What is the maximum level of hydrocarbons permissible in lean amine so as not to cause foaming in the FCC offgas Amine absorber?
Answers
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13/11/2015
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A:
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Egbert van Hoorn, Hocon B V, Egbertvh@hotmail.com
Hydrocarbons do not directly cause foaming in amine systems.
Sometimes a hydrocarbon stream can be contaminated with surfactants, which cause foaming.
If liquid hydrocarbons would cause foaming, how can a refinery treat significant quantities of LPG?
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06/11/2015
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A:
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NS Murthy, Suez, murthy.ns.ext@suez.com
Ideally foam test on lean amine can tell one whether any liquid HC ingress exists in amine. It is simple test by allowing N2 or air bubbled thru lean amine in a graduated jar for a minute and creating foam. Then check the foam collapse time. If it is less than a few seconds, there amine is clean and good for use.
Also, check the presence of FeS (thru TSS test) and HC liquid carry over from upstream sponge absorber (including the demister in the KOD) prior to amine absorber.
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