Phase Equilibrium Characteristics of CO2 and Ionic Liquids with [FAP]– Anion Used for Absorption-Compression Refrigeration Working Pairs
Phase Equilibrium Characteristics of CO2 and Ionic Liquids with [FAP]– Anion Used for Absorption-Compression Refrigeration Working Pairs
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用于吸收压缩制冷工质对的 CO2 和带[FAP]阴离子的离子液体的相平衡特性
DOI：
10.1007/s11630-020-1407-y
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发表时间：
--
影响因子：
2.5
通讯作者：
Dou Binlin
中科院分区：
文献类型：
--
作者：
Wu Weidong;Wang Li;Li Xiang;Liu Hui;Zhang Hua;Dou Binlin
CO2-离子液体作为新型吸收-压缩式制冷工质对，其相平衡特性的研究具有重要意义。三种IL，即，选择[emim][FAP]、[bmim][FAP]和[hmim][FAP]作为潜在的吸收剂。在293.15 K ~ 333.15 K温度范围内，实验测量了0 ~ 5.0 MPa范围内CO2在这些离子液体中的溶解度，并讨论和分析了温度、压力、离子液体阴阳离子结构以及搅拌作用对CO2溶解度的影响。结果表明，同一IL家族中较长的烷基链、IL阴离子中的烷基氟基团以及磁力搅拌器的搅拌作用对CO2的溶解度有积极的影响。在3种离子液体中，[hmim][FAP]对CO2的吸收性能最好，在5 MPa和293.15 K下，CO2的溶解度达到0.7641，为本实验中测得的最大溶解度。推荐CO2-[hmim][FAP]二元混合物作为CO2吸收-压缩制冷系统的潜在适用工质对。
The study of the phase equilibrium characteristics of CO2-ionic liquids (ILs) as new absorption-compression type refrigeration working pairs is of great importance. Three kinds of ILs, i.e., [emim][FAP], [bmim][FAP] and [hmim][FAP], were chosen as potential absorbents. The solubility of CO2in these ILs was measured experimentally within 0 to 5.0 MPa at temperatures of 293.15 K to 333.15 K, and the effects of temperature, pressure, IL anion and cation structure and stirring action on CO2solubility were also discussed and analyzed. The results showed that the longer alkyl chains in an identical IL family, the alkyl fluoride group in IL anions and the stirring action by a magnetic stirrer had positive effects on the solubility of CO2. In the three ILs, [hmim][FAP] possessed the best performance for CO2absorption; the solubility of CO2reached 0.7641 at a pressure of 5 MPa and temperature of 293.15 K, the maximum solubility measured in this work. The CO2-[hmim][FAP] binary mixture is recommended as a potentially applicable working pair for CO2absorption-compression refrigeration systems.