March 2006

Refining Developments

Improve tail gas operations

Innovative operation changes increase run length for sulfur plant

Stavros, J., ConocoPhillips Bayway Refinery

Unwanted side reactions occur with liquid redox methods to remove hydrogen sulfide (H2S) from sulfur plant tail gas. These side reactions contribute to higher operating problems including higher corrosion rates, high base (caustic and soda ash) consumption and expenses, unit foaming and plugging incidents, etc. In this case history, a California refinery changed operating methods and targets for the Claus and liquid redox units. These actions improved operations, increased unit availability, reduced maintenance costs and lowered operating expenses. The refinery now attains longer run lengths for the sulfur plant. BACKGROUND Liquid redox solution is used to remove H2S from sulfur plant

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