Butanol and water form a partially miscible system; how to use ASPEN to create the gas-liquid-liquid phase diagram for butanol-water
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This post was last edited by defeil on 2017-6-14 11:31. Butanol and water form a partially miscible system; how can one use ASPEN to create a gas-liquid-liquid phase diagram for the butanol-water system? Figures 1 and 2 in the attachment show the analysis settings and results obtained using ASPEN. The simulation results differ from the actual phase diagram (Figure 3), as the liquid-liquid two-phase region (ML1L2N) is missing. Why is that?
LLE is tough. VLE can meet the needs of analyzing problems.
It’s difficult, but there are still ways to do it. Please advise on the specific methods; thank you!
Similar to the approach used for gas-liquid phase diagrams, liquid-liquid equilibrium data are of great significance for partially miscible systems such as n-butanol-water; chromatographic separation followed by distillation processes plays an important role in this context
What is the azeotrope temperature simulated by the original poster? Is it 92.4°? What is the mass fraction of water in the azeotrope composition?