Reduction of nitric oxide in a fluidized bed. Final report
Reduction of nitric oxide (NO) by two kinds of char, coke, carbon monoxide, and methane was investigated in a bed (I.D. 9.6 cm) of glass sand (static bed depth, 10 cm) fluidized by nitrogen containing a small amount of nitric oxide. The bed was heated externally by an electric heater and the effect of char loading on NO reduction was studied over a wide range of temperatures. It was found that the reactivities of different chars and coke depend strongly upon their physical properties (such as surface area and porosity), upon the type of char, and to a lesser extent upon their carbon content. The reduction of NO with carbon monoxide was also investigated in the fluidized bed and the result showed that the stainless steel wall exerted a significant catalytic effect on this reaction. In order to obtain information for design and operation of fluidized-bed combustors, kinetic evaluation of the reaction of NO with Char 1 was performed. Based on the two-phase bubble model with both bubble phase and emulsion phase in plug flow, the data were analyzed to formulate the reaction rate expression. The activation energy and frequency factor were 31,700 cal/mol and 9.66 x 10/sup 8/ 1/sec respectively.
- Research Organization:
- West Virginia Univ., Morgantown (USA). Dept. of Chemical Engineering
- DOE Contract Number:
- AM21-79MC11284
- OSTI ID:
- 6039487
- Report Number(s):
- DOE/MC/11284-1100; ON: DE81030488
- Country of Publication:
- United States
- Language:
- English
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014000 -- Coal
Lignite
& Peat-- Combustion
42 ENGINEERING
421000* -- Engineering-- Combustion Systems
ACTIVATION ENERGY
AIR POLLUTION ABATEMENT
ALKANES
ALLOYS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYTIC EFFECTS
CHALCOGENIDES
CHARS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
COKE
COMBUSTORS
COMPARATIVE EVALUATIONS
CORROSION RESISTANT ALLOYS
ELECTRIC HEATING
ENERGY
FLUIDIZED BED
FLUIDIZED-BED COMBUSTORS
HEATING
HYDROCARBONS
IRON ALLOYS
IRON BASE ALLOYS
KINETICS
METHANE
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
PYROLYSIS PRODUCTS
REACTION KINETICS
REDUCTION
STAINLESS STEELS
STEELS
TEMPERATURE EFFECTS