Case History

Complete decontamination of over 62,000 ppm H2S in an SRU Sour Water Sump utilizing FQE® H2S Scavenger decreases outage time by over 95% in large Texas petroleum refinery

Results Achieved

Complete elimination of hydrogen sulfide level
Over 95% reduction in outage time
No personnel exposure to
hazardous materials

Chemicals Utilized

H2S scavenger for the rapid and permanent elimination of H2S

A large petroleum refinery in Texas used our hydrogen sulfide abatement product, FQE H2S Scavenger, to decontaminate the sour water sump of the sulfur recovery unit (SRU).

The initial H2S readings from the sour water sump exceeded 62,000 ppm (6.2%). A 10% FQE H2S Scavenger mixture in water was prepared and added to a vacuum truck. The sump contents were vacuumed into the truck containing the FQE H2S Scavenger. The truck contents were sampled five minutes later with the H2S being reported at 0 ppm. A 10% solution of FQE H2S Scavenger was added to the sour water sump to treat the solids within. The liquid was circulated for 10 minutes and then sampled. There was 0 ppm hydrogen sulfide detected in the sump solids. They were disposed in the plant without an H2S release.

Typically, this process is conducted by the slow addition of a strong oxidizing liquid over a 2-3 day period of time, resulting in extra time and additional disposal considerations being required.

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