Claims
- 1. A method of preparing nitric oxide comprising contacting ammonia and a free oxygen containing gas in vapor phase in the presence of a catalyst structure for the oxidation of ammonia to produce nitric oxide comprising a substrate of a reticulated ceramic foam or a reticulated metal foam having coated substantially uniformly thereover from 1 to 70 weight % cobalt, a noble metal or mixtures thereof.
- 2. The method according to claim 1 wherein from about 2 to 20 weight % of said noble metal is coated on said substrate.
- 3. The method according to claim 2 wherein in said noble metal is Pt, Pd, Rh, Ru, Os or mixtures thereof.
- 4. The method according to claim 1 wherein said substrate is coated substantially continuously.
- 5. The method according to claim 3 wherein said metal coating on said substrate is electrically conductive.
- 6. The method according to claim 1 wherein said coating comprises platinum.
- 7. A method of preparing nitric oxide comprising contacting ammonia and a free oxygen containing gas in vapor phase in the presence of a catalyst structure for the oxidation of ammonia to produce nitric oxide comprising a substrate of a reticulated ceramic foam or a reticulated metal foam having coated substantially uniformly thereover from 15 to 30 weight % cobalt.
- 8. A method of preparing nitric acid comprising:
- (a) contacting ammonia and a free oxygen containing gas in vapor phase in the presence of a catalyst structure for the oxidation of ammonia to produce nitric oxide comprising a substrate of reticulated ceramic foam or reticulated metal foam having coated substantially continuously thereover from 1 to 70 weight % Co, Pt, Pd, Rh or mixtures thereof to produce a vaporous reaction product containing nitric oxide and
- (b) contacting said vaporous reaction product with water.
- 9. The method according to claim 8 wherein said coating comprises from about 2 to 20 weight % Pt, Pd, Rh or mixtures thereof.
- 10. The method according to claim 8 wherein said metal coating on said substrate is electrically conductive.
- 11. The method according to claim 8 wherein said coating comprises platinum.
- 12. A method of preparing nitric acid comprising:
- (a) contacting ammonia and a free oxygen containing gas in vapor phase in the presence of a catalyst structure for the oxidation of ammonia to produce nitric oxide comprising a substrate of reticulated ceramic foam or reticulated metal foam having coated substantially continuously thereover from 15 to 30 weight % cobalt to produce a vaporous reaction product containing nitric oxide and
- (b) contacting said vaporous reaction product with water.
Parent Case Info
This is a division of application Ser. No. 07/881,073, filed May 11, 1992, now U.S. Pat. No. 5,217,939.
US Referenced Citations (19)
Non-Patent Literature Citations (1)
Entry |
Farrauto, Robert J., et al., "Ammonia Oxidation Catalysts with Enhanced Activity", Ind. Eng. Chem. Res., vol. 29, No. 7, 1990, pp. 1125-1129. |
Continuations (1)
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Number |
Date |
Country |
Parent |
881073 |
May 1992 |
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