High-temperature denitration catalysts and processes for...

Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Nitrogen or nitrogenous component

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C502S350000, C502S349000, C502S305000, C502S216000, C502S217000, C502S219000, C502S220000, C502S202000

Reexamination Certificate

active

10509160

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.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

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.

Rate now

     

Profile ID: LFUS-PAI-O-3939508

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.