured over the temperature range from (293 to 353) K and molality concentration range from (0.26 to 3.6) mol·kg^–1. Experimental results were correlated well with empirical correlations. The ion specific parameters (h_AA^–), based on the Weisenberger and Schumpe model, were fitted using the solubility data of N₂O in the aforementioned AAS systems, valid up to 328 K. The models using temperature dependence of h_AA^– predict well within 2.5% AAD. The physical solubility of CO₂ in the aqueous AAS solutions was also estimated.