Compound oxide catalyst and method for reducing nitric oxides under charge lean burn condition
Title:
Compound oxide catalyst and method for reducing nitric oxides under charge lean burn condition
Application Number:
200410009674
Application Date:
2004/10/15
Announcement Date:
2005/06/01
Pub. Date:
Publication Number:
1621149
Announcement Number:
Grant Date:
Granted Pub. Date:
ApplicationType:
Invention
State/Country:
11[China|beijing]
IPC:
B01J 23/14, B01J 23/825, B01D 53/56, B01D 53/86, B01D 53/94
Applicant(s):
Tsinghua University
Inventor(s):
Li Junhua, Hao Jiming, Fu Lixin
Key Words:
Compound oxide catalyst, reducing method, nitric oxides, charge lean burn condition
Abstract:
The present invention belongs to the field of atmosphere pollution controlling technology in environment protection. The present invention provides composite oxide catalyst comprising aluminan as carrier, indium oxide as main active component and tin oxide or cobalt oxide as synergistic active component, and prepared in one-step sol-gel process. The nitroxide reducing method includes loading the catalyst in fixed bed reactor; and reacting at 200-800 deg.c with propylene or octane as reductant and under controlled total waste gas and reductant flow rate, the molar ratio be total carbon atom and nitrogen atom and space velocity. The present invention realizes the effective catalytic reduction of nitroxide in rare combustion condition, raises NOx converting efficiency, raises the catalyst activity obviously and reaches NOx purifying efficiency up to 50-95 % at 350-550 deg.c.
Claim:
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PCT:
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2008-4-17
  Selected patents owned by Tsinghua University filed in 2005 are loaded.
2008-3-31
  Selected patents owned by Tsinghua University filed in 2006 and 2007 are load.







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