Excel library for process calc's including distillation

[carlo.stenali]

Prode Properties does include the Peneloux correction (on liquid volumes and all derivatives) for both Soave Redlich Kwong and Peng Robinson equations of state,
you can set Peneloux correction from Editor (see the attached file) or by code (see the operating manual for additional informartion).
Hoping this helps.

[cstaff]

thank you,
nice software with many features to model petrochemical plants.

[mrbabu]

When simulating the gas plant our client adds a so called "gas saturation unit" which is available as extension in HYSYS, as far as I understand it gives the possibility to saturate the gas with water, our practice with Prode Properties is to add water, do a isothermal flash and then get the vapor phase as saturated, results are very close to those calculated with the "gas saturation unit".
I would appreciate comments about this practice.

[dbert]

the procedure is correct if you manage to keep the amount of condensate very low (by reducing the amount of water injected), with usual EOS condesnate will not be pure water but it will contain a certain amount of dissolved gas and that will modify the final composition in gas phase.
Altough it is a common practice to include a gas saturation unit you should investigate the validity of the selected EOS with water...
In Prode Properties depending from composition and operating conditions you can select ISO 18453 (Gerg 2004), GERG 2008 or a std. EOS with complex mixing rules.

[imranmlis]

Good Source

[carlo.stenali]

mrbabu,
as you correctly noticed the "gas saturation unit" in HYSYS finds the maximum amount of water in vapor phase at specified conditions, you can easily solve that with a isothermal flash.
I do not know why they don't suggest this solution, I can only suppose that users prefer to have a specific icon for that operation.

[Himanshu Parikh]

Dear Sir,

can anybody help me how to download excel library for process calculations. my email id is himanshu_parikh@yahoo.com

[carlo.stenali]

>Dear Sir,
>can anybody help me how to download excel library for process calculations. my email id is himanshu_parikh@yahoo.com

hello himanshu,
I have verified and the download seems to work fine (at least in my case),
in case of problems you can contact by email the developer, email address is available at

[link Point to another website Only the registered members can access]
and ask to receive a copy of the software by email,
size of ppp..exe installation file is about 7 Mb
Hoping this helps.

[bmat]

I am evaluating the solid solution model available in multiphase flash operation of Prode Properties,
I wish to investigate possible applications for wax precipitation.
I have a few questions,
specifically how the software estimates heat of fusion and liquid and solid heat capacities,
could you help ?

[carlo.stenali]

bmat,
the simplified solid solution model in Prode Properties does calculate solid fugacity in multiphase equilibria starting from liquid fugacity and correcting with heat of fusion, liquid and solid heat capacities.
These values are available in Prode Properties databank which includes data for about 1500 chemicals.
Some authors as Firoozabadi, Pedersen and others have tested the ability of the model to predict solid solutions in petroleum fractions / hydrocarbons etc. as for example wax precipitation , in those cases simplified correlations for dHf,cpl,cps can be applied.
I have not direct experience in this area but you can obtain tecnical support from developer.

[carlo.stenali]

I have some additional information about the solid solution model in Prode Properties,
since the solid fugacity is calculated from (subcooled) liquid fugacity results depend from selected model for liquid fugacity and BIPs (Kij) , the user can select different models and tune experikental SLE data.
Prode Properties includes a data regeression procedure able to fit

vapor-liquid equilibrium points
liquid-liquid equilibrium points
solid-liquid equilibrium points

the proper tuning of the model is important (as in VLE and LLE) to obtain reliable results.
From a short review of literature it appears that solid solution models similar to that included in Prode Properties have been applied in many different SLE with EOS as SRK, PR, PC-SAFT etc.

[bmat]

carlo.stenali,
your information about solid solution model in Prode Properties have been useful to me,
I use SRK for liquid fugacity and the model woks well with hydrocarbons, tuning is required in most cases (where experimenal data points are available) but that is a standard for SLE/SVE,
on the plus side, convergence is very reliable.