Reaction of char nitrogen during fluidized bed coal combustion -- influence of nitric oxide and oxygen on nitrous oxide
- Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Chemical Engineering
The conditions that favor the formation of nitrous oxide from char under fluidized bed combustion conditions are shown to be the oxidation of the char to make the nitrogen bound in the heterocyclic rings accessible so that it can react heterogeneously either with oxygen to form NO or with nitric oxide to form N[sub 2]O. This was demonstrated by measurement of the gas composition when a batch of coal particles was introduced into a fluidized sand bed electrically heated to 1023 K. Oxygen and nitric oxide were added to the fluidizing helium gas in varying concentrations. N[sub 2]O was formed in amounts that increased with increasing NO concentration showing the importance of NO for N[sub 2]O formation. The N[sub 2]O concentration, however, fell to zero when the O[sub 2] supply was interrupted underlying the essential role of oxygen in freeing the organically bound nitrogen so that it can react with NO to form N[sub 2]O.
- OSTI ID:
- 5141771
- Journal Information:
- Combustion and Flame; (United States), Journal Name: Combustion and Flame; (United States) Vol. 97:1; ISSN CBFMAO; ISSN 0010-2180
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010800 -- Coal
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014000* -- Coal
Lignite
& Peat-- Combustion
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHARS
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTION KINETICS
ENERGY SOURCES
FLUIDIZED-BED COMBUSTION
FOSSIL FUELS
FUELS
KINETICS
MATERIALS
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
NITROUS OXIDE
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS PRODUCTS
REACTION KINETICS
THERMOCHEMICAL PROCESSES
YIELDS