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US 8,309,046 B2Granted
Methods for removal of mercury from flue gas
AssigneeCalgon Carbon Corporation
InventorsNicholas R. Pollack, Richard A. Hayden
Life of this patent
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Abstract
Methods and systems for reducing mercury emissions are provided herein. The methods, generally, include the steps of burning a heavy metal containing fuel source and introducing sorbent materials and introducing one or more halogen compounds into the combustion chamber and/or exhaust stream to remove the heavy metal.
Claims36
A method for reducing heavy metal emissions comprising:
- burning a heavy metal containing fuel in a combustion chamber;
- introducing molecular halogen or one or more halogen precursors into the combustion chamber or an exhaust stream produced as a result of the burning of the heavy metal containing fuel;
- and
- introducing a sorbent having a mean particle diameter of less than 15 μm into an exhaust stream resulting from burning of the heavy metal containing fuel in the combustion chamber;
- wherein the halogen and sorbent material are introduced at a ratio of from about 0.7 to about 5.7 moles of halogen per pound (lb) of sorbent material.
2 more elements
A flue gas sorbent comprising:
- a sorbent material having a mean particle diameter (MPD) of less than about 15 μm;
- and
- one or more halogens associated with the sorbent material at a ratio of from about 0.7 to about 5.7 moles of halogen per pound (lb) of sorbent material.
Dependencies are inferred from the claim text.