5 replies to this topic

[ekasusanto]

Hi I am simulating acid gas removal using mixed amine (MDEA and DEA). The mixed amine was going into an absorber, however, no amine was found in the outlets. I already used amine package, but nothing happened.

 

Also, do you guys have any recommendation for the operating conditions? Because I have been assuming most of the operating conditions.

 

Thanks a lot

[Erwin APRIANDI]

Hi ekasusanto,

 

Can you gives us the screen shoot of the simulation PFD at least to understand at which point of outlet that you are referring to, I hope this is at outlet liquid from the contactor not on the gas stream outlet.

 

In doing an Amine Sweetening Unit (HYSYS or UNISIM) you required to use amine package EOS, but I believe you are still using Peng Robinson EOS at others places.

 

Amine package, it can not be use for any hypotetical component, therefore you will have to removed any hypotetical component by using a component splitter before changing the EOS of the stream, or if not (HYSYS or UNISIM will removed it for you; if you are using Aspen or UNISIM).

 

For the operating condition of amine sweetening unit, for any absorption operation; the rules of thumb is to make the operating condition at high pressure and low temp how high and how low temperature it depend on how you can get it in feasible way, for typical value you can refer to http://www.bre.com/s...s-treating.aspx they have even the effect of having different temp, pressure and also number of inlet nozzle to the contactor.

 

Hope it Help.

[gegio1960]

better to use promax.... you're going to have headaches with hysys.

just 2 cents ;-)

Edited by gegio1960, 31 August 2013 - 09:30 AM.

[Erwin APRIANDI]

better to use promax.... you're going to have headaches with hysys.

just 2 cents ;-)

 

Yup it is true, but only if you are designing the Amine regeneration package, if not and only for input to package licensor (vendor), AspenOne and Unisim I think it is enough.

[Zubair Exclaim]

ekasusanto check following

 

1-Dont use hypotheticals

2-Amine pacakge only supports a few components like C1 to C12 CO2 , H2S, COS , CS2 etc look it up in maual. Any component outside this range will give you crazy behaviour.

3-Confirm you are using a proper property package such as Amine or DBR amine

4-Confirm you dont have any stream cutters inside flow sheet or out side on feed stream

5-Also chek if you are using the right temperature/ wt% amine etc limits.... find it in manual ... check if your operating conditions are not miles away from normal operating parameters  

 

However i would suggest you use DBR amine package .. its newer and more advanced package...  although its not related with your problem.

[ebi4exploit]

Please kindly follow the steps outlined by Zubair Exclaim. I guess it will suffice for the problem you encountered. And if there are any other challenge please let us know.

 

Best Regards.