Reduction of gas phase reduced nitrogen species in partial...

Details Reduction of gas phase reduced nitrogen species in partial... Reduction of gas phase reduced nitrogen species in partial...

2011-03-15

2011-03-15

Griffin, Walter D (Department: 1774)

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

C502S241000, C502S242000, C502S243000, C502S244000, C502S245000, C502S247000, C502S250000, C502S251000, C502S252000, C502S262000, C502S263000, C502S302000, C502S303000, C502S304000, C502S312000, C502S314000, C502S318000, C502S326000, C502S327000

Reexamination Certificate

active

07906015

ABSTRACT:
Reduced emissions of gas phase reduced nitrogen species in the off gas of an FCC regenerator operated in a partial or incomplete mode of combustion is achieved by contacting the off gas with an oxidative catalyst/additive composition having the ability to reduce gas phase nitrogen species to molecular nitrogen and to oxidize CO under catalytic cracking conditions. The oxidative catalyst/additive composition is used in an amount less than the amount necessary to prevent afterburn. Fluidizable particles of the oxidative catalyst/additives are circulated throughout the partial or incomplete burn FCC unit along with the FCC catalyst inventory. The flue gas having a reduced content of gas phase reduced nitrogen species and NOxis passed to a downstream CO boiler, preferably a low NOxCO boiler. In the CO boiler, as CO is oxidized to CO2, a reduced amount of gas phase reduced nitrogen species is oxidized to NOx, thereby providing an increase in the overall reduction of NOxemitted into the environment.

REFERENCES:
patent: 4153535 (1979-05-01), Vasalos et al.
patent: 4199435 (1980-04-01), Chessmore et al.
patent: 4290878 (1981-09-01), Blanton, Jr.
patent: 4368057 (1983-01-01), Matthews
patent: 4428827 (1984-01-01), Hobbs et al.
patent: 4434147 (1984-02-01), Dimpfl et al.
patent: 4437147 (1984-03-01), Takamura et al.
patent: 4469589 (1984-09-01), Yoo et al.
patent: 4471070 (1984-09-01), Siefert et al.
patent: 4472267 (1984-09-01), Yoo et al.
patent: 4472532 (1984-09-01), Mooi
patent: 4476245 (1984-10-01), Siefert
patent: 4492677 (1985-01-01), Yoo et al.
patent: 4492678 (1985-01-01), Yoo et al.
patent: 4495304 (1985-01-01), Yoo et al.
patent: 4495305 (1985-01-01), Yoo et al.
patent: 4522937 (1985-06-01), Yoo et al.
patent: 4529502 (1985-07-01), Wang
patent: 4529574 (1985-07-01), Wang
patent: 4613428 (1986-09-01), Edison
patent: 4626419 (1986-12-01), Lewis et al.
patent: 4642178 (1987-02-01), Yoo et al.
patent: 4728635 (1988-03-01), Bhattacharyya
patent: 4744962 (1988-05-01), Johnson et al.
patent: 4755282 (1988-07-01), Samish et al.
patent: 4758418 (1988-07-01), Yoo et al.
patent: 4778665 (1988-10-01), Krishnamurthy et al.
patent: 4790982 (1988-12-01), Yoo et al.
patent: 4812430 (1989-03-01), Child
patent: 4812431 (1989-03-01), Child
patent: 4830840 (1989-05-01), Bhattacharyya
patent: 4851374 (1989-07-01), Yan et al.
patent: 4883783 (1989-11-01), Burk et al.
patent: 4904627 (1990-02-01), Bhattacharyya
patent: 4957718 (1990-09-01), Yoo et al.
patent: 4957892 (1990-09-01), Yoo et al.
patent: 4963520 (1990-10-01), Yoo et al.
patent: 4973399 (1990-11-01), Green et al.
patent: 4980052 (1990-12-01), Green et al.
patent: 5002654 (1991-03-01), Chin
patent: 5011592 (1991-04-01), Owen et al.
patent: 5021144 (1991-06-01), Altrichter
patent: 5037538 (1991-08-01), Chin et al.
patent: 5057205 (1991-10-01), Chin et al.
patent: 5077252 (1991-12-01), Owen et al.
patent: 5173278 (1992-12-01), Marler
patent: 5240690 (1993-08-01), Tang
patent: 5242881 (1993-09-01), Tang
patent: 5268089 (1993-12-01), Avidan et al.
patent: 5364517 (1994-11-01), Dieckmann et al.
patent: 5372706 (1994-12-01), Buchanan et al.
patent: 5382352 (1995-01-01), Hansen et al.
patent: 5443807 (1995-08-01), Tang
patent: 5547648 (1996-08-01), Buchanan et al.
patent: 5565181 (1996-10-01), Dieckmann et al.
patent: 5565399 (1996-10-01), Fraenkel et al.
patent: 5705053 (1998-01-01), Buchanan
patent: 5716514 (1998-02-01), Buchanan
patent: 5830346 (1998-11-01), Harandi et al.
patent: 5908804 (1999-06-01), Menon et al.
patent: 6129834 (2000-10-01), Peters et al.
patent: 6143167 (2000-11-01), Peters et al.
patent: 6165933 (2000-12-01), Peters et al.
patent: 6280607 (2001-08-01), Peters et al.
patent: 6358881 (2002-03-01), Peters et al.
patent: 6379536 (2002-04-01), Peters et al.
patent: 6660683 (2003-12-01), Yaluris et al.
patent: 2004/0086442 (2004-05-01), Vierheilig
patent: 96/34685 (1996-11-01), None
patent: 97/48480 (1997-12-01), None
Yang, Wen-ching. (2003) Handbook of Fluidization and Fluid-particle Systems. CRC Press, 1868 pages.
Meyers, Robert A. (2004) Handbook of Petroleum Refining Processes. McGraw-Hill, 900 pages.
Zhao, X. et al. (1997). Ind. Eng. Chem. Res., 36, 4535-4542.
J.S. Magee and M.M. Mitchell, Jr. Eds. Studies in Surface Science and Catalysis vol. 76, Ch 8, pp. 257-292, Elsevier Science Pulbishers B.V., Amsterdam 1993, ISBN 0-444-89037-8 ; G.W. Young, “Realistic Assessment of FCC Catalyst Performance in the Laboratory,” in Fluid Catalytic Cracking: Science and Technology.
Corma, et al., “Simultaneous Catalytic Removal of Sox and Nox with Hydrotalcite-Derived Mixed Oxides Containing Copper, and Their Possibilities to be Used in FCC Units,” Journal of Catalysis, 170,140 (1997).
Venuto and Habib, “Fluid Catalytic Cracking with Zeolite Catalysts,” Marcel Dekker, New York 1979, ISBN 0:8247-6870-1.
Sadeghbeigi, Fluid Catalytic Cracking Handbook, Gulf Publishing Company, Houston, 1995, ISBN 0-88415-290-1.
Scherzer, Octane Enhancing Zeolite FCC Catalysts, Marcel Dekker, Inc., New York, 1990, ISBN 08274-8399-9.
“The John Zink Combustion Handbook,” editor, Charles E. Baulkal, Jr., published by CRC Press, 2001.
G. Yaluris and A.W. Peters “Studying the Chemistry of the FCCU Regenerator in the Laboratory Under Realistic Conditions,” Designing Transportation Fuels for a Cleaner Environment, J.G. Reynolds and M.R. Khan, eds., p. 151, Taylor & Francis, 1999, ISBN: 1-56032-813-4.
“The John Zink Combustion Handbook,” editor, Charles E. Baulkal, Jr., published by CRC Press, 2001.

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