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Amine Sweetening Model With Promax


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#1 CS10

CS10

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Posted 12 February 2017 - 09:44 PM

Dear Friends,

 

I am currently doing a simulation on Amine Sweetening Model with ProMax model. I just started using this program last month.

 

I am still struggling to find some good ideas to match the model with what the data I have (especially with the absorber column). The model is actually running well, but on my absorber column still not really match with what I require. I want to match the absorber mid bed temperature at 60 deg C.

 

The current mid bed temperature is around 46 deg C which is far from what I expect. Please see the temperature profile for the simulation I did.

 

Input data:

 

Absorber:

Tin = 35 deg C

Pin = 53 barg

Qin = 530000 kg/hr

Ptop = 52 barg

Pbottom = 53 barg

Internall = 2 beds with 8 m height/bed

ID = 4600 mm

MDEA in = 1000 kg/hr

 

Could you please give some clues to get the model fixed? Thanks.

 

regards,

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#2 gegio1960

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Posted 12 February 2017 - 11:55 PM

did you miss anything?

are you treating H2S, CO2 or both?

what about the concentrations?

is the process fluid in gas or liquid phase?



#3 CS10

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Posted 13 February 2017 - 12:21 AM

Hi geogio 1960,

 

I want to remove the CO2 to around 50 ppm.

 

the Composition of the feed (major components) in mole fraction:

Methane = 88.01

CO2 = 6.01

Ethane 3.83

H2O = 0.13

 

Amine composition (mass fraction):

H2O = 50

MDEA = 45

Piperazine = 5



#4 CS10

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Posted 14 February 2017 - 02:22 AM

Dear friends,

 

Any thoughts on my case.

 

your inputs and comments would be valuable for me.

 

 

regards,



#5 RockDock

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Posted 15 February 2017 - 09:10 AM

I would send the model to Promax's technical support. They would be able to help you quicker than us. I normally get feedback from them in a couple hours after sending in a case. If for some reason you don't want to do that, you need to make sure you have all the correct inputs. Look at your amine circulation rate and the column type closely.






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