Abstract The large availability of glycerol on the market and EU directives in the field of automotive fuels prompt Eni S.p.A to develop a technology for producing biofuels from glycerol. This work focuses on determining isobaric vapor-liquid equilibrium data at different pressures of binary systems constituted by 3-ethoxy-1,2-propanediol, an intermediate product, and some of the other compounds involved in the reactions: water, ethanol, 1,2-propanediol, diethyl ether and glycerol. Moreover, the vapor pressure curve of 3-ethoxy-1,2-propanediol was determined at different temperatures. Finally, different thermodynamic models (UNIFAC, UNIQUAC, NRTL and Wilson), were tested against the experimental data to analyze their possible use when designing separation processes of 3-ethoxy-1,2-propanediol.

中文翻译：

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3-乙氧基-1,2-丙二醇+水/乙醇/乙醚/甘油/1,2-丙二醇在不同压力下的气液平衡

摘要 甘油在市场上的大量供应以及汽车燃料领域的欧盟指令促使 Eni SpA 开发一种从甘油生产生物燃料的技术。这项工作的重点是确定由 3-乙氧基-1,2-丙二醇（一种中间产物）和一些参与反应的其他化合物组成的二元系统在不同压力下的等压汽液平衡数据：水、乙醇、1、 2-丙二醇、乙醚和甘油。此外，在不同温度下测定了 3-乙氧基-1,2-丙二醇的蒸气压曲线。最后，针对实验数据测试了不同的热力学模型（UNIFAC、UNIQUAC、NRTL 和 Wilson），以分析它们在设计 3-乙氧基-1,2-丙二醇分离工艺时的可能用途。