Heterogeneous catalytic gas–liquid reactions are intensified when carried out in the homogeneous fluid phase by means of a supercritical cosolvent. For instance, supercritical propane is used to enhance the yield in hydrogenation of vegetable oils. Besides phase equilibrium knowledge, volumetric information is also needed to elucidate kinetic mechanisms and design continuous supercritical reactors. In this work, we report new experimental PvT data on the reactive mixture H₂ + sunflower oil + propane using the isochoric method. In addition, the phase equilibria and PvT data are modeled with the GCA and RK–PR equations of state, respectively. The isochoric method provides not only PvT information under the reaction conditions but also the reactive system compressibility, which is a key variable to attain enhanced transport properties in supercritical reactors.

中文翻译：

---

氢，丙烷和植物油混合物的密度和相平衡：实验数据和热力学模型

当在均相流体相中通过超临界助溶剂进行时，异相催化气液反应会加剧。例如，超临界丙烷用于提高植物油氢化的产率。除了相平衡知识外，还需要体积信息来阐明动力学机理和设计连续超临界反应堆。在这项工作中，我们报告了使用等渗法对反应性混合物H ₂ +葵花籽油+丙烷的新实验PvT数据。此外，分别利用GCA和RK-PR状态方程对相位平衡和PvT数据进行建模。等容方法不仅提供的PVT 反应条件下的反应信息，以及反应体系的可压缩性，这是在超临界反应器中获得增强的输运性能的关键变量。