Parametric studies of catalysts for NOx control from stationary power plants. Final report, Mar 1975--Sep 1976
The report gives results of a study of vanadia-alumina and iron oxide-chromium oxide-alumina catalysts for the reduction of NO with NH/sub 3/ in simulated flue gas. Optimum catalyst compositions were 15% V/sub 2/O/sub 5/ on Al/sub 2/O/sub 3/ and 10% Fe-Cr oxides on Al/sub 2/O/sub 3/ with an Fe/Cr ratio of 1/9, respectively. Both catalysts were selective for the reduction of NO to N2 in the presence of O/sub 2/. Both were shown to be sulfur-resistant during total periods of operation of 648 h for V/sub 2/O/sub 5/ and 1052 h for Fe-Cr in the presence of SOx. Typical conversion levels for V/sub 2/O/sub 5/ and Fe-Cr catalysts operating at 400/sup 0/C in simulated flue gas containing 1000 ppm NO, 1000 ppm NH/sub 3/, in the presence of SOx, were about 90 and 80%, respectively, at 20,000 per hour space velocity. Rate expressions for both catalysts have been developed for design use. A tabulation of recent publications in the field of NOx catalysis (particularly selective reduction with NH/sub 3/) is presented.
- Research Organization:
- California Univ., Los Angeles (USA)
- OSTI ID:
- 7308855
- Report Number(s):
- PB-261289
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
200202* -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
AIR POLLUTION CONTROL
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AMMONIA
CATALYSTS
CHALCOGENIDES
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
ELEMENTS
FLUE GAS
FOSSIL-FUEL POWER PLANTS
GASEOUS WASTES
HYDRIDES
HYDROGEN COMPOUNDS
IRON COMPOUNDS
IRON OXIDES
METALS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POWER PLANTS
THERMAL POWER PLANTS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VANADIUM
WASTES