Catalyst and method for clarifying exhaust gas

Details Catalyst and method for clarifying exhaust gas Catalyst and method for clarifying exhaust gas

2008-07-29

2008-07-29

Wood, Elizabeth D. (Department: 1793)

Catalyst, solid sorbent, or support therefor: product or process

Zeolite or clay, including gallium analogs

And additional al or si containing component

C423S239200

Reexamination Certificate

active

10518005

ABSTRACT:
A proton type β zeolite is used as catalyst. Nitrogen oxides in the exhaust gas containing excessive oxygen is reduced/removed by making the exhaust gas contact with the catalyst under the existence of methanol and/or dimethyl ether as reducing agent. It is desirable that a SiO2/Al2O3molar ratio of the proton type β zeolite is within 20-70. Thereby, the present catalyst has an excellent denitration performance and durability even against the exhaust gas containing sulfur oxides, and the denitration performance does not deteriorate even when the exhaust gas is at comparatively low temperature of 300-400° C.

REFERENCES:
patent: 3308069 (1967-03-01), Rosinski et al.
patent: 5041272 (1991-08-01), Tamura et al.
patent: 5279997 (1994-01-01), Montreuil et al.
patent: 5336476 (1994-08-01), Kintaichi et al.
patent: 5374410 (1994-12-01), Grasselli et al.
patent: 5407880 (1995-04-01), Ikeda et al.
patent: 5776423 (1998-07-01), Feeley et al.
patent: 6171556 (2001-01-01), Burk et al.
patent: 6528031 (2003-03-01), Park et al.
patent: 2013869 (1999-07-01), None
patent: 40 16 688 (1991-06-01), None
patent: 0945166 (1999-09-01), None
patent: 2 655 565 (1991-06-01), None
patent: 2 238 784 (1991-06-01), None
patent: 02-139645 (1990-05-01), None
patent: 3-181321 (1991-08-01), None
patent: 04-267946 (1992-09-01), None
patent: 04-354536 (1992-12-01), None
patent: 05-068855 (1993-03-01), None
patent: 05-103949 (1993-04-01), None
patent: 06-047255 (1994-02-01), None
patent: 08-038906 (1996-02-01), None
patent: 09-038502 (1997-02-01), None
patent: 2000-308831 (2000-11-01), None
Shokubai (Catalyst), vol. 33 (1991), No. 5, pp. 320-327, The Catalysis Society of Japan, no month.

Affiliated with

Also associated with

Rating

Catalyst and method for clarifying exhaust gas does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Catalyst and method for clarifying exhaust gas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Catalyst and method for clarifying exhaust gas will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3904024