F - Mech Eng,Light,Heat,Weapons – 23 – N
Patent
F - Mech Eng,Light,Heat,Weapons
23
N
158/1
F23N 1/00 (2006.01) F23C 6/04 (2006.01)
Patent
CA 1091570
ABSTRACT OF THE DISCLOSURE Fuels containing fixed-nitrogen chemical species are combusted in a multi-stage process. The process which converts substantially all of the fixed-nitrogen into molecular nitrogen (and thus avoids the formation of significant amounts of nitrogen oxides from the fixed-nitrogen) consists of four steps: (a) mixing said fuel with at least one first oxidizing agent in amounts such that the equivalence ratio of said fuel to said oxidizing agent is at least about 1.2; (b) partially combusting the mixture resulting from step (a) in at least one first stage at a first temperature of about 1950 to about 2400°K., with a residence time of at least 0.01 second; (c) mixing the combustion products resulting from step (b) with at least one second oxidizing agent in an amount such that the equivalence ratio of combus- tion products to the total amount of oxidizing agents in the mixture will be about 1.0 to less, such mixing taking place under conditions such that the temperature of the mixture will not exceed about 1750°K.; and (d) completely combusting the mixture resulting from step (c) in at least one second stage at a second temperature of less than about 1750°K.
316985
Bartok William
Blair David W.
Longwell John P.
Sarofim Adel F.
Borden Ladner Gervais Llp
Exxon Research And Engineering Company
Massachusetts Institute Of Technology
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