Foaming MDEA problem 1

[Aaronb82]

How is foaming measured in the Lean Amine sample? What is considered too much foaming?

 

[dcasto]

Too much foaming is defined by not being able to make specification on the treated gas. OR, if amine losses exceed the design.

here is 1 link I googled up, I remeber some lab test where you just took a sample of the amine and shook it, then added a drop of oil and shook it again and noted the difference.

http://www.d-foam.com/files/Unit_Foaming_Potential_and_Training.pdf

 

[Dendrobium1975]

Dear Aaronb82,

You could see in the appendix of this following reference from Pall for the method:

http://www.pall.com/pdf/GDS120.pdf

Once I was informed by an MDEA manufacturer that they use these following numbers to interpret the result of such analysis and determine the severity of foaming:

Rating Foam Volume Break Time

Nil < 10 ml < 5 sec

Slight 11-60 ml 6 – 20 sec

Moderate 61-125 ml 21 – 30 sec

Severe > 125 ml > 30 sec

Hope this help

 

[Aaronb82]

What would cause the Recyle H2 gas leaving the Scrubber to be 150 degrees? The lean amine is 130 degrees and the gas going into the Scrubber is 95 degrees.

 

[SeanB]

The amine reacts with the H2S to produce a water soluble salt. This reaction is exothermic, hence the higher outlet temperature.