F - Mech Eng,Light,Heat,Weapons – 23 – N
Patent
F - Mech Eng,Light,Heat,Weapons
23
N
158/2
F23N 5/00 (2006.01)
Patent
CA 1090693
Abstract A method of at least partially burning a hydrocarbon and/or carbonaceous fuel in order to yield hot gaseous products of relatively low pollutant content, in which the fuel is partially burned in a first stage flame under such conditions that the partially combusted fuel has a tempe- rature in the range 800 to 1600°C (e.g., about 1150°C) and is sub-stantially free of smoke and/or carbon, bringing the partially combusted fuel at 800 to 1600 C into contact with a substantially non-volatile catalyst (19) which is active for reducing the amount of NOx in the partially combusted fuel, and then at least partially burning the partially combusted fuel, after contact with the catalyst (19) in a second stage flame to yield the desired low pollutant hot gaseous products. Preferably one or both of the said flames burns in contact with a substantially non-volatile catalyst (25, 23) to reduce still further the NOt content of the final gaseous products. The preferred non-volatile catalysts (19, 25, 23) comprise either a mixture of iron and chromium oxides or cobalt oxide.
312541
Borden Ladner Gervais Llp
Exxon Research And Engineering Company
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