3 replies to this topic

[kpavan]

Dear all,

Need help for simulating Butadiene extractive distillation plant.

Currently, I am working on Extraction of 1,3-Butadiene from C4 cut (other components varies from C3's to C5's) extractive distillation by using a solvent consists of Acetonitrile, Ethanol, Water, NaNO2, P-TERT-BUTYLCATECHOL (TBC).
Here NaNO2 is acting as inhibitor and TBC is for prevention of popcorn reaction and composition of NaNO2, TBC in Solvent is as low as 400ppmw. As I am totally new to this process, Can anyone tell me is it needed to take these components (NaNO2, TBC) while doing simulation in Aspen Plus?
Fluid property package is changing from NRTL to ELECNRTL because of these components.

I would like to know if anyone has worked on this.

Any help is appreciable.

Regards,
Pavan.

[riven]

I would suggest that Aspen will not be able to simulate these quantities or compounds. It is better to lump these compounds to their appropriate key components (either heavy or light). You can still take care of them in the mass balance.

That is unless you are specifically looking at simulating the reactions that these compounds prevent in which case I cannot help you.

[Padmakar Katre]

Dear,
Fisrt let me know which simulator you are using if hysys then use Wilson FP (activity coefficient model) provided you don't have VLLE and just have VLE.

[kpavan]

Thanks for your reply.

Padmakar,
I am using Aspen Plus as simulator for doing this.
And as the system is extractive distillation which consists of solvent and hydrocarbons, so I think this should be VLLE. Please correct me if I am wrong.

Please let me know if any other data is required.

Any help is appreciable.

Regards,
Pavan