Work

Terpene-Derived Low-Viscosity Deep Eutectic Solvent for Energy-Efficient CO 2 Absorption

Year: 2025

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide Deep eutectic solvent (DES) is considered an attractive solution for mass transfer operations due to its favorable vapor pressure and physicochemical properties. This study investigated the CO 2 absorption capacity of a type V hydrophobic natural DES (HNDES) having camphor (CAM) and menthol (MEN) as HBAs and HBDs, respectively. The HNDES was prepared at a 4:7 molar ratio and obtained from the Conductor-like Screening Model for Real Solvents. The properties, namely, viscosity, vapor pressure, boiling point, and flash point, were measured. The solvent’s viscosity was found to be 23 mPa.s at 298.15 K. The CO 2 solubility was investigated at a temperature range of 298.15–323.15 K. The operating pressure was varied from 0.2 to 0.6 MPa. The highest mole fraction of CO 2 in the solvent was observed to be 0.044 at 303.15 K and 0.6 MPa. The enthalpy of absorption (−14.7 kJ.mol –1 ) indicates a decrease in solubility at elevated temperature. Moreover, the CO 2 physisorption was also validated by FTIR, Raman, and NMR analysis.

Source: ACS Omega

DOI: 10.1021/acsomega.5c06033

Authors: Sinchan Hait, Upasana Mahanta

Institutions: Birla Institute of Technology and Science, Pilani - Goa Campus, Birla Institute of Technology and Science, Pilani

Language: English

Topic: Ionic liquids properties and applications

Subfield: Catalysis

Field: Chemical Engineering

Domain: Physical Sciences

SDG: Climate action

Open Access status: gold

Estimated APC paid: $1,935