LEXTRAN Ltd.

Sulfur oxides (SOx) removal / Nitrogen oxides (NOx) removal / Mercury (Hg) - removal

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Power plants, as well as other industrial installations burning coal and/or heavy fuels, are a significant source of three major polluting and toxic emissions: sulfur oxides (SOx), nitrogen oxides (NOx), mercury (Hg) and other heavy metals.

Numerous technologies exist to reduce the emissions of these pollutants, first and foremost to meet government emission regulations, and to cooperate with the conservation movement of globe protection. However, the economics and operational complexity of the prevailing technologies make them less amenable for simple and affordable implementations.

Lextran’s multiple pollutants removal technology enables the absorption of the following pollutants from flue gases in one single pass:

  • Sulfur oxides (SOx) - removal of 99%, unconditional of inlet concentration.
  • Nitrogen oxides (NOx) - removal of up to 95% of inlet concentration.
  • Mercury (Hg) - removal of 98% of elemental and oxidized mercury.

The absorption is realized by reacting the said pollutants with Lextran catalyst in wet scrubber environment process. The Lextran catalyst is an organic substance in an emulsion form.

The Lextran catalyst, produced by a proprietary know how process, contains an active sulfur-oxygen functional group, having catalytic properties which enhance the oxidation reactions of SOx and NOx into SO4 and NO3 anions.

After facilitating the initial oxidation, the Lextran catalyst is released and recycled back into the process leaving the pollutants in chemical form amenable to become commercially beneficial by-products (Fertilizers) with a further neutralization by ammonia, KOH, or other basic reagents to control the type of byproduct.

The possible byproducts are therefore mainly, ammonium nitrate, ammonium sulfate, potassium sulfate, potassium nitrate, and others.

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