Nitrogen oxides reducing agent and a phosphate
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United States of America Patent
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Feb 6, 1996
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N/A
app pub date -
Mar 10, 1994
filing date -
Mar 10, 1994
priority date (Note) -
Expired
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Abstract
Processes and compositions enable selective noncatalytic reduction (SNCR) in the gas phase at temperatures above 950.degree. C. to reduce the environmental damage caused by NO.sub.x and related emissions. By utilizing a nitrogenous NO.sub.x -reducing agent, such as urea, in combination with a phosphate at a ratio of nitrogen in the NO.sub.x -reducing agent to phosphorous of less than about 50:1, NO.sub.x reduction is improved and carbon monoxide, nitrous oxide and ammonia are maintained at low levels.
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