LI Guihua, SHAN Haifang, AI Ning, et al. Absorption of CO2 in a novel ternary deep eutectic solvent[J]. CIESC Journal, 2015, (S1): 25-31. DOI: 10.11949/j.issn.0438-1157.20141835.
LI Guihua, SHAN Haifang, AI Ning, et al. Absorption of CO2 in a novel ternary deep eutectic solvent[J]. CIESC Journal, 2015, (S1): 25-31. DOI: 10.11949/j.issn.0438-1157.20141835.DOI:
A series of novel ternary deep eutectic solvents (TDESs) were synthesized from N
N-dimethyl acetamide (DMA)
choline chloride (CC) and ethylene glycol or glycerol with different mole ratios (nDMA:nCC:nethylene glycol=1:1:3
1:1:4
nDMA:nCC:nglycerol=1:1:3
1:1:4). Solubilities of CO2 in TDESs were determined in the temperature range T=293.15—323.15 K with 10℃ intervals under pressure ranging from 0 to 600.0 kPa using the isochoric saturation method. The solubility of CO2 in the liquids increased linearly with increasing pressure and decreased with increasing temperature. Henry's constants were calculated
while TDES obtained from DMA
CC and ethylene glycol with mole ratio 1:1:3 showing the lowest value of 2.174 MPa·kg·mol-1 at 293.15 K. Thermodynamics of CO2 absorption were also calculated
including enthalpy
entropy
Gibbs free energy. The negative enthalpy demonstrated that the process was exothermic.