Title:
CATALYST FOR DECOMPOSITION OF NITROUS OXIDE, METHOD FOR PRODUCING CATALYST FOR DECOMPOSITION OF NITROUS OXIDE, AND METHOD FOR PROCESSING NITROUS OXIDE-CONTAINING GAS
Document Type and Number:
WIPO Patent Application WO/2013/047484
Kind Code:
A1
Abstract:
Provided is a catalyst for decomposition of nitrous oxide, which is highly active at low temperatures and is capable of efficiently decomposing and removing nitrous oxide without being affected by nitrogen oxide or carbon dioxide even in cases where the nitrogen oxide or the carbon dioxide is contained in a gas to be processed. A catalyst for decomposition of nitrous oxide of the present invention contains a cobalt oxide as a catalyst component A and a compound of at least one metal element as a catalyst component B. This catalyst for decomposition of nitrous oxide is characterized in that: the atomic ratio of the catalyst component B to the catalyst component A is from 0.0005 to 0.15; and the melting point of an oxide of the metal element is within the range from 200˚C to 1,000˚C and/or the ionic radius of the metal element of the catalyst component B is within the range from 0.90Å to 1.88Å.
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Inventors:
KITAGUCHI SHINYA (JP)
NISHINA AKIRA (JP)
NISHINA AKIRA (JP)
Application Number:
PCT/JP2012/074492
Publication Date:
April 04, 2013
Filing Date:
September 25, 2012
Export Citation:
Assignee:
NIPPON CATALYTIC CHEM IND (JP)
International Classes:
B01J23/89; B01D53/94; B01J23/78; B01J23/825; B01J23/835; B01J23/84; B01J23/889
Foreign References:
| JPH06246135A | 1994-09-06 | |||
| JP2007054714A | 2007-03-08 |
Other References:
X. LI ET AL.: "Catalytic Decomposition of N20 over Co-M (M=La, Ce, Fe, Mn, Cu, Cr) Composite Oxide Catalysts", WULI HUAXUE XUEBAO, vol. 23, no. 5, 2007, pages 664 - 670
B. M. ABU-ZIED ET AL.: "Nitrous Oxide Decomposition Over MC03-Co304 (M=Ca, Sr, Ba) Catalysts", CATALYSIS LETTERS, vol. 132, no. 3-4, 23 September 2009 (2009-09-23), KLUWER ACADEMIC PUBLISHERS-PLENUM PUBLISHERS, NE, pages 299 - 310, XP019746871
B. M. ABU-ZIED ET AL.: "Nitrous Oxide Decomposition Over MC03-Co304 (M=Ca, Sr, Ba) Catalysts", CATALYSIS LETTERS, vol. 132, no. 3-4, 23 September 2009 (2009-09-23), KLUWER ACADEMIC PUBLISHERS-PLENUM PUBLISHERS, NE, pages 299 - 310, XP019746871
Attorney, Agent or Firm:
UEKI, Kyuichi et al. (JP)
Hisakazu Ueki (JP)
Hisakazu Ueki (JP)
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