초록

Disclosed is a process for non-catalytically removing NO from combustion effluent streams at temperatures from about 1300°K. to 1600°K. by injecting ammonia immediately before or directly into a zone where the combustion effluent is cooling at a rate of at least about 250°K.

대표청구항 ▼

In a process for reducing NO concentration of a combustion effluent wherein ammonia is injected into a flowing combustion effluent containing NO and at least 0.1 volume percent oxygen when at least a portion of the effluent is at a temperature within the range of about 1300°K. to 1600°K. and wherein

In a process for reducing NO concentration of a combustion effluent wherein ammonia is injected into a flowing combustion effluent containing NO and at least 0.1 volume percent oxygen when at least a portion of the effluent is at a temperature within the range of about 1300°K. to 1600°K. and wherein the combustion effluent passes through at least one cooling zone in which it is cooling at a rate of at least about 250°K. per second, the improvement which comprises injecting ammonia into the combustion effluent at a point where the combustion effluent: (a) is at a temperature of about 1300°K. to 1600°K. and (b) is cooling at a rate of at least about 250°K. per second, wherein the amount of ammonia injected is such that a reduction of NO in the combustion effluent is realized.