industry application

Magnesium Oxide for Flue Gas Desulfurization

High-activity MgO reagent for Mg-based FGD scrubbers — deep SO₂ removal, low liquid-gas ratio and valuable by-product recovery for power, steel and coking plants.

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so₂ removal ≥ 98%high activity reagentby-product recoverable

Mg-based flue gas desulfurization is the most efficient wet scrubbing route for medium-to-high sulfur fuels. Magnesium oxide reacts with SO₂ to form magnesium sulfite/sulfate, achieving 98%+ removal at liquid-gas ratios far below limestone systems — smaller absorber towers, lower circulation pumping power and no scaling or plugging.

recommended grades

Which Grade to Use

Grade	Key spec	Best for
Active MgO	activity value & fast dissolution	Wet Mg-FGD absorber slurry — maximum reactivity, minimal reagent consumption
Industrial Grade MgO (85–90%)	cost-optimized bulk supply	Coking, sintering and steel-plant flue trains with moderate SO₂ loads
Heavy MgO	high bulk density	Long-haul shipping where freight cost per ton of MgO matters

how it performs

Process Advantages

• Higher removal efficiency: MgSO₃ chemistry is fast and highly soluble — ≥98% SO₂ removal even at high sulfur coal.
• Compact plant: liquid-gas ratio ~30–50% of a limestone process; towers are smaller and cheaper.
• No scaling: soluble reaction products keep heat exchangers and mist eliminators clean.
• By-product value: oxidation of the liquor yields MgSO₄ fertilizer-grade salt; the loop can be regenerated for reagent savings.
• Trio of pollutants: same reagent path captures SO₃ and HCl efficiently.

Full process walkthrough: Magnesium Oxide for Flue Gas Desulfurization: An Efficient FGD Reagent — chemistry, dosing math and by-product handling.