The issue of phase boundary area calculation for radfrac in Aspen

First, to answer the first question, the interphase area is the sum of the area diagrams of each plate. In the rate mode, the area map for each plate is calculated independently, and the final phase boundary area is the sum of all the plate area maps. As for the second question, the binary mass transfer coefficient in the interface profile refers to the mass transfer coefficients between individual components, rather than the overall mass transfer coefficients for the liquid and vapor phases. If one wants to know the overall liquid and gas phase mass transfer coefficients, they can be calculated using the mass transfer homogeneity models in Aspen Plus (such as UNIFAC, ASOG, NRTL, etc.). In this model, the mass transfer coefficients for both the liquid and vapor phases are calculated by taking into account the effects of all components. .

Thank you for your response; it was very helpful. I’d like to ask one more thing: When selecting the mass transfer homogeneity model to calculate the mass transfer coefficient, does this mean performing a physical property analysis in the “Physical Properties” interface?

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