氯化胆碱乙二醇型低共熔溶剂中CO_2的溶解度测定和关联

Measurement and Correlation of Solubility of CO_2 in Deep Eutectic Solvent Based on Choline Chloride and Ethylene Glycol

在温度为313．15-33315K和压力为0．1～14MPa条件下，采用静态平衡法测定了CO2在摩尔分率固定为1：2氯化胆碱乙二醇型（ChCl-EG）低共熔溶剂（DEs）中的溶解度。同一温度下，DES中CO2的溶解度随着压力的增加而增加。以压力为变量，采用亨利定律和多项式回归方程对溶解度实验数据进行了关联，基于多项式回归方程而得到的溶解度方程与实验值具有很好的相关性，可用于中低压范匿内的氯化胆碱乙二醇型低共熔溶剂中CO2溶解度的计算。

The solubility of Carbon dioxide （CO2） in a deep eutectic solvent based choline chloride and ethylene glycol was determined at 313.15 K, 323.15 K and 333.15 K under pressures up to 14 MPa by using a static equilibrium method. The mole ratios of choline chloride and ethylene glycol selected was 1 ： 2. The results showed that the solubility of CO2 in DES increases with the pressure increasing. The experimental data was also correlated with Henry＇s law equation and polynomial regression equation by using the pressure as the independent variables. The results showed that the solubility equations based on polynomial regression mode and the experimental values could correlate with each other well, which could be used to calculate the solubility of CO2 in ChCI-EG DES under the condition of middle- low pressure.