Because of the outstanding physical and chemical properties of biomass-originated γ-valerolactone (GVL), it has been characterized as a promising alternative platform molecule, which can be utilized as an oxygenate in fuels and green solvents. Herein, the isobaric vapor–liquid equilibrium (VLE) of GVL and toluene, which was selected as a representative of aromatic hydrocarbons, was investigated at p = 101.3 and 50.7 kPa. The experimental data were correlated with Wilson, NRTL, and UNIQUAC activity coefficient models. The temperature-dependent vapor pressure of toluene was additionally determined and correlated with the three-parameter Antoine and Clark–Glew equations. All the applied models were found suitable for representing the VLE data. It was found that the toluene (1)–GVL (2) mixture shows a positive deviation from Raoult’s ideality as well as from the UNIFAC prediction at both pressures.

中文翻译：

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γ-戊内酯+甲苯的二元混合物的等压蒸气-液体平衡

由于生物质来源的γ-戊内酯（GVL）杰出的物理和化学性质，它已被表征为一种有前途的替代平台分子，可以用作燃料和绿色溶剂中的含氧化合物。在此，等压汽-液平衡GVL和甲苯（VLE），将其选定为芳族烃的代表，在研究了p= 101.3和50.7 kPa。实验数据与Wilson，NRTL和UNIQUAC活动系数模型相关。还确定了与温度有关的甲苯蒸气压，并将其与三参数Antoine和Clark-Glew方程相关联。发现所有应用的模型都适合表示VLE数据。研究发现，在两种压力下，甲苯（1）–GVL（2）混合物均与Raoult理想值和UNIFAC预测值存在正偏差。