4 replies to this topic

[Ra v]

Dear All,

Can anyone please help me to tell how the absorber loading is to be calculated molCO2/mol MEA and perecent recovey of CO2 absorption process

here i am attaching the parameters.

please tell me if any additional data required.

Regards
A Ravi

Attached Files

•  Absorbe Loading.xlsx   8.66KB   159 downloads

[Art Montemayor]

A Ravi:

 

What is your gas temperature?  Is it 324 ^oC?  I don't believe it.

What are your pressure units?  Be concise and specific.  We can't read your mind.

 

An MEA solution circulated through a CO2 absorber has a maximum gas loading of 0.35 mol CO2/mol MEA usually.  This is NOT CALCULATED as you state.

 

For a complete explanation of the amine processes - especially that for CO2 removal, read the book "Gas Purification" by Kohl & Neilsen. 

[Ra v]

Dear Art

 

Preesure :Kg/cm2 and Temperature : Kelvin

 

and as you said i have seen that absorber loading is around 0.32- 0.35 molco2/mol mea usually

 

But Can you please explain the calcualtion part.

 

Rgs

a ravi

[Art Montemayor]

a ravi:

 

As I have stated so many times before:  Buy or obtain/borrow the book, "Gas Purification" by Kohl and Neilsen and make sure you read, study, re-read, and re-study all that is written there about the Ethanolamines and the Design and Operation of Amine plants.   Although the authors have little or no hands-on experience with these plants, this book is considered the authoritative and recognized text on acid gas removal with ethanolamines.  Some of the material is theoretical and is not explained in detail - such as why 20 plates are used by the engineeering contractor  companies in the absorber and stripper columns - but since the authors lack real-world, hands-on experience, it is to be expected and tolerated.  Nevertheless most of the material is very valuable theory and background.

 

Amine gas loadings are set according to empirical, field experience (Kohl & Neilsen don't admit this) and are set as:

Lean MEA gas loading = 0.1 to 0.15 mols CO₂/ mol MEA (or lower, if you can get it)

Rich MEA gas loading = 0.35 mols CO₂/ mol MEA

 

I know this because I not only have operated these plants in the past, I've also designed and built them.  Trust me.  Why do you continue to refuse to answer my specific questions?  What is the meaning of the reported 324 temperature value?

 

(By the way, what has happened to your MEA operating thread wherein I asked you for further information and details?  Is this thread ended for you?  You have not furnished the information on your little plant that I requested and I suppose you want to remain secretive about it.  As I have advised you in the past, if you don't furnish the necessary and requested information you shouldn't expect any expert or knowledgeable help in the future.  That is not only common sense, it is the fair and honest thing to happen.)

 

 

[Ra v]

Dear Art,

 

Thanks for the reply. i will buy the book and study it.

 

and regarding the MEA operating i will give you the details, as i saw the whole posts yesterday itself.

 

I am sorry for that.

 

rgs

A Ravi