Question
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At one of our gas processing plants, we are using hybrid amine solution MDEA for acid gas recovery. H2S 3% and CO2 1%. Our filter replacement frequency is very high, observed corrosion, sample analysis reflects, Iron count 14ppm. Other results are high acetates 13000 ppm in amine, PH reducing trend ...HSAS 1.5%. There is no any chemical injected on wellsite. What could be cause of corrosion /filter change out? What could be other source for acetates as production chemicals are not used on wellsite?
Mar-2022
Answers
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Nathan Hatcher, Optimized Gas Treating, Inc., nate.hatcher@ogtrt.com
Oxygen ingress leading to oxidative degradation of the amine is one explanation. If the feed contains cracked gases from a Coker or FCC, then cyanide in the feed can lead to the formation of carboxylic acids by hydrolysis.
Mar-2022
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