Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Nitrogen or nitrogenous component
Patent
1996-11-01
1999-11-16
Straub, Gary P.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Nitrogen or nitrogenous component
423237, 4232391, 423246, 4232453, 423DIG5, B01D 5356
Patent
active
059852224
ABSTRACT:
Gas-phase methods and systems for reducing NOx emissions and other contaminants in exhaust gases, and industrial processes using the same, are disclosed. In accordance with the present invention, hydrocarbon(s) autoignite and autothermally heat an exhaust gas from an industrial process so that NH.sub.3, HNCO or a combination thereof are effective for selectively reducing NOx autocatalytically. Preferably, the reduction of NOx is initiated/driven by the autoignition of hydrocarbon(s) in the exhaust gas. Within the temperature range of about 900-1600.degree. F., the introduced hydrocarbon(s) autoignite spontaneously under fuel-lean conditions of about 2-18% O.sub.2 in the exhaust gas. Once ignited, the reactions proceed autocatalytically, heating the exhaust gas autothermally.
REFERENCES:
patent: 3867507 (1975-02-01), Myerson
patent: 3873671 (1975-03-01), Reed et al.
patent: 3900554 (1975-08-01), Lyon
patent: 4115515 (1978-09-01), Tenner et al.
patent: 4208386 (1980-06-01), Arand et al.
patent: 4302431 (1981-11-01), Atsukawa et al.
patent: 4602673 (1986-07-01), Michelfelder et al.
patent: 4678643 (1987-07-01), Fetzer
patent: 4719092 (1988-01-01), Bowers
patent: 4719094 (1988-01-01), Riekert et al.
patent: 4731231 (1988-03-01), Perry
patent: 4751065 (1988-06-01), Bowers
patent: 4770863 (1988-09-01), Epperly et al.
patent: 4777024 (1988-10-01), Epperly et al.
patent: 4780289 (1988-10-01), Epperly et al.
patent: 4800068 (1989-01-01), Perry
patent: 4803059 (1989-02-01), Sullivan et al.
patent: 4830839 (1989-05-01), Epperly et al.
patent: 4844878 (1989-07-01), Epperly et al.
patent: 4851201 (1989-07-01), Heap et al.
patent: 4861567 (1989-08-01), Heap et al.
patent: 4863704 (1989-09-01), Epperly et al.
patent: 4863705 (1989-09-01), Epperly et al.
patent: 4867953 (1989-09-01), Riekert et al.
patent: 4873066 (1989-10-01), Epperly et al.
patent: 4877590 (1989-10-01), Epperly et al.
patent: 4877591 (1989-10-01), Epperly et al.
patent: 4886650 (1989-12-01), Perry
patent: 4888165 (1989-12-01), Epperly et al.
patent: 4902488 (1990-02-01), Epperly et al.
patent: 4908193 (1990-03-01), Perry
patent: 4927612 (1990-05-01), Bowers
patent: 4978514 (1990-12-01), Hofmann et al.
patent: 4985218 (1991-01-01), Devita
patent: 4997631 (1991-03-01), Hofmann et al.
patent: 5017347 (1991-05-01), Epperly et al.
patent: 5047219 (1991-09-01), Epperly et al.
patent: 5048432 (1991-09-01), Hofmann et al.
patent: 5057293 (1991-10-01), Epperly et al.
patent: 5078064 (1992-01-01), Breen et al.
patent: 5139754 (1992-08-01), Luftglass et al.
patent: 5139755 (1992-08-01), Seeker et al.
patent: 5286467 (1994-02-01), Sun et al.
patent: 5510092 (1996-04-01), Mansour et al.
patent: 5899269 (1999-05-01), Wellington et al.
Olsen "Unit Processes and Principles of Chemical Engineering" New York, D Van Nostrand Co., pp. 1-3, Jul. 1932.
Perry et al. "Chemical Engineers' Handbook", 5th Edition McGraw-Hill Book Co., USA., pp. 22-4 to 22-7, 22-136 to 22-144. ISBN 0-07-049478-9, 1973 No month.
Levenspiel "Chemical Reaction Engineering", 2nd. Edition John Wiley & Sons, Canada, pp. 56-60, 149-157 & 226-231 ISBN 0-471-53016-6, 1972 No month.
Lyon "Controlling Nitrogen Oxides Emissions by a Noncatalytic Process"; Combust. Sci. and Tech., vol. 25, No. 3, 1987, pp. 231-236. No month.
Lyon and Hardy "Discovery and Development of Thermal DeNOx Process";Ind. Eng. Chem. Fundam. vol. 25, No. 1, 1986, pp. 19-24. No month.
Caton and Siebers "Comparison of Nitric Oxide Removal by Cyanuric Acid and by Ammonia"; Combust. Sci. and Tech, vol. 65, 1989, pp. 277-293. No month.
Dean, Hardy and Lyon "Kinetics and Mechanism of NH3 Oxidation"; Nineteenth Symposium on Combustion/The Combustion Institute, 1982, pp. 97-105. No month.
Hurst "Improved Thermal DeNOx Process Verified by Field Testing"; Exxon Technology, Presented at Air Pollution Control Assn., Annual Meeting in San Francisco, California on Jun. 27, 1984, pp. 1-13.
Palekar Vishwesh
Ramavajjala Madhu
Slone Ralph J.
Sudduth Bruce C.
Noxtech, Inc.
Straub Gary P.
Vanoy Timothy C
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