VLE of Carbon Dioxide-Loaded Aqueous Potassium Salt of L-Histidine Solutions as a Green Solvent for Carbon Dioxide Capture: Experimental Data and Modelling

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 ca...

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Bibliographic Details
Published inInternational Journal of Chemical Engineering Vol. 2019; no. 2019; pp. 1 - 11
Main Authors Md Nordin, Nik Abdul Hadi, Suleman, Humbul, Maulud, Abdulhalim Shah, Syalsabila, Afaf
Format Journal Article
LanguageEnglish
Published Cairo, Egypt Hindawi Publishing Corporation 01.01.2019
Hindawi
Hindawi Limited
Wiley
Subjects
Absorptivity
Amino acids
Aqueous solutions
Biological activity
Carbon dioxide
Carbon sequestration
Correlation analysis
Equilibrium
Histidine
Kinetics
Liquid-vapor equilibrium
Monoethanolamine (MEA)
Natural gas
Oxidation resistance
Potassium
Potassium salts
Salt
Sodium
Solvents
Studies
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Summary: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.
ISSN:1687-806X
1687-8078
DOI:10.1155/2019/9428638