Application potential of N-hexylpyridinium bromide for separation azeotrope: Thermodynamic properties measurements
Application potential of N-hexylpyridinium bromide for separation azeotrope: Thermodynamic properties measurements
复制标题
溴化正己基吡啶在分离共沸物中的应用潜力：热力学性质测量
DOI：
10.1016/j.fluid.2022.113436
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发表时间：
2022-03-13
影响因子：
2.6
通讯作者：
Wang, Bo
中科院分区：
文献类型：
--
作者：
Li, Jing;Wang, Qiang;Wang, Bo
采用反相气相色谱（IGC）技术研究了溴化N-己基吡啶（[Hpy]Br）离子液体（IL）的一系列热力学参数。这些参数包括Flory-Huggins相互作用参数（chi（12））、无限稀释时的活度系数（gamma（infinity）（12））、探针在[Hpy]Br中吸收的摩尔热（焓）（Δ H-1（S））、[Hpy]Br和探针之间无限稀释时的摩尔混合热（Δ H-1（infinity））和Hildebrand溶解度参数（Δ（2））。用chi（12）法测定了[Hpy]Br和溶解性较好的溶剂在353.15K下的等温汽液平衡数据，并用NRTL模型进行了关联。利用y-x '图探讨了[Hpy]Br作为萃取精馏分离苯（1）/乙醇（2）、苯（1）/异丙醇（2）和苯（1）/噻吩（2）共沸物的潜力。结果表明，[Hpy]Br的加入可以打破三个二元体系的共沸性，验证了热力学分析的可靠性。(C)2022 Elsevier B. V.保留所有权利。
A series of thermodynamic parameters of N-hexylpyridinium bromide ([Hpy]Br) ionic liquid (IL) were investigated by inverse gas chromatography (IGC) technique. These parameters included the Flory-Huggins interaction parameters (chi(12)), activity coefficients at infinite dilution (gamma(infinity)(12)), molar heat (enthalpy) of probe absorption in the [Hpy]Br (Delta H-1(S)), molar heat of mixing at infinite dilution between [Hpy]Br and probe (Delta H-1(infinity)), and Hildebrand solubility parameters (delta(2)). The isothermal vapor-liquid equilibrium (VLE) data of [Hpy]Br and solvents with good solubility at 353.15K were determined from chi(12) and correlated with the NRTL model. The potential of [Hpy]Br as an entrainer for separating benzene (1)/ethanol (2), benzene (1)/isopropanol (2), and benzene (1)/thiophene (2) azeotropic mixture by extractive distillation was explored using the y-x' diagram. Results showed that the azeotropy of three binary systems could be broken by adding [Hpy]Br and the reliability of thermodynamic analyses was verified. (C) 2022 Elsevier B.V. All rights reserved.