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一、引言二氧化碳与芳烃的挥发度相比,悬殊较大,因此属于不对称的体系。这类体系的气液平衡数据的推算乃是当前热力学领域中比较感兴趣的,且急待解决的课题。因为这和石油及其相关工业的进展,能源的利用关系密切,特别是用超临界流体去萃取蒸汽压很低的物质时,这种不对称体系的相平衡是十分重要的性质。因此寻找一种行之有效的推算方法,从已有的、不多的实验数据来推算其它温度和压力下的数值,弥补实验受条件限制的不足,乃是热力学相平衡理论研究的主要目的之一。
First, the introduction of carbon dioxide and aromatics volatility compared to great disparity, it is an asymmetric system. The calculation of the gas-liquid equilibrium data of such systems is an issue that is of more interest in the current thermodynamics field and is in urgent need of solution. Because this is closely related to the progress of petroleum and its related industries and the utilization of energy, especially when supercritical fluid is used to extract substances with low vapor pressure, the phase equilibrium of such asymmetric system is of very important character. Therefore, looking for an effective method of calculation, from the existing, small experimental data to calculate the value of other temperatures and pressures to make up for experimental limitations subject to the limitations of the thermodynamic phase equilibrium theory is the main purpose of the study one.