JPS5637029A - Reduction of nox in exhaust gas - Google Patents
Reduction of nox in exhaust gasInfo
- Publication number
- JPS5637029A JPS5637029A JP11122979A JP11122979A JPS5637029A JP S5637029 A JPS5637029 A JP S5637029A JP 11122979 A JP11122979 A JP 11122979A JP 11122979 A JP11122979 A JP 11122979A JP S5637029 A JPS5637029 A JP S5637029A
- Authority
- JP
- Japan
- Prior art keywords
- nox
- gas
- exhaust gas
- flow passage
- reduced
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To reduce NOx in the combustion exhaust gas efficiently by adding a oxygen containing hydrocarbon or a precursor substances thereof to the combustion exhaust gas to oxidize a specific amount of NO in the gas to NO2 and, subsequently, denitrating catalitically by NH3.
CONSTITUTION: The oxygen containing hydrocarbon or the precursor substance thereof is added to the combustion gas to oxidize NO contained in said gas to NO2 as well as to convert 1/4W3/4 of NOx to NO2 and, thereafter, by adding NH3 to denitrate catalitically, NOx in the combustion gas is reduced. For example, 0.5W 3mol eq. of CH3OH against NO in the exhaust gas is added from a flow passage 2 and NO is oxidized in a reactor 3. At his time, the oxidation of NO to NO2 is pref. 1/3W2/3. Subsequently, NH3 is introduced from a flow passage 4 and a large amount of NOx is reduced to N2 by the action of a denitrating catalyst such as platinum, palladium, copper or iron in a reduction catalystic reactor 5 and the reduced gas is dischraged from a flow passage 6.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11122979A JPS5637029A (en) | 1979-08-31 | 1979-08-31 | Reduction of nox in exhaust gas |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11122979A JPS5637029A (en) | 1979-08-31 | 1979-08-31 | Reduction of nox in exhaust gas |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5637029A true JPS5637029A (en) | 1981-04-10 |
Family
ID=14555817
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11122979A Pending JPS5637029A (en) | 1979-08-31 | 1979-08-31 | Reduction of nox in exhaust gas |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5637029A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4585631A (en) * | 1984-01-27 | 1986-04-29 | Ruhrgas Aktiengesellschaft | Method for the conversion of nitrogen oxides contained in gaseous products of combustion |
US4971777A (en) * | 1987-11-19 | 1990-11-20 | Krupp Koppers Gmbh | Process for the removal of acid components and nitrogen oxides from the waste gases of industrial furnaces |
US6423283B1 (en) | 1996-09-17 | 2002-07-23 | Hitachi Zosen Corporation | Method for removing NOx |
CN104971605A (en) * | 2015-06-24 | 2015-10-14 | 方耀 | Coal-fired flue gas treatment method |
WO2019048017A1 (en) * | 2017-09-07 | 2019-03-14 | Danmarks Tekniske Universitet | Methods for removing nox from a gas stream containing more than one gaseous compound |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5291776A (en) * | 1976-01-30 | 1977-08-02 | Mitsubishi Heavy Ind Ltd | Treatment of nitrogen oxides in exhaust gas |
JPS5423068A (en) * | 1977-07-22 | 1979-02-21 | Hitachi Ltd | Removing method for nitrogen oxides in exhaust gas |
-
1979
- 1979-08-31 JP JP11122979A patent/JPS5637029A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5291776A (en) * | 1976-01-30 | 1977-08-02 | Mitsubishi Heavy Ind Ltd | Treatment of nitrogen oxides in exhaust gas |
JPS5423068A (en) * | 1977-07-22 | 1979-02-21 | Hitachi Ltd | Removing method for nitrogen oxides in exhaust gas |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4585631A (en) * | 1984-01-27 | 1986-04-29 | Ruhrgas Aktiengesellschaft | Method for the conversion of nitrogen oxides contained in gaseous products of combustion |
US4971777A (en) * | 1987-11-19 | 1990-11-20 | Krupp Koppers Gmbh | Process for the removal of acid components and nitrogen oxides from the waste gases of industrial furnaces |
US6423283B1 (en) | 1996-09-17 | 2002-07-23 | Hitachi Zosen Corporation | Method for removing NOx |
CN104971605A (en) * | 2015-06-24 | 2015-10-14 | 方耀 | Coal-fired flue gas treatment method |
WO2019048017A1 (en) * | 2017-09-07 | 2019-03-14 | Danmarks Tekniske Universitet | Methods for removing nox from a gas stream containing more than one gaseous compound |
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