%T Aqueous Potassium Salt of L-Cysteine as Potential CO2 Removal Solvent: An Investigation on Physicochemical Properties and CO2 Loading Capacity
%J Sustainability (Switzerland)
%A T.N.A. Tengku Hassan
%A A. Mohd Shariff
%A N.F. Abd Aziz
%A N.F.A. Mustafa
%A L.S. Tan
%A H.N. Abdul Halim
%A M. Mohamed
%A H. Hermansyah
%R 10.3390/su151511558
%N 15
%X The operational and economic constraints suffered by amine solvents for CO2 removal have motivated the research on an alternative solvent with better performance and cost-effectiveness. Amino acid salt (AAS) has been identified as an interesting green solvent, an alternative to commercial amine solvents. The present work evaluated the physicochemical and CO2-solubility properties of potassium L-cysteine (K-CYS), a naturally occurring amino-acid-based solvent for CO2 removal from natural gas. Its physicochemical properties, including density, viscosity, and refractive index, were measured at different temperatures ranging between 298.15 and 333.15 K and a concentration range of 5 to 30 wt.. Based on the experiment, all properties were found to decrease with increasing temperature and increase with increasing concentration. The experiments also demonstrated a significant reduction of CO2 loading from 2.4190 to 1.1802 mol of CO2/mol of K-CYS with increasing solvent concentration from 10 to 30 wt at 313.15 K and 20 bar (g). © 2023 by the authors.
%L scholars18354
%D 2023
%V 15
%O cited By 1
%K absorption; amino acid; aqueous solution; carbon dioxide; physicochemical property; pollutant removal; salt; solvent