An Investigation of Near-Critical Effects and Adsorption Phenomena in Supercritical Fluid Technology

本研究从理论上和实验上研究了近临界流体中溶质在固定相上的吸附。理论上，统计力学积分方程将用于描述溶质分配的平衡热力学，这将导致偏摩尔焓、体积和最终分配系数的方程。实验上，将使用色谱技术来获取吸附数据。这两条研究路线都将特别关注当溶剂是两种超临界流体在其近临界区域的混合物时溶质的吸附是如何变化的。对于这种情况，提出的研究将研究通过改变溶剂组成，溶质对溶剂的行为可以从吸引调节到排斥的可能性。

This research studies theoretically and experimentally adsorption of solute from near critical fluids onto stationary phases. Theoretically, statistical mechanical integral equations will be used to describe the equilibrium thermodynamics of solute partitioning, and this will lead to equations for partial molar enthalpies, volumes and ultimately partition coefficients. Experimentally, a chromatographic technique will be used to acquire adsorption data. Both lines of research will focus in particular on how the adsorption of solute changes when the solvent is a mixture of two supercritical fluids in their near critical region. For this case, the proposed research will study the possibility that by varying the solvent composition the behavior of the solute towards the solvent can be modulated from attractive to repulsive.