Advanced reburning for reduction of NO.sub.x emissions in combus

Details Advanced reburning for reduction of NO.sub.x emissions in combus Advanced reburning for reduction of NO.sub.x emissions in combus

1991-03-22

1992-08-18

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

423239, C01B 2100, B01J 800

Patent

active

051397552

ABSTRACT:
Techniques for enhancing the burnout zone chemistry for NO.sub.x reduction are disclosed. The key parameters for the enhancement of burnout zone chemistry are: (a) a reaction temperature in the range from about 1300.degree. F. to about 1900.degree. F., and optimally in the range from 1400.degree.-1700.degree. F.; (b) a carbon monoxide concentration below about 0.5 percent; and (c) the presence of nitrogenous reducing species. By controlling the stoichiometry associated with reburning to produce a slightly fuel-rich region for selective reducing agent injection, reductions can be achieved at relatively low temperatures which approach those obtained by conventional catalytic reduction.

REFERENCES:
patent: 4851201 (1989-07-01), Heap et al.
patent: 4861567 (1989-08-01), Heap et al.

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