Hello all, I am trying to simulate a terephthalic acid (TA) plant and I am learning to use the crystallizer unit.
I have a couple questions concerning the crystallizer (feel free to answer any of them please).
The stream inlet for the unit is the product stream of a PBR at high pressure (73bar) and temperature (around 285C). In patents I have found it specifies that the first crystallizer (the unit I am trying to model) should operate at 237 C and 31bar.
My first question when modeling is the following: I try to use the chemistry tab to calculate solubility and I get the following warning:
Similarly, I have found a correlation of solubility for TA in literature and I get a similar error when using that. Does any one know if this is important or not as it is just a warning.
Moreover, In the crystallizer unit I would like it to calculate the PSD using growth kinetics. However, it only gives me the option to use overall nucleation rate and not growth rate that I have found in literature.
Additionally, it mentionions a error about the PBR being a specified temperature sometimes.
Finally, when playing around with the unit and specifying a random PSD I can get a convergence how ever there is no mass flow through the vapor stream which doesnt make sense.
I cannot attach the doc as the files are saved on a virtual machine, but I would really appreciate some help as I have been going in circles for two days.
Regards