Reduction of nitric oxide with ammonia on noble metal catalysts

Journal Article · Sun Jun 01 04:00:00 EDT 1975 · Ind. Eng. Chem., Prod. Res. Dev.; (United States)

DOI:https://doi.org/10.1021/i360054a600· OSTI ID:6624933

Bauerle, G L; Wu, S C; Nobe, K

The reduction of nitric oxide with ammonia on alumina-supported platinum, palladium, ruthenium, and rhodium catalysts was studied in flow reactors at temperatures between 120 and 400/sup 0/C. The presence of oxygen in the gas mixture enhanced the reduction of NO on Pt and Pd below about 230/sup 0/C, whereas O/sub 2/ inhibited NO reduction on Ru and Rh. Considerable nitrous oxide was produced on both Pt and Pd in the presence of O/sub 2/. Using a simulated power plant stack gas containing 14% carbon dioxide, 5% water, 3% O/sub 2/, and 250 to 1000 ppM NO, the conversion of NO was a function of the NH/sub 3//NO inlet ratio from 0.5 to 2.3. The presence of O/sub 2/ also accelerated the decomposition of NO on Pt in the simulated flue gas. Maximum decomposition occurred with 2% O/sub 2/ present in the flue gas at a temperature of 300/sup 0/C.

• OSTI ID: 6624933
• Journal Information: Ind. Eng. Chem., Prod. Res. Dev.; (United States), Journal Name: Ind. Eng. Chem., Prod. Res. Dev.; (United States) Vol. 14:2; ISSN IEPRA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
424000 -- Engineering-- Pollution Control Equipment-- (1980-1989)
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION CONTROL
AMMONIA
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
CRYOGENIC FLUIDS
ELEMENTS
FLUE GAS
FLUIDS
GASEOUS WASTES
HYDRIDES
HYDROGEN COMPOUNDS
METALS
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN OXIDES
NITROUS OXIDE
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PALLADIUM
PLATINUM
PLATINUM METALS
POLLUTION CONTROL
REDUCTION
REFRACTORY METALS
RHODIUM
RUTHENIUM
TRANSITION ELEMENTS
WASTES