Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Nitrogen or nitrogenous component
Reexamination Certificate
2007-06-26
2007-06-26
Johnson, Edward M. (Department: 1754)
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Nitrogen or nitrogenous component
C423S244090, C423S247000
Reexamination Certificate
active
10660521
ABSTRACT:
In a method for operating a flue gas purification plant (10) including a plurality of parallel of absorber chambers (11), in which in each absorber chamber (11), CO and NO are simultaneously oxidized by a catalyst in a first absorber (15) according to the SCONOx principle and the resulting NO2is absorbed on the catalyst surface, in which SO2is furthermore oxidized by a catalyst in a second absorber (14) upstream of the first absorber (15) according to the SCOSOx principle and the resulting SO3is absorbed on the catalyst surface. The absorber chambers (11) are successively regenerated by a regeneration gas containing hydrogen and/or hydrogen compounds in regularly repeating regeneration cycles affecting all the absorber chambers (11). In order to improve reliability and reduce operating costs in such a method, the regeneration time of the second absorber (14) within the regeneration cycle is respectively selected to be long enough to guarantee sufficient regeneration of the second absorber (14).
REFERENCES:
patent: 4012488 (1977-03-01), Brocoff
patent: 4804522 (1989-02-01), Hass
patent: 5599758 (1997-02-01), Guth et al.
patent: 5665321 (1997-09-01), Campbell et al.
patent: 5953911 (1999-09-01), Guth et al.
patent: 2002/0128147 (2002-09-01), Kaefer
patent: 197 53 573 (1999-06-01), None
patent: 100 49 801 (2000-10-01), None
patent: 100 49 040 (2002-06-01), None
patent: 01/51178 (2001-07-01), None
Czarnecki, L., et al., “SCONOx™—Ammonia Free NOx Removal Technology For Gas Turbines”, Proceedings of 2000 International Joint Power Generation Conference, Miami Beach, FL, Jul. 23-26, 2000, pp. 1-10 (2000, ASME, New York).
U.S. Appl. No. 10/660,522, Käfer, filed Sep. 12, 2003.
U.S. Appl. No. 10/660,523, Käfer, filed Sep. 12, 2003.
Search Report for German Patent Appl. No. 102 42 776.3 (Jul. 29, 2005).
Search Report from GB 0321471.5 (Feb. 25, 2004).
Alstom Technology Ltd.
Cermak Adam J.
Cermak & Kenealy LLP
Johnson Edward M.
LandOfFree
Method for operating a flue gas purification plant does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for operating a flue gas purification plant, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for operating a flue gas purification plant will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3877754