I have tried to simulate pyrolysis process in both PRO/II and Hysys using a Gibbs reactor. I have tried two kinds of feedstock to simulate the polymer material (PET), as the process is about plastic wastes pyrolysis, in PRO/II I get some amount of carbon in the product stream, which is similar to real case as in real experiments we have also solid residue, however, in Hysys simulation I don't have any carbon in the product stream and it's all converted to gas and tar products. Is that because Hysys is not able to handle solid state compounds in the process simulation or there is something wrong with the Hysys simulation?
Thanks
Hysys can handle solids in several ways, but not in all ways. The ways it can handle solids include:
1. As non-reactive stream components that affect heat and mass transfer but not phase equilibrium. This, for example, describes solids transport as slurries or entrained dust.
2. As an organic liquid using the OLI (organic liquid interface).
3. As an equilibrium component in a Gibbs reactor.
However, solids cannot form or be destroyed in a heat exchanger or other vessel other than a Gibbs reactor (except possibly in the case of the OLI approach - I do not have much experience with that). There is no robust SVLE computation in Hysys outside of a Gibbs reactor.
http://www.google.com/search?ei=0kD8WsLgO5n-9QPaspXoAQ&q=Hysys+handles+processes+involving+solid+compounds&oq=Hysys+handles+processes+involving+solid+compounds&gs_l=psy-ab.3...3143.5589.0.6777.1.1.0.0.0.0.196.196.0j1.1.0....0...1c.1j2.64.psy-ab..0.0.0....0.YXQYrqr08_k
https://www.sciencedirect.com/search?qs=Hysys%20handles%20processes%20involving%20solid%20compounds&show=25&sortBy=relevance&offset=25
Hysys can handle solids in several ways, but not in all ways. The ways it can handle solids include:
1. As non-reactive stream components that affect heat and mass transfer but not phase equilibrium. This, for example, describes solids transport as slurries or entrained dust.
2. As an organic liquid using the OLI (organic liquid interface).
3. As an equilibrium component in a Gibbs reactor.
However, solids cannot form or be destroyed in a heat exchanger or other vessel other than a Gibbs reactor (except possibly in the case of the OLI approach - I do not have much experience with that). There is no robust SVLE computation in Hysys outside of a Gibbs reactor.
Yes! Yet it depends if it is reactive system or not. If it is non reactive you can use the heat exchanger models. If it is reactive you need to separate the heat transfer process from the reactive process (using e.g Gibbs reactor) to achieve the equilibrium composition at that T , P etc.
I recomend you to simulate the process with Aspen Plus. It does works whit solids
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