Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Waste gas purifier
Reexamination Certificate
2007-01-09
2009-11-03
Nguyen, Cam N (Department: 1793)
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Waste gas purifier
C422S170000, C422S180000, C502S327000, C502S332000, C502S334000, C502S339000, C502S354000, C502S355000, C502S415000, C502S439000, C502S527120, C502S527180, C502S527190
Reexamination Certificate
active
07611680
ABSTRACT:
An engine exhaust catalyst containing precious metal nanoparticles is promoted with bismuth. The bismuth promotion improves the catalyst's CO oxidation performance. Also, by varying the amount of bismuth that is added, the NO conversion rate that can be realized with the catalyst can be controlled. The control over the NO conversion rate is important because the passive regenerative performance of a particulate filter used in engine exhaust systems is based on the amount NO2that is present in the exhaust stream that reaches the particulate filter. The amount of NO2being produced needs to be optimized (not necessarily maximized) so that adequate particulate filter regeneration performance can be maintained while avoiding unused, toxic NO2from being exhausted into the atmosphere.
REFERENCES:
patent: 4025606 (1977-05-01), Acres
patent: 4079097 (1978-03-01), Antos
patent: 4139495 (1979-02-01), Antos
patent: 4529718 (1985-07-01), Dupin
patent: 4624940 (1986-11-01), Wan et al.
patent: 4868150 (1989-09-01), Spooner et al.
patent: 4977129 (1990-12-01), Ernest
patent: 5120695 (1992-06-01), Blumrich et al.
patent: 5591689 (1997-01-01), Wu et al.
patent: 5849256 (1998-12-01), Deeba et al.
patent: 5911961 (1999-06-01), Horiuchi et al.
patent: 6022826 (2000-02-01), Deeba et al.
patent: 6150296 (2000-11-01), Heinerman et al.
patent: 6627777 (2003-09-01), Rossi et al.
patent: 6667270 (2003-12-01), Tanev
patent: 6685899 (2004-02-01), Park
patent: 6685900 (2004-02-01), Domesle et al.
patent: 6858769 (2005-02-01), Woodle et al.
patent: 6875253 (2005-04-01), Daimon et al.
patent: 6927191 (2005-08-01), Kawabata et al.
patent: 7138358 (2006-11-01), Huang et al.
patent: 7351382 (2008-04-01), Pfeifer et al.
patent: 7381683 (2008-06-01), Wang et al.
patent: 7538063 (2009-05-01), Tanev
patent: 2003/0220193 (2003-11-01), Tanev
patent: 2004/0065078 (2004-04-01), Schafer-Sindlinger et al.
patent: 2004/0126287 (2004-07-01), Zhang et al.
patent: 2005/0282698 (2005-12-01), Southward et al.
patent: 1201300 (2004-09-01), None
T. Mallat et al., “Selective Oxidation of Cinnamyl Alcohol to Cinnamaldehyde with Air over Bi-Pt/Alumina Catalysts,” Journal of Catalysis 153, Jan. 3, 1995. pp. 131-143.
Csilla Keresszegi et al., “A Simple Discrimination of the Promoter Effect in Alcohol Oxidation and Dehydrogenation over Platinum and Palladium,” Journal of Catalysis 225, Apr. 5, 2004, pp. 138-146.
R. Burch et al., “A Combined Transient and Computation Study of the Dissociation of N2O on Platinum Catalysts,” Journal of Catalysis 224, Mar. 5, 2004. pp. 252-260.
Serena Biella et al., “Selective Oxidation of D-Glucose on Gold Catalyst,” Journal of Catalysis 206, Nov. 20, 2001. pp. 242-247.
Hiroshi Kimura et al., “Selective Oxidation of Glycerol on a Platinum-Bismuth Catalyst,” Applied Catalysis A: General 96 (1993), pp. 217-228, (APCAT A2466); and Erratum, Applied Catalysis A: General 123 (1995), p. 323.
GB International Search Report, GB0710116.5, Oct. 2, 2007.
Fujdala Kyle L.
Jia Jifei
Truex Timothy J.
Nanostellar, Inc.
Nguyen Cam N
Patterson & Sheridan LLP
LandOfFree
Platinum-bismuth catalysts for treating engine exhaust does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Platinum-bismuth catalysts for treating engine exhaust, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Platinum-bismuth catalysts for treating engine exhaust will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4073173