ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Physical properties of aqueous solutions of potassium l-prolinate from 298.15 to 343.15 K at atmospheric pressure

M. S. Shaikh, A. M. Shariff, Sahil Garg, and M. A. Bustam

Research Center for CO2 Capture (RCCO2C), Department of Chemical Engineering, Universiti Teknologi PETRONAS, Tronoh, Malaysia

E-mail: azmish@petronas.com.my

Abstract: In this paper, experimental physical properties such as density, refractive index, and viscosity of aqueous potassium l-prolinate (KPr) as a solvent for CO₂ capture were investigated. Different concentrations of aqueous KPr in terms of mass fractions (0.05, 0.10, 0.20, 0.30, and 0.40) were studied over a temperature range 298.15–343.15 K. The obtained results showed that all physical properties increase with increasing the concentration of the solution (isothermally), and decrease as the solution temperature rises for any given concentration. The experimental data of density, refractive index, and viscosity were correlated using empirical correlations as a function of both, temperature and concentration. Coefficient of thermal expansion and activation energy were calculated from the experimental density and viscosity data, respectively, in the same temperature range. Thermal expansion coefficient slightly increases with increase in the temperature and concentration, while activation energy increases with the rise in concentration of amino acid salt.

Keywords: Density; Viscosity; Refractive index; Aqueous solution; Potassium

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-016-0111-6

Chemical Papers 71 (7) 1185–1194 (2017)