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US 2020/0332213 A1Published application
Method and additive for controlling nitrogen oxide emissions
AssigneeADA-ES, Inc.
InventorsWilliam J. Morris, Kenneth E. Baldrey, Constance Senior, Ramon Bisque
Life of this patent
Estimating the term…
Abstract
The present disclosure is directed to an additive mixture and method for controlling nitrogen oxide(s) by adding the additive mixture to a feed material prior to combustion.
Claims27
A method for reducing NOx emissions in a pulverized coal boiler system, comprising:
- contacting a feed material with an additive mixture comprising an additive and a thermal stability agent to form an additive-containing feed material, wherein the additive, in the absence of the thermal stability agent, is unstable when the feed material is combusted;
- and
- combusting the additive-containing feed material to produce a contaminated gas stream comprising a contaminant produced by combustion of the feed material and the additive or a derivative thereof, wherein the additive or a derivative thereof removes or causes removal of the contaminant.
A method, comprising:
- contacting a feed material with an nitrogenous material and a thermal stability agent to form an additive-containing feed material, wherein the nitrogenous material, in the absence of the thermal stability agent, is thermally unstable in the presence of combustion of the feed material;
- and
- combusting the additive-containing feed material to produce a contaminated gas stream comprising a nitrogen oxide produced by combustion of the feed material and the nitrogenous material and/or a derivative thereof, wherein the nitrogenous material or a derivative thereof removes or causes removal of the nitrogen oxide.
Dependencies are inferred from the claim text.