1 reply to this topic

[cwk87]

In the MMA production, I'm using UNIQUAC simulation packeage.
I add in hexane to break azeotrope of MMA and separate out MMA by DC.
after that, the remaining component left
1) Hexane
2) Methanol
3) Water

Why UNIQUAC couldn't give the same result as Peng Robinson gave in separating these 3 remaining components using DC?

[milenkom]

In the MMA production, I'm using UNIQUAC simulation packeage.
I add in hexane to break azeotrope of MMA and separate out MMA by DC.
after that, the remaining component left
1) Hexane
2) Methanol
3) Water

Why UNIQUAC couldn't give the same result as Peng Robinson gave in separating these 3 remaining components using DC?

Becuase UNIQUAC isn't predictive package. Binary interaction paramaters for UNIQAUC package were obtained by regression from experimental data for binary mixtures.

Edited by milenkom, 19 February 2010 - 02:22 PM.