How is the vapor-liquid equilibrium K calculated?
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How to determine the vapor-liquid equilibrium constant K for water, methanol, dimethyl ether, and carbon dioxide at certain temperature and pressure? This post was last edited by zhangyong6404 on 2009-3-29 21:30
Please write a good title; you can use simulation software for this. Do it manually, using the UNIFAC model. It’s in the chemical engineering handbook
There are two methods: the equation of state method and the activity coefficient method. Both methods rely on the equality of the fugacities of the vapor and liquid phases; in the equation-of-state approach, the fugacity of the liquid phase is expressed using a fugacity coefficient, whereas in the activity-coefficient approach, the fugacity of the liquid phase is expressed using an activity coefficient. For specific details, refer to textbooks on chemical thermodynamics.
ASPEN PLUN works too
The property function in ASPEN can be used to retrieve the physical property data of each substance at a given temperature and pressure. Calculate K again