Background and Challenges Athlon Solutions was approached by a Gulf Coast Asphalt Terminal to assist in managing hydrogen sulfide (H 2 S) gas. The facility receives asphalt blending components to produce road asphalt and roofing tar. The majority of the blending components originate from refineries and is typically sour, with H 2 S levels commonly exceeding 5,000 parts per million. At 100 ppm, H 2 S is immediately dangerous to life and health,

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