Catalytic decomposition of cyanuric acid and use of product to reduce nitrogen oxide emissions
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United States of America Patent
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Feb 11, 1992
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app pub date -
Sep 20, 1990
filing date -
Sep 20, 1990
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Abstract
A method is described for decomposing cyanuric acid at temperatures of less than about 1000.degree. F., and the method comprises heating the cyanuric acid in the presence of a decomposition catalyst which is effective at below about 1000.degree. F. Examples of useful decomposition catalysts are zirconium, phosphorus and mixtures thereof. Preferably at least some of the zirconium or phosphorus is in the plus four oxidation state. A method also is described for reducing the nitrogen oxide content of gas streams which comprises contacting the gas streams containing nitrogen oxide with an amount of the gaseous decomposition product mixture obtained by decomposing cyanuric acid in the presence of a decomposition catalyst at a temperature of less than about 1000.degree. F.
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