Reducing sulfur content in flue gases produced by coal combustio

Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Sulfur or sulfur containing component

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110343, 110345, B01J 800, C01B 1700

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active

046456546

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 adsorbed on the coal during the contact step, react with alkali metal and alkaline earth metal cations, and are oxidized to form sulfate reaction products. When the treated coal is burned, these reaction products are retained in the coal ash.

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Description of Fluidized Bed Combustion Technology in Prior Art Statement.

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