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- Title
Aqueous Potassium Salt of L-Cysteine as Potential CO 2 Removal Solvent: An Investigation on Physicochemical Properties and CO 2 Loading Capacity.
- Authors
Tengku Hassan, Tengku Nur Adibah; Mohd Shariff, Azmi; Abd Aziz, Nor Faiqa; Mustafa, Nur Farhana Ajua; Tan, Lian See; Abdul Halim, Hairul Nazirah; Mohamed, Mustakimah; Hermansyah, Heri
- Abstract
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).
- Subjects
POTASSIUM salts; CYSTEINE; CARBON dioxide; REFRACTIVE index; NATURAL gas
- Publication
Sustainability (2071-1050), 2023, Vol 15, Issue 15, p11558
- ISSN
2071-1050
- Publication type
Article
- DOI
10.3390/su151511558