Solubilities of carbon dioxide in the eutectic mixture of levulinic acid (or furfuryl alcohol) and choline chloride

The solubilities of carbon dioxide (CO2) in the renewable deep eutectic solvents (DESs) containing levulinic acid (or furfuryl alcohol) and choline chloride were determined at temperatures (303.15, 313.15, 323.15, and 333.15) K and pressures up to 600.0 kPa using an isochoric saturation method. The mole ratios of levulinic acid (or furfuryl alcohol) to choline chloride were fixed at 3:1, 4:1 and 5:1. Standard Gibbs free energy, dissolution enthalpy and dissolution entropy were calculated from Henry's law constant of CO2 in the DESs. Results indicated that levulinic acid based DESs are more effective to capture CO2 than furfuryl alcohol based ones. The solubility of CO2 in the DESs increased with increasing mole ratio of levulinic acid (or furfuryl alcohol) to choline chloride as well as pressure and decreased with increasing temperature. (C) 2015 Elsevier Ltd. All rights reserved.

采用等容饱和法，在温度（303.15、313.15、323.15和333.15）K以及压力最高达600.0 kPa的条件下，测定了二氧化碳（CO₂）在含有乙酰丙酸（或糠醇）和氯化胆碱的可再生低共熔溶剂（DESs）中的溶解度。乙酰丙酸（或糠醇）与氯化胆碱的摩尔比固定为3∶1、4∶1和5∶1。根据CO₂在DESs中的亨利定律常数计算了标准吉布斯自由能、溶解焓和溶解熵。结果表明，基于乙酰丙酸的DESs比基于糠醇的DESs对CO₂的捕获更有效。CO₂在DESs中的溶解度随着乙酰丙酸（或糠醇）与氯化胆碱摩尔比以及压力的增加而增加，随着温度的升高而降低。© 2015爱思唯尔有限公司。保留所有权利。