상태방정식을 이용한 디클로로메탄/이산화탄소 혼합 용매의 열역학적 거동 연구

초록

Single- or multi-component supercritical fluids, which exhibit excellent solubilityin polymers, are used as solvents in polymer-based industries. Because their propertieschange easily with volume, temperature, and pressure, the use of single- or multi-componentsupercritical fluids in industrial applications requires the supercritical fluid apparatusto be designed according to the required volume, temperature, and pressure. Supercriticalfluid apparatus design and optimization can benefit greatly from the analysis and understandingof the thermodynamic behavior of single- or multi-component fluids. Therefore,this study investigated the correlation between the composition ratio of a dichloromethane/carbon dioxide mixture and pressure at 200 oC using ideal gas, van der Waals, Redlich-Kwong, Soave-Redlich-Kwong, and Peng-Robinson equations of state. The critical temperatureaccording to the compositional change of the dichloromethane/carbon dioxide mixturewas predicted by the basic mixing rule. This analysis of the thermodynamic behaviorof the dichloromethane/carbon dioxide mixture can be used for optimizing supercriticalfluid apparatuses.

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