Process for treating coal to reduce sulfur content in flue gases

Details Process for treating coal to reduce sulfur content in flue gases Process for treating coal to reduce sulfur content in flue gases

1986-07-25

1987-10-27

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Sulfur or sulfur containing component

110343, 110345, B01J 800, C01B 1700

Patent

active

047028998

ABSTRACT:
A process for reducing the sulfur oxide content of flue gases produced by combustion of sulfur-containing coal containing cations of alkali metals, alkaline earth metals or both, in ion exchangeable form. Flue gases containing sulfur oxides are recycled to contact coal awaiting combustion. Sulfur oxides are absorbed on the coal during the contact step, which is conducted in the presence of water. Sulfur oxides react with alkali and alkaline earth metal cations, and are oxidized to form sulfate reaction products. When the treated coal is burned, these sulfate reaction products are retained in the coal ash.

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