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US 9,957,454 B2Granted
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.
Claims46
A composition, comprising:
- coal particles;
- and
- an additive composition to react with a contaminant from combustion of the coal particles, the additive composition comprising;
- a nitrogenous material comprising one or more of ammonia, an amine, an amide, cyanuric acid, a nitride, and urea;
- a binder;
- and
- a thermal stability agent comprising one or more of a metal hydroxide, metal carbonate, and metal bicarbonate,
- wherein the thermal stability agent is bound by the binder to and substantially surrounds the nitrogenous material and wherein a molar ratio of the thermal stability agent:nitrogenous material ranges from about 1:1 to about 10:1.
5 more elements
A composition, comprising:
- coal particles;
- and
- an additive composition to react with a contaminant from combustion of the coal particles, the additive composition comprising:
- a nitrogenous material in the form of particles comprising one or more of ammonia, an amine, an amide, cyanuric acid, a nitride, and urea, wherein the nitrogenous material particles have an exterior surface;
- and
- a thermal stability agent bound to and substantially surrounding the exterior surface of the nitrogenous material particles to reduce thermal decomposition of the nitrogenous material, wherein the thermal stability agent comprises one or more of a metal hydroxide, metal carbonate, and metal bicarbonate and wherein a weight ratio of the thermal stability agent:nitrogenous material ranges from about 0.5:1 to about 8:1.
3 more elements
A composition, comprising:
- particulate coal;
- and
- an additive composition to react with a contaminant from combustion of the coal particles, the additive composition comprising:
- a nitrogenous material in the form of particles having an exterior particle surface and comprising one or more of ammonia, an amine, an amide, cyanuric acid, a nitride, and urea;
- and
- a thermal stability agent comprising an alkaline earth metal hydroxide, carbonate, and/or bicarbonate, wherein the thermal stability agent is bound to and in contact with at least part of the exterior particle surface and wherein a molar ratio of the thermal stability agent:nitrogenous material ranges from about 1:1 to about 10:1.
3 more elements
Dependencies are inferred from the claim text.