Journal article · Preprint article
VLE of Carbon Dioxide-Loaded Aqueous Potassium Salt of L -Histidine Solutions as a Green Solvent for Carbon Dioxide Capture: Experimental Data and Modelling
Universiti Teknologi Petronas1
Department of Chemical and Biochemical Engineering, Technical University of Denmark2
CERE – Center for Energy Ressources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark3
Center for Energy Resources Engineering, Centers, Technical University of Denmark4
In this study, vapour-liquid equilibrium of CO2-loaded aqueous potassium salt of L-histidine was studied for a wide range of temperature (313.15-353.15 K), pressure (150-4000 kPa), and solvent concentrations (1-2.5 molar). The experimental results show that L-histidine has an excellent absorptive capacity for carbon dioxide.
When compared to conventional solvent (monoethanolamine) and amino acid salt (potassium L-lysinate) at similar process conditions, L-histidine has superior absorption capacity. Moreover, modified Kent-Eisenberg model was used to correlate the VLE of the studied system with excellent agreement between the model and experimental values.
The model exhibited an AARE% of 7.87%, which shows that it can satisfactorily predict carbon dioxide solubilities in aqueous potassium salt of L-histidine at other process conditions. Being a biological component in origin, almost negligibly volatile, and highly resistant to oxidative degradation, L-histidine offers certain operational advantages over other solvents used and has a promising potential for carbon dioxide capture.
| Language: | English |
|---|---|
| Publisher: | International Journal of Chemical Engineering |
| Year: | 2019 |
| ISSN: | 16878078 , 1687806x , 21945748 and 15426580 |
| Types: | Journal article and Preprint article |
| DOI: | 10.1155/2019/9428638 |
| ORCIDs: | Suleman, Humbul |
