Effect of Water on the Density, Viscosity, and CO2 Solubility in Choline Chloride/Urea
By Yujiao Xie, Haifeng Dong, Suojiang Zhang, Xiaohua Lu, Xiaoyan Ji. 2014
195 citations recorded by the source corpus.
To study the effect of water on the properties of choline chloride (ChCl)/urea mixtures (1:2 on a molar basis), the density and viscosity of ChCl/urea (1:2) with water were measured at temperatures from 298.15 K to 333.15 K at atmospheric pressure, the CO2 solubility in ChCl/urea (1:2) with water was determined at 308.2 K, 318.2 K, and 328.2 K and at pressures up to 4.5 MPa. The results show that the addition of water significantly decreases the viscosity of ChCl/urea (1:2), whereas the effects on their density and CO2 solubility are much weaker. The CO2 solubility in ChCl/urea (1:2) with water was represented with the Nonrandom-Two-Liquid Redlich–Kwong (NRTL-RK) model. The excess molar volume and excess molar activation energy were further determined. The CO2 absorption enthalpy was calculated and dominated by the CO2 dissolution enthalpy, and the magnitude of the CO2 dissolution enthalpy decreases with the increase of water content.
Subfields: Biomedical Engineering, Catalysis, Fluid Flow and Transfer Processes
View Paper: https://www.semanticscholar.org/paper/3f12b47386c0ec48ae9aa665284e96239aa7e8e9
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Citations in the corpus
- Role of solvents in CO2 capture processes: The review of selection and design methods (2019, background): “Therefore, the addition of water as a co-solvent ca n decline the viscosity significantly but still can maintain the high CO 2 capacity, making aqueous ChCl/Urea (1:2) a promising CO2 absorption solvent [126].”