5 replies to this topic

[Faizal Mohd]

Good day Everyone,

I am currently modelling out an Amine treatment unit (30% MEA) in hysys as part of an NGCC power plant. Currently I am facing a few setbacks in terms of literature information particularly at the regenerator side and would greatly appreciate if anyone can supply me with the following information:

Typical Regenerator distillate pressure & temperature
Typical regenerator bottom pressure and temperature

Some relevent information
Inlet Regenerator Temperature: 93.3 deg C
Inlet Regenerator Pressure : 674 kpa

Warmest Regards,
Faizal

[ColinR33]

Faizal, most amine strippers operate around 10-12 psig at the reboiler with a reboiling temperature around 245-255 deg F. Condenser is typically run around 120 deg F with a reflux ratio around 1.5 - 2.0. Hope that helps.

Cheers,
Colin

[Hamid_r_2003]

I don't have much experiences in amine plant modeling however i believe that you should check the degradation temperature of your amine solution, then you can consider a margin for setting your boiling point (e.g 15-20°C) and estimate the corresponding pressure.

[Ceng]

Refer to Gas Purification book of Kohl for detail data

[RockDock]

There is no ordinary bottoms temperature of an amine regeneration unit. The temperature depends mainly on the pressure. You want as low of a pressure as you can get. 10-12 psig is pretty typical in the bottom, with a 2-4 psi pressure drop through the column.

120 F in the condenser is good, too.

As an additional note, 30wt.% MEA is on the high side.

[Art Montemayor]

Faizal:

 

If you don't understand the Amine acid gas removal process, you are wasting your time trying to simulate it.  Garbage in will only produce Garbage out.

 

Go to the Industrial Professional and the Hydrocarbon Forums where you will find a lot of threads where I have  detailed, sketched, and explained in detail a lot of the Amine acid gas removal process.  Additionally you should have access to (or own) the following books:

• "Gas Purification"; Kohl & Neilsen
• "Gas & Liquid Conditioning"; Robert N. Maddox
• "Gas Conditioning & Processing"; John Campbell
• "GPSA Engineering Databook"

If you need specific explanations to how the process works and how it is designed by manual calculations, go to the Students or Professional Forums and start a thread there.  I will be happy to explain what ever you need regarding these processes.