MDEA concentration
MDEA concentration
(OP)
What is the effect of MDEA concentration on H2S absorption in Amine Absorber. We are using 30% amine solution. If more concentrated solution is used, what are the advantages in absorption and regeneration? Is it true that upto 40% MDEA concentration absorption is nearly constant?





RE: MDEA concentration
Higher solution strength also tends to increase hydrocarbon solubility in your solvent, particularly troublesome BTEX components if they are present in the gas stream you're treating. Its been my experience that higher strength amine solutions have higher foaming tendency and foam stability in the amine regenerator too, particularly with higher molecular weight amines such as MDEA.
There are a lot of technical articles available on amine systems here: http://w
The Laurance Reid CDROMS have a lot of good amine unit information if you have access to them as well..
Do you have enough instrumentation available to know the temperature profile in your absorber? If not, climbing the tower and shooting temps at inspection ports can get the job done too. Knowing the temperature profile and how many "cool" trays you have can be particularly useful for troubleshooting absorbers.
What kind of gas are your treating, is it Claus tail gas, recycle hydrogen, sales gas? The type of system can have a big impact on potential problems and solutions.
RE: MDEA concentration
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RE: MDEA concentration
Additionally the first 5 trays 0f 35 tray absorber are used for water wash with continuous fresh water circulation.