8 replies to this topic

[abhi_agrawa]

Dear Sween,
Since the component does not exist in the HYSYS database, you will have to create a hypo component. This can be done through the hypothetical manager. While defining the component, be sure that you select it as an inorganic salt.
You will need to enter some physical properties of ammonium sulphate for the same.
Hope this helps,
abhishek

[abhi_agrawa]

Hi!
This is what I usually do:
Go to the Simulation basis manager, from the tabs Components, fluid packages etc select Hypotheticals.
Go to Add
In the dialogue box, change the Component class to whatever is suited for your case. The default is hydrocarbon.
Then add hypo. If in your simulation, the component is always solid, then add solid, else add Hypo.
Give the required poperties.
Then hope for the best. Do not be surprised if you get strange results, because the predictions can never be better than the assumptions the software makes and I am not sure what assumptions it makes.

If ammonium sulphate is present in a solution, you may try defining the ions (ammonium and sulphate ions) and then may be use the electro-NRTL property method.

I hope that this would have cleared some of your doubts.

abhishek

PS: I personally prefer ASPEN when it comes to user defined components/electrolytes or solids.

[abhi_agrawa]

Sween,
When you go to the add component view, then in the component sub-group, you will see Traditional and Electrolyte. Select electrolyte and you will see a list of electrolytes already defined in HYSYS. From these you can pick those you require. I have not seen the list, but I guess that it will have Ammonium as well as sulphate ion.

Hope this will help.

abhishek

[process equipment]

Hi,

I'm also working with Ammonium Sulphate for vapor crystilizers..

Anyone can help me with more information about this ?

[abhi_agrawa]

In your case the relevant ions should be : NH4+, H+, SO4-- and HSO4-

-abhishek