NO/char reactions at pulverized-coal flame conditions
Technical Report
·
OSTI ID:5950814
The paper discusses nitrogen oxide (NO)/char reactions at pulverized-coal flame conditions. The effective rate of the NO/char reaction, measured over the temperature range 1250 to 1750 K, was found to be retarded by water vapor and enhanced by carbon monoxide (CO) by amounts that decrease with increasing temperature. This is consistent with a hypotehsis that the NO/carbon (C) reaction is retarded by the formation of a chemisorbed layer that can be removed by reaction with CO. Support for the hypothesis is provided by transient experiments which show that, at low temperatures, NO reacts with C to form nitrogen (N2) and a chemisorbed oxygen (O2) layer, and that the chemisorbed O2 decomposes at higher temperatures to form CO or reacts with CO to form carbon dioxide (CO2).
- Research Organization:
- Massachusetts Inst. of Tech., Cambridge, MA (United States)
- OSTI ID:
- 5950814
- Report Number(s):
- PB-92-121417/XAB; CNN: EPA-R-805552
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
010800 -- Coal
Lignite
& Peat-- Waste Management
014000* -- Coal
Lignite
& Peat-- Combustion
AIR POLLUTION
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHARS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISORPTION
COAL
COMBUSTION KINETICS
ELEMENTS
ENERGY SOURCES
FLAMES
FLUIDS
FOSSIL FUELS
FUELS
GASES
KINETICS
MATERIALS
NITROGEN
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
POLLUTION
PULVERIZED FUELS
PYROLYSIS PRODUCTS
REACTION KINETICS
SEPARATION PROCESSES
SORPTION
SYNTHESIS
TEMPERATURE RANGE
TEMPERATURE RANGE 1000-4000 K
VAPORS
WATER VAPOR
010800 -- Coal
Lignite
& Peat-- Waste Management
014000* -- Coal
Lignite
& Peat-- Combustion
AIR POLLUTION
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHARS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISORPTION
COAL
COMBUSTION KINETICS
ELEMENTS
ENERGY SOURCES
FLAMES
FLUIDS
FOSSIL FUELS
FUELS
GASES
KINETICS
MATERIALS
NITROGEN
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
POLLUTION
PULVERIZED FUELS
PYROLYSIS PRODUCTS
REACTION KINETICS
SEPARATION PROCESSES
SORPTION
SYNTHESIS
TEMPERATURE RANGE
TEMPERATURE RANGE 1000-4000 K
VAPORS
WATER VAPOR