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

• DOI: 10.1021/acs.jced.6b00013
• Publication Date: 2016-06-07T15:08:38Z
• Authors: Yangyang Bian; Shufeng Shen; Yue Zhao; Ya-nan Yang
• Keywords: Molality

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 lysine, histidine, arginine were measured over the temperature range (293 to 353) K molality concentration (0.26 3.6) mol·kg–1. Experimental results correlated well with empirical correlations. The ion specific parameters (hAA–), based on Weisenberger Schumpe model, fitted using data aforementioned AAS systems, valid up 328 K. models dependence hAA– predict within 2.5% AAD. physical was also estimated.