4 replies to this topic

[bernath]

Dear my fellow engineers,

I have performed a simulation for Gas Sweetening Unit (GSU) for certain project by using Aspen Hysys. There's this problem associated with the operating range of Hysys amine package which is developed by DB Robinson. Unfortunately, in this amine package, the amine stripper reboiler temperature can't exceed 257 deg F (125 deg C). This is a breaking heart limitation for me, but somehow I manage to complete the simulation.

Now that the next project coming ahead, for above reason, I prefer not to use Hysys again when it comes to sweetening simulation. I wanna try using PROII to perform this sweetening simulation since the company I work for has the on-going license for PROII.

Well, I wanna know whether PROII is better than Hysys when it comes to sweetening simulation. I know that Promax is better that those two, but I don't have that kind of privilege right now and still have to stick with either PROII or HYSYS. If there's any of you, my fellow engineers, who is ever to use both of them in simulating sweetening process, please kindly share your experience here.

thank you very much

best regards,
bernath

[Padmakar Katre]

Dear my fellow engineers,

I have performed a simulation for Gas Sweetening Unit (GSU) for certain project by using Aspen Hysys. There's this problem associated with the operating range of Hysys amine package which is developed by DB Robinson. Unfortunately, in this amine package, the amine stripper reboiler temperature can't exceed 257 deg F (125 deg C). This is a breaking heart limitation for me, but somehow I manage to complete the simulation.

Now that the next project coming ahead, for above reason, I prefer not to use Hysys again when it comes to sweetening simulation. I wanna try using PROII to perform this sweetening simulation since the company I work for has the on-going license for PROII.

Well, I wanna know whether PROII is better than Hysys when it comes to sweetening simulation. I know that Promax is better that those two, but I don't have that kind of privilege right now and still have to stick with either PROII or HYSYS. If there's any of you, my fellow engineers, who is ever to use both of them in simulating sweetening process, please kindly share your experience here.

thank you very much

best regards,
bernath

Hi,
As you mentioned earlier, both these two simulators don't have cabailities in case of treating acid gases with tertiary amine or the physical solvent. The available options are whose reliability is better than Pro-II and Hysys are ProMax (www.bre.com) and ProTreat (www.ogtrt.com). Recenntly I came across RateSep options in Aspen Plus but don't have any experience so far. Pro-treat I used and find it useful with certain limitations.
If you give us the background of the system with some brief descripton like inlet acid gas composition, temperature, pressure, solvent used, sweet gas specifications to be mantained. Based on this info we can suggest specifc to Pro-II and Hysys modeling the case and further the tuning of the model. Waiting for your comments.

[hshethna]

If there is a choice between PROII and HYSYS, I would still go for HYSYS for gas sweetening. In HYSYS, there is an old Amines package and a new Amines package. You should be using the new Amines package. It is under ComThermo and works well. Especially in V7.2.

I agree that BRE and PROTREAT have been known to be more preferable.

There seem to be Ratesep options in HYSYS in V7.3 which is also known to be good.

[bernath]

Sorry for late reply, just came back from the site.

Please find the attached gas composition and its operating parameter.

The solvent should be tertiary amine based such as MDEA.

The cleaned gas should only contain 50 ppmv of CO2 and 1ppmv of H2S.

thank you

regards

Attached Files

•  well head comp - 4cases.xls   27KB   57 downloads

[bernath]

If there is a choice between PROII and HYSYS, I would still go for HYSYS for gas sweetening. In HYSYS, there is an old Amines package and a new Amines package. You should be using the new Amines package. It is under ComThermo and works well. Especially in V7.2.

I agree that BRE and PROTREAT have been known to be more preferable.

There seem to be Ratesep options in HYSYS in V7.3 which is also known to be good.

Dear hshethna,

I have experienced in simulation amine package by using Aspen HYSYS 7.1 and wasn't aware of the existence of the "old" and "new" amine package. As explained in my 1st post in this thread, there's many limitation of operating parameter with this package, one of which I encountered was the operating temperature. It gave warning at temperature above 125 deg C. It seems that the new version have been improving so much.

Thank you for this new info. I will soon propose the company I work for to update the current version.

Moreover, what is Ratesep option? Never heard it before. Could you give me brief explanation about this one?

thank you
regards,
bernath