Texas gas plant faces ongoing battle with oxygen contamination

Duke Energy Field Services (DEFS) is using oxygen (O2) scavenging and ion exchange to battle oxygen contamination at its Wilcox gas plant in Lavaca County, Texas.Oxygen contamination in the amine system has resulted in degradation of the formulated MDEA (methyl diethanolamine) to bicine and heat stable amine salts (HSAS).Plant operationThe Wilcox gas plant, commissioned by DEFS in spring 1999, was built to replace an existing lean-oil absorption plant that had been in service for 47 years. Capacity of the plant is 200 MMscfd of inlet gas received at 950 psig from four major gathering and transportation pipelines.The inlet gas stream contains about 4% carbon dioxide (CO2), 2-3 ppm(vol) hyd...

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