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US 5,531,973 AGranted
Production of plasma generated NO.sub.x reducing precursors from a molecular nitrogen and hydrocarbon mixture
AssigneeThe Babcock & Wilcox Company
InventorHamid Sarv
Life of this patent
Estimating the term…
Abstract
A method for reducing NO.sub.x produced by the burning of fuels includes providing a hydrocarbon and nitrogen mixture to a plasma arc generator for producing NO.sub.x reducing precursors which are, in turn, provided near the burning of the fuel for reacting and reducing NO.sub.x emissions. These precursors include N, H, HCN, CH.sub.i and NH.sub.i, etc.
Claims11
A method for reducing NO.sub.x produced by a burning of a fuel, the method comprising the steps of:
- burning a fuel with a low NO.sub.x burner to produce a primary fuel-rich combustion zone which produces NO.sub.x followed by a burnout zone;
- providing a hydrocarbon and nitrogen mixture;
- providing a plasma generator;
- supplying the hydrocarbon and nitrogen mixture to the plasma generator for producing NO.sub.x reducers;
- and
- providing the NO.sub.x reducers to the fuel-rich combustion zone which is at a temperature exceeding 1000.degree. C. for reacting with the NO.sub.x.
3 more elements
A method for reducing NO.sub.x produced by a burning of a fuel, the method consisting essentially of the steps of:
- burning a fuel to produce a primary fuel-rich combustion zone which produces NO.sub.x followed by a burnout zone;
- providing a hydrocarbon and nitrogen mixture;
- providing a plasma generator;
- supplying the hydrocarbon and nitrogen mixture to the plasma generator for producing NO.sub.x reducers;
- and
- providing the NO.sub.x reducers to the fuel-rich combustion zone which is at a temperature exceeding 1000.degree. C. for reacting with the NO.sub.x.
3 more elements
Dependencies are inferred from the claim text.