Lignosulfonate-modified calcium hydroxide for SO.sub.2 control during furnace injection
AssigneeThe United States of America as represented by the United States Environmental Protection Agency
InventorsDavid A. Kirchgessner, Jeffrey M. Lorrain
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Abstract
A method is provided for removing sulphur-containing gases from fossil fuel-fired combustors comprising the step of introducing sorbent particles modified with lignosulfonates into the exhaust gases.
Claims5
A method for removing sulfur oxide sulfur oxide-containing gases from exhaust gases of a fossil fuel-fired combustor comprising the step of introducing into said exhaust gases solid particles capable of reacting with said sulfur oxide-containing gases, said particles comprising a surface-modified sorbent selected from the group consisting of alkali metal lignosulfonate-modified calcium hydroxide and alkali metal lignosulfonate-modified calcium magnesium hydroxide, wherein said alkali metal lignosulfonate comprises up to 5% by weight of the total dry weight of said surface-modified sorbent.
Dependencies are inferred from the claim text.