Refinery Fuel-Gas H₂S Scavenger — Triazine

Amine treating removes the bulk of H2S, but residual H2S can remain during swings, amine-unit upsets, or in smaller off-gas/low-pressure streams that do not justify their own amine system. A triazine scavenger polishes that residual H2S so fuel gas protects burners, meets emissions limits and avoids corrosion.

Typical points are fuel-gas headers downstream of amine treating, FCC and coker off-gas, low-pressure or intermittent gas streams, and flare-gas recovery. Injection is by quill/mixer with enough contact time, or via a small contactor where the H2S load justifies it.

MEA Triazine 78% gives high active content for cost-effective polishing; MMA Triazine 40% is chosen for hotter or continuous service where more soluble by-products reduce solids/scaling. Grade is matched to temperature, H2S load and stream type.

No — triazine is a non-regenerative polish/backup, most economical below a few hundred ppm H2S. For high, continuous H2S loads, regenerative amine treating is the primary technology; triazine handles the residual, the small streams and the upsets.

Dose to the measured H2S load, select a soluble-by-product grade for hot streams, ensure mixing/contact time, and monitor spent scavenger. Polymeric dithiazine fouling is driven by highly spent MEA triazine left under continued H₂S exposure, so the goal is to manage the scavenger before it becomes over-spent — not to under-dose.

Yes. Vasudev Chemo Pharma manufactures MEA Triazine 78% and MMA Triazine 40% and exports globally with batch COA and application guidance for refinery fuel-gas and off-gas H2S polishing.