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Recent content by Lams001

  1. Lams001

    Wilson Activity Coefficient Model - how to go from y --> x ?

    Provided modified Raoult's law is sufficient (i.e. significant liquid-phase non-ideality, but no LLE and reasonable vapour phase ideality), would Lewis-Matherson not be perfectly adequate? Algorithmically, once you have a means of computing relative volatilities stage-by-stage, I see no...
  2. Lams001

    Wilson Activity Coefficient Model - how to go from y --> x ?

    This would be good if I knew stage-by-stage compositions, but that is what I want to do a hand calculation to determine. All I know is the specified feed, bottoms and distillate fractions and flows. HYSYS has calculated these composition profiles, but I want to confirm them stage-by-stage...
  3. Lams001

    Wilson Activity Coefficient Model - how to go from y --> x ?

    Thanks to both of you for the responses. So my unpleasant conclusion is confirmed - the only way to do this using Wilson is to either write a solver in MATLAB or C+ and crunch my ternary system through an optimisation algorithm, or to build a (very large) database of VLE data. Since I have a...
  4. Lams001

    Wilson Activity Coefficient Model - how to go from y --> x ?

    Hi all, I've been trying to figure out how to "invert" the Wilson model to get liquid fractions from supplied vapour fractions, and I'm confusing myself thoroughly in the process. HYSYS is spitting out a result that I'm not happy with so I want to check the composition profiles with a...

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