Moderator: jasper
hkooijman wrote:Unfortunately there isn't a manual yet. The pseudo panel needs some kind of a measured ASTM curve, to generate a set of pseudo components in a PCD library. This library with pseudo components then need to be read back into COCO again. Currently, this is not (yet) automated in any sense as it was meant as a stand alone generation of pseudo's for ChemSep, not as something that works in a nice way with COCO. The advantage is that some of the refinery properties are defined. There is a generic tutorial on pseudo components by hand on http://chemsep.org/downloads/docs/ChemS ... ticals.pdf but this follows a completely manual way of setting pseudo compounds. Unfortunately, though it is planned to be tackled there is no time to quickly fix this ...
Harry
jasper wrote: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.
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