by jasper » 18 May 2016, 07:25
TPB data go into a recharacterization scheme, that determines for each of the pseudo compounds with a boiling range how to best adjust the pseudo characterization properties (e.g. in an equation of state, the pseudo critical temperature, pseudo critical pressure and pseudo acentric factor) and composition to fit, typically, the boiling curve and density or volume yield curve, subject to constraints of e.g. continuity, zero slope at the end of the curve, etc. It is my understanding that it is exactly the recharacterization scheme that is not (yet) in place in ChemSep.
Given the density and the boiling point of a given pseudo, the PCD manager can estimate the pseudo critical properties using correlations; it can be done for a range directly in ChemSep itself. However, creating the density and boiling point (and yield) of each pseudo from the TBP curve is the missing step at this point.
Harry - correct me if I am wrong please.