Thermodynamics of green process mixtures

拟议的研究将包括流体混合物热力学性质的理论和实验研究。理论研究将集中于状态方程的修正，以便将其应用扩展到涉及相行为和热性质不能由现有模型准确表示的伴生物质的系统。实验工作将包括研究工业上重要混合物的相行为，以及测量含有一种或多种相关化合物作为组成成分的选定混合物的过量焓。超临界流体技术经常用于所谓的绿色过程，包括分离过程、化学和生化反应过程、复杂物质的再结晶和材料处理、微生物和酶的失活、微生物细胞的破坏和纤维素材料的爆炸以及其他化学工程过程。超临界流体技术的主要优点是减少工业废物，提高工艺效率，节约能源。二氧化碳由于其特殊的化学和物理特性，在超临界流体技术的应用中被广泛用作首选流体。在这方面，拟议的研究将调查涉及超临界二氧化碳作为成分的选定绿色工艺混合物的相行为。总之，提出的研究的主要目标是开发新的信息，这不仅将扩大我们对工业重要系统的热力学性质的认识，而且还可以用来提高基于状态方程的模型在工程应用中的能力。

The proposed research will consist of both theoretical and experimental studies of the thermodynamic properties of fluid mixtures.  The theoretical study will focus on the modification of an equation of state with a view to extending its application to systems involving associating species whose phase behaviour and thermal properties cannot be accurately represented by the existing models.  The experimental work will consist of the study of the phase behaviour of industrially important mixtures and the measurement of excess enthalpies of selected mixtures involving one or more associating compounds as the constituent components.  Supercritical fluid technologies are frequently used in the so-called green processes including the separation processes, the chemical and biochemical reaction processes, the re-crystallization and materials processing of complex substances, the inactivation of microorganisms and enzymes, the disruption of microbial cells and explosion of cellulose materials, and other chemical engineering processes.  The main advantages of supercritical fluid technologies are the reduction of industrial wastes, the improvement of process efficiencies, and the saving of energy.  Owing to its special chemical and physical characteristics, carbon dioxide has been widely used as a choice fluid in the application of supercritical fluid technologies.   In this connection, the proposed research will investigate the phase behavior of selected green process mixtures that involve supercritical carbon dioxide as a component.  In summary, the main objectives of the proposed research are to develop new information that will not only broaden our knowledge of the thermodynamic properties of industrially important systems but also can be used to improve the capability of equation-of-state-based models for engineering applications.