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In template Hydrocracker, Aspen Hysys Refining (formerly RefSYS), what must I modify because that template does not accept the naphtha feed? It always says error "One or more feeds not solved". If I put 0.3% wt for a heavy component, Hysys will adjust it to 48% and change the feed character. How can I fix that error?
 
Answers
05/12/2012 A: Anton Alvarez Majmutov, CanmetENERGY , Anton.Alvarez-Majmutov@NRCan-RNCan.gc.ca
The Aspen Hysys Hydrocracker module was designed only for gasoils in general, that is light gasoil, vacuum gasoil and light cycle oils. It does not work for naphtha or heavy residues. The module adjusts the composition of the "kinetic lumps" using the bulk porperties of the feed. In your case, the naphtha feed is so light that the model is not capable of matching the composition of the lumps to the bulk properties of naphtha, hence the error. Your should try programming on a Hysys spreadsheet your own kinetic model for naphtha hydrotreating. You can find those in the literature.