Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Nitrogen or nitrogenous component
Reexamination Certificate
2008-07-08
2008-07-08
Vanoy, Timothy C. (Department: 1793)
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Nitrogen or nitrogenous component
C502S350000, C502S349000, C502S305000, C502S216000, C502S217000, C502S219000, C502S220000, C502S202000
Reexamination Certificate
active
07396518
ABSTRACT:
The present invention provides a method of high-temperature denitration characterized in that NOx in an exhaust gas is reduced at 450° to 800° C. using ammonia as a reducing agent in the presence of a catalyst which comprises zirconium oxide and SO3or SO42−and has solid acid strength (Ho) of −11.93 or lower. The present invention also provides a method of high temperature denitration characterized in that NOx in an exhaust gas is reduced at 450° to 800° C. using ammonia as a reducing agent in the presence of a catalyst wherein at least one of tungsten oxide, molybdenum oxide and boron oxide is supported on a carrier comprising zirconium oxide and SO3or SO42−and having solid acid strength (Ho) of −11.93 or lower.
REFERENCES:
patent: 4085193 (1978-04-01), Nakajima et al.
patent: 5191139 (1993-03-01), Sanderson et al.
patent: 5336476 (1994-08-01), Kintaichi et al.
patent: 5510309 (1996-04-01), Chang et al.
patent: 5658546 (1997-08-01), Kobayashi et al.
patent: 5780382 (1998-07-01), Chang et al.
patent: 5780383 (1998-07-01), Hollstein et al.
patent: 6177596 (2001-01-01), Yadav et al.
patent: 58-193733 (1983-11-01), None
M. Ichiki et al., “Development of the NH3-SCR catalyst for Simple Cycle Gas Turbine”, Hitachi Zosen Giho, 2002, vol. 63, No. 1, pp. 10-13.
M. Akiyama et al., “De-Nox Catalyst Composed of Ceramic Paper—Performance of NOXNON-700”, Shokubai, 1996, vol. 38, No. 2, p. 103.
International Search Report for PCT/JP03/03783 mailed on Jul. 15, 2003.
Hikazutani Susumu
Ichiki Masayoshi
Yano Kazuhiro
Cheng Law Group PLLC
Hitachi Zosen Corporation
Vanoy Timothy C.
LandOfFree
High-temperature denitration catalysts and processes for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High-temperature denitration catalysts and processes for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High-temperature denitration catalysts and processes for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2780808