Activity Coefficient at Infinite Dilution Study of Molecular Interaction-Selectivity in Separation Processes

Activity Coefficient at Infinite Dilution Study of Molecular Interaction-Selectivity in Separation Processes
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无限稀释时的活度系数分离过程中分子相互作用选择性的研究

DOI:
10.1007/s10765-020-02698-5
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发表时间:
2020-07
影响因子:
2.2
通讯作者:
Wang Qiang
Wang Qiang
中科院分区:
工程技术4区
文献类型:
--
作者:
Li Cailian;Ban Tao;Wang Qiang

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用反相气相色谱法测定了47种有机溶质在氯化1-烯丙基-3-甲基咪唑([AMIM]Cl)离子液体(IL)中的无限稀释活度系数。由无限稀释时的活度系数得到了偏摩尔过量焓、熵、无限稀释时的吉布斯自由能和Hildebrand溶解度参数。根据无限稀释活度系数计算了庚烷/噻吩、庚烷/苯和苯/噻吩分离问题的选择性和容量。[AMIM]Cl的三个分离问题的选择性分别为85.36、30.65和2.79,表明[AMIM]Cl是庚烷/噻吩分离的理想溶剂。
The activity coefficient at infinite dilution for 47 selected organic solutes in 1-allyl-3-methylimidazolium chloride ([AMIM]Cl) ionic liquid (IL) was determined at 303.15 K to 343.15 K through inverse gas chromatography (IGC). The partial molar excess enthalpy, entropy, Gibbs free energy at infinite dilution, and Hildebrand solubility parameters were obtained from the values of activity coefficient at infinite dilution. The selectivity and capacity of heptane/thiophene, heptane/benzene and benzene/thiophene separation problems were also calculated based on the activity coefficient at infinite dilution values. The selectivity of three separation problems of [AMIM]Cl was 85.36, 30.65 and 2.79, which indicated that [AMIM]Cl is an ideal solvent for the separation of heptane/thiophene.
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