TY - JOUR
T1 - Carbon dioxide solubility in amine-based deep eutectic solvents
T2 - Experimental and theoretical investigation
AU - Pishro, Khatereh Ali
AU - Murshid, Ghulam
AU - Mjalli, Farouq Sabri
AU - Naser, Jamil
N1 - Funding Information:
We would like to thank and acknowledge Sultan Qaboos University, Oman for providing all the financial and technical support to complete this work.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2021/3/1
Y1 - 2021/3/1
N2 - In this work, ammonium-based Deep Eutectic Solvents (DES) were successfully synthesized using Ethanol amine hydrochloride, and tetraethylenepenta amine (EAHC-TEPA) as a hydrogen bond donor (HBD) with the molar ratios of 1:1, 1:3, 1:6, and 1:9. Carbon dioxide (CO2) solubility was measured in the synthesized DESs above ratios at different pressures and temperatures. The molar ratio of 1:9 showed the best solubility for CO2 among other ratios and was chosen for more in-depth investigation in this work. Solubility data was correlated using response surface methodology (RSM) and ANOVA analysis was performed. The results showed that the temperature and pressure have a significant effect on CO2 solubility and a correlation was successfully developed. The FTIR, NMR characterization and Henry's constant along with other thermodynamic properties such as enthalpy and entropy of absorption were calculated. The physicochemical properties such as density, refractive index, and viscosity were also measured and correlated using a modified Graber and Vogel-Tamman-Fulcher (VTF) equations respectively.
AB - In this work, ammonium-based Deep Eutectic Solvents (DES) were successfully synthesized using Ethanol amine hydrochloride, and tetraethylenepenta amine (EAHC-TEPA) as a hydrogen bond donor (HBD) with the molar ratios of 1:1, 1:3, 1:6, and 1:9. Carbon dioxide (CO2) solubility was measured in the synthesized DESs above ratios at different pressures and temperatures. The molar ratio of 1:9 showed the best solubility for CO2 among other ratios and was chosen for more in-depth investigation in this work. Solubility data was correlated using response surface methodology (RSM) and ANOVA analysis was performed. The results showed that the temperature and pressure have a significant effect on CO2 solubility and a correlation was successfully developed. The FTIR, NMR characterization and Henry's constant along with other thermodynamic properties such as enthalpy and entropy of absorption were calculated. The physicochemical properties such as density, refractive index, and viscosity were also measured and correlated using a modified Graber and Vogel-Tamman-Fulcher (VTF) equations respectively.
KW - Carbon dioxide
KW - Deep eutectic solvents
KW - Henry constants
KW - Ionic liquids
KW - Modeling
KW - Solubility
KW - Vapor-liquid equilibrium
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U2 - 10.1016/j.molliq.2020.115133
DO - 10.1016/j.molliq.2020.115133
M3 - Article
AN - SCOPUS:85098526491
SN - 0167-7322
VL - 325
JO - Journal of Molecular Liquids
JF - Journal of Molecular Liquids
M1 - 115133
ER -