Claims
- 1. A process for treating a waste gas, which consists essentially of the steps of contacting a nitrogen oxide-containing waste gas with activated carbon as the sole catalyst in the presence of gaseous ammonia and oxygen at a temperature between about 150.degree. C. and about 250.degree. C. to convert the nitrogen oxide to nitrogen, whereby the nitrogen oxide is removed from said waste gas, said gaseous ammonia being present in amounts not less than 2/3 mole per mole, in terms of NO, of the nitrogen oxide contained in the waste gas and wherein the oxygen is present in an amount of not less than 0.5 mole per mole, in terms of NO, of the nitrogen oxide contained in the waste gas.
- 2. The process of claim 1, wherein the activated carbon is oxidized activated carbon.
- 3. The process of claim 2, wherein the oxidized activated carbon is one prepared by oxidizing an activated carbon with an oxidizing solution selected from the group consisting of H.sub.2 O.sub.2, HNO.sub.3, K.sub.2 MnO.sub.4 or NaClO.sub.3.
- 4. The process of claim 2, wherein the oxidized activated carbon is one prepared by oxidizing an activated carbon with an oxidizing gas selected from the group consisting of O.sub.2, O.sub.3, SO.sub.3, SO.sub.2, N.sub.3 O, NO or NO.sub.2 gas.
Priority Claims (3)
Number |
Date |
Country |
Kind |
48-78980 |
Jul 1973 |
JPX |
|
48-107170 |
Sep 1973 |
JPX |
|
48-143174 |
Dec 1973 |
JPX |
|
CROSS-REFERENCE TO RELATED APPLICATIONS
The present application is a continuation of application Ser. No. 487,801, filed July 11, 1974.
US Referenced Citations (7)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1504331 |
Oct 1967 |
FRX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
487801 |
Jul 1974 |
|