Title:
DENITRIFICATION CATALYST, HONEYCOMB STRUCTURE TYPE DENITRIFICATION CATALYST, AND METHOD OF DENITRIFICATION WITH THE SAME
Document Type and Number:
WIPO Patent Application WO/2007/074599
Kind Code:
A1
Abstract:
A denitrification catalyst and a honeycomb structure type denitrification
catalyst which are used for efficiently removing nitrogen oxides through reduction
from exhaust gases discharged from, e.g., boilers and internal combustion engines
such as a gasoline engine and diesel engine; and a method of denitrification using
either of these catalysts. The denitrification catalyst is for use in reducing
nitrogen oxides contained in an exhaust gas with an ammonia source and comprises
zeolite as the main ingredient, and is characterized in that not only iron element
and cerium element but tin element and/or gallium element has been deposited
on the zeolite. The honeycomb structure type denitrification catalyst comprises
the denitrification catalyst and a honeycomb structure support whose surface
has been covered therewith. The denitrification method is characterized by
adding ammonia or urea as a reducing agent to an exhaust gas containing nitrogen
oxides and bringing the mixture into contact with the denitrification catalyst
or honeycomb structure type denitrification catalyst at a temperature in the
range of 170-550°C.
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Inventors:
ANDO RYUJI (JP)
KANNO YASUHARU (JP)
NAGATA MAKOTO (JP)
KANNO YASUHARU (JP)
NAGATA MAKOTO (JP)
Application Number:
PCT/JP2006/323655
Publication Date:
July 05, 2007
Filing Date:
November 28, 2006
Export Citation:
Assignee:
N E CHEMCAT CORP (JP)
ANDO RYUJI (JP)
KANNO YASUHARU (JP)
NAGATA MAKOTO (JP)
ANDO RYUJI (JP)
KANNO YASUHARU (JP)
NAGATA MAKOTO (JP)
International Classes:
B01D53/94; B01J29/76; F01N3/08; F01N3/10
Domestic Patent References:
| WO2000072965A1 | 2000-12-07 |
Foreign References:
| JP2005502451A | 2005-01-27 | |||
| JP2004536756A | 2004-12-09 | |||
| JPH05212288A | 1993-08-24 | |||
| JPH04310240A | 1992-11-02 | |||
| JPH03270732A | 1991-12-02 |
Other References:
See also references of EP 1967264A4
Attorney, Agent or Firm:
KAWABI, Kenji (6th floor 9-7, Higashi-ikebukuro 3-chom, Toshima-ku Tokyo 13, JP)
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