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Reduction and adsorption kinetics of nitric oxide on cobalt perovskite catalysts

Journal Article · · Ind. Eng. Chem., Prod. Res. Dev.; (United States)
DOI:https://doi.org/10.1021/i360054a601· OSTI ID:5333422
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The catalytic activities of cobalt perovskites and various cobalt oxides for the reduction of nitric oxide with carbon monoxide were studied under plug flow reactor conditions. Cobalt tetroxide showed the greatest catalytic activity after pretreatment with CO, and lanthanum strontium cobalt trioxide showed the least catalytic activity. The perovskite lanthanum cobalt trioxide displayed an intermediate activity between the two extremes. The reaction rates for all cobalt oxide and perovskite catalysts tested were zero order in CO and fractional order in NO. Nitric oxide was converted principally to nitrogen between 380 and 500/sup 0/C; at lower temperatures more nitrous oxide was formed. The adsorption rate for a barium-dope perovskite which was a better catalyst for the NO-CO reaction that was LaCoO/sub 3/ exceeded the rate for the latter, suggesting that the NO-CO reaction rate was influenced by the chemisorption rate of NO on the respective catalysts.

OSTI ID:
5333422
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

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADSORPTION
ALKALINE EARTH METAL COMPOUNDS
ALKALINE EARTH METALS
BARIUM
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
COBALT
CRYOGENIC FLUIDS
ELEMENTS
FLUIDS
LANTHANUM
METALS
MINERALS
NITRIC OXIDE
NITROGEN
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PEROVSKITE
PEROVSKITES
RARE EARTHS
REDUCTION
SEPARATION PROCESSES
SORPTION
STRONTIUM
TEMPERATURE EFFECTS
TIME MEASUREMENT
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS