Application guide

Marine & Bunker Fuel H₂S Scavenger — Triazine

Residual and bunker fuel oils evolve hydrogen sulfide into cargo and storage tank vapour space — a crew-safety hazard and a fuel-specification problem. Triazine H₂S scavengers lower liquid- and vapour-phase H₂S to help meet ISO 8217 limits and protect people during storage, bunkering and transport.

Quick answer: triazine is dosed into fuel oil/cargo to react out H₂S, cutting both liquid-phase H₂S and headspace vapour to meet marine-fuel limits. MMA Triazine 40% suits heavy/warm fuel (soluble by-products); MEA Triazine 78% gives high-active dosing. Dose to the measured H₂S and confirm spec before delivery.

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Where H₂S Is Managed in the Fuel Chain

  • Refinery / fuel-oil blending stage
  • Shore storage and barge / cargo tanks
  • During bunkering and transfer
  • Fuel-oil tanker cargoes and enclosed-space entry

Dosing Notes

  • Dose to the measured H₂S load; avoid over-treatment.
  • Select a soluble-by-product grade for heavy/warm fuel.
  • Ensure mixing and contact time before enclosure/transfer.
  • Confirm treated fuel meets the applicable H₂S specification.

Related Reading

Frequently Asked Questions

Why is H2S a concern in marine and bunker fuel?+
Residual fuel oil, bunker fuel and heavy fuel-oil cargoes can evolve hydrogen sulfide into tank vapour space. This is a crew-safety hazard during loading, transport and discharge, and marine fuel standards such as ISO 8217 place limits on H2S in the liquid phase, so suppliers manage H2S with scavengers.
How does triazine reduce H2S in fuel oil?+
Triazine H2S scavenger is dosed into the fuel or cargo so it reacts with hydrogen sulfide to form stable, non-volatile products, lowering both liquid-phase H2S and the vapour concentration above it. This helps meet cargo/fuel H2S limits and protects personnel in enclosed spaces.
Which triazine grade suits heavy fuel oil and bunkers?+
Heavy, sometimes warm fuel-oil service favours a grade with soluble reaction by-products to avoid solids — often MMA triazine 40% — while MEA triazine 78% offers high-active, cost-effective dosing. Grade is selected to the fuel, temperature and H2S load.
Does triazine affect fuel quality or ISO 8217 parameters?+
Dosed correctly to the H2S load, triazine targets H2S without materially affecting bulk fuel properties. Over-treatment should be avoided; dose to the measured H2S and confirm the treated fuel meets the relevant specification before delivery.
Where is the scavenger added in the marine fuel chain?+
It can be dosed at the refinery/blending stage, into storage or barge/cargo tanks, or during bunkering, with mixing and contact time so the scavenger reacts before the fuel is enclosed or transferred.
Do you supply triazine for marine fuel and cargo operations?+
Yes. Vasudev Chemo Pharma manufactures MEA Triazine 78% and MMA Triazine 40% and exports globally with batch COA and application guidance for marine fuel, bunker and fuel-oil cargo H2S suppression.

Managing H₂S in marine fuel?

Vasudev Chemo Pharma supplies MEA Triazine 78% and MMA Triazine 40% with application guidance, batch COA, and global export from our ISO 9001:2015 certified facility in Gujarat, India.

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