Title:
CATALYST FOR EXHAUST GAS TREATMENT CAPABLE OF CARRYING OUT REDUCTION TREATMENT OF SO3, METHOD FOR PRODUCTION THEREOF, AND METHOD FOR TREATING EXHAUST GAS USING THE CATALYST
Document Type and Number:
WIPO Patent Application WO/2006/114831
Kind Code:
A1
Abstract:
Provided are a catalyst for an exhaust gas treatment capable of carrying out a reduction treatment of SO3 which can efficiently decrease SO3 being co-present in an exhaust combustion gas and being a starting material for an S-containing substance, such as an acidic ammonium sulfate, causing the reduction of the performance capability of a catalyst and the corrosion of a device provided downstream from the catalyst and which inhibits the formation of SO3 in the catalyst itself; a method for producing the catalyst; and a method for treating an exhaust gas using the above catalyst. A catalyst for treating an exhaust combustion gas containing nitrogen oxides, wherein 50 wt % or more of Ru and/or Ir being carried by a base material is contained in a region having a depth from the surface of the base material of 150 µm or less. The above catalyst can be produced by a method which comprises immersing the base material into a metal colloid solution of Ru and/or Ir to be carried or an aqueous solution containing at least one of the compounds of Ru and/or Ir to be carried.
Inventors:
NOCHI KATSUMI (JP)
YONEMURA MASANAO (JP)
IIDA KOZO (JP)
OBAYASHI YOSHIAKI (JP)
NOJIMA SHIGERU (JP)
ONISHI TOSHIYUKI (JP)
YONEMURA MASANAO (JP)
IIDA KOZO (JP)
OBAYASHI YOSHIAKI (JP)
NOJIMA SHIGERU (JP)
ONISHI TOSHIYUKI (JP)
Application Number:
PCT/JP2005/006781
Publication Date:
November 02, 2006
Filing Date:
April 06, 2005
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD (JP)
NOCHI KATSUMI (JP)
YONEMURA MASANAO (JP)
IIDA KOZO (JP)
OBAYASHI YOSHIAKI (JP)
NOJIMA SHIGERU (JP)
ONISHI TOSHIYUKI (JP)
NOCHI KATSUMI (JP)
YONEMURA MASANAO (JP)
IIDA KOZO (JP)
OBAYASHI YOSHIAKI (JP)
NOJIMA SHIGERU (JP)
ONISHI TOSHIYUKI (JP)
International Classes:
B01J23/46; B01D53/86; B01J23/652; B01J37/02
Foreign References:
| JPH10249163A | 1998-09-22 | |||
| JPH11267459A | 1999-10-05 | |||
| JPS4625369B1 | ||||
| JPS63243039A | 1988-10-07 | |||
| JPS58183946A | 1983-10-27 | |||
| JP2001017861A | 2001-01-23 |
Attorney, Agent or Firm:
Okuyama, Shoichi (Akasaka NOA Bldg. 2-12, Akasaka 3-chom, Minato-ku Tokyo, JP)
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