The selection problem in thermodynamics
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Furfural, methylfuran, **furfural – which thermodynamics should be used for this system? It’s not available in the methylfuran proii component library; what substance should I choose as a substitute? Can ProII simulate a distillation column in which the bottom of the tower is used for batch distillation? This post was last edited by suiran983527 on 2009-3-25 14:27.]
Proii should allow for the customization of components, right? Why use other substances as substitutes?
Custom components, try using the unifac method
When distilling these substances together, if there is no special requirement, it’s sufficient to use a substitute with a similar boiling point; there’s no need to create something special for that purpose.
For binary gas-liquid equilibrium data, a thermodynamic consistency check can be performed using the following method. By plotting log(γ2/γ1) versus x, the resulting curve will show two regions: one corresponding to the horizontal axis value log(γ2/γ1)=0, and another corresponding to the areas S1 and S2. If ABS(S1-S2)/(S1 + S2) ≤ 0.02, then it can be considered that the thermodynamic consistency criterion is satisfied.
It is entirely possible to choose a substitute with a similar boiling point and a structure that is close to it; batch distillation can also be used.
I would like to ask how to create the diagram you mentioned. Could you provide a screenshot for reference? I’d like to take a closer look~~~~ I think this method is a fairly good way to determine the thermodynamic choice. . . .
In this example, the density of the substance I obtained using the group contribution method is 956 kg/m3, its boiling point is 60.8 degrees, and its molecular weight is 82. The original substance, methyl furan, has a density of 916 kg/m3, a boiling point of 63.8 degrees, and a certain molecular weight. Can this substance be used as a substitute? This post was last edited by suiran983527 on 2009-3-27 08:55.]