6 replies to this topic

[prince47]

Dear Gentlemen

In attach please find foaming tendency of amine gas treating solution procedure. I appreciate to everybody to review this procedure if it is right on or not.

Thanks

Attached Files

•  Foaming Tendency of Amine Gas Treating Solutions.pdf   91.81KB   289 downloads

[Zauberberg]

The procedure seems to be quite in place although different vendors (e.g. BASF, Huntsman, SNEA/Total etc.) may have different guidelines/test methods for determining Foaming parameters.

The simplest one I have seen was to mix equal quantities of amine and demineralized water, shake the sample by hands (without specifying shaking frequency and amplitude) and then measure the foam volume and the foam breaking time. Surprisingly, but it doesn't appear that bad as it may sound.

Another (similar) type of testing is attached below.

Attached Files

•  Foam Test.JPG   64.97KB   95 downloads

[prince47]

The procedure seems to be quite in place although different vendors (e.g. BASF, Huntsman, SNEA/Total etc.) may have different guidelines/test methods for determining Foaming parameters.

The simplest one I have seen was to mix equal quantities of amine and demineralized water, shake the sample by hands (without specifying shaking frequency and amplitude) and then measure the foam volume and the foam breaking time. Surprisingly, but it doesn't appear that bad as it may sound.

Another (similar) type of testing is attached below.

Thank dear for your support

Toady morning I did lab experiment to measure foaming tendency and break time by using the attached procedure for the following :

• Fresh DGA amine solution
• 50% DGA + 50% water solution
• DGA solution from my system
• 50 % DGA solution with small quantity of hydrocarbon
• 50 % DGA solution with high quantity of hydrocarbon

The result of each one is as follows:

50 ml sample @ air flow rate of 500 ml/m

Sample Source Break Time (second) Foam Height (ml)
Fresh DGA <1 52
50 % DGA/water <1 52
50 % DGA/water from system 1 55
50 % DGA solution with small quantity of hydrocarbon 1 55
50 % DGA solution with high quantity of hydrocarbon 1 55

The show me the hydrocarbon isn’t a factor of foaming. Am I correct?

Thanks

[Zauberberg]

What are the "small quantities" of Hydrocarbon? How much is that? Also, where does the fresh DGA sample come from? Process? Storage? ISO container?

Having 1 second foam breaking time means no foaming at all. Get a sample of amine from process, and repeat the procedure with increased gas flow or simply perform shaking by hand. If everything is done well, even the fresh amine from ISO container should show some signs of foaming.

I wonder about the foaming breaking time of ur sample. It is really short only 1 second. Coz i've performed my foaming stability test by collecting sample from my process. It took more than 20 seconds to back to the original level and the foam height is >150 mm.

Maybe i need to re-test my sample again.

[Wajid]

ASTM d-892 covers the foaming tendency test with controlled gas flow rate, while ASTM d-3601 covers simple bottle shake test for foaming tendency of liquids.

For anti-foaming, there are so many methods to reduce flooding of column, but not consider the structure change of column internals, I had tried it, and gain the big advance,I am sure it is an foundamental solution,