January 2008

Special Report: Gas Processing Developments

Consider improved scrubbing designs for acid gases

Better application of process chemistry enables efficient sulfur abatement

Beitler, C. M., Fisher, K., Mamrosh, D. L., Trimeric Corp.; Stem, S., Montana Refining Co.

Scrubbing of hydrogen sulfide (H2S) using sodium hydroxide (NaOH) solution is a well-established technology. Since this process uses a solvent that cannot be easily regenerated, caustic scrubbers are most often applied in situations where small volumes of H2S must be removed. A review of various caustic-scrubber configurations and their applications highlights important criteria to consider when designing H2S scrubbers for refinery applications. Background. Using sodium hydroxide solution to remove acid gases including H2S is a well-proven method that is practiced in many industrial applications. The process uses a solvent, which cannot be easily regenerated. Accordingly, caustic scrubbers

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