Homogeneous nitrous oxide formation and destruction under combustion conditions
- Technical Univ. of Denmark, Lyngby (Denmark). Dept. of Chemical Engineering
N[sub 2]O decomposition and formation during the oxidation of NH[sub 3] and HCN were studied in a quartz flow reactor in the presence of CO, NO and other gases. The emphasis is on the influence of CO and NO. In addition, the homogeneous nitrogen chemistry of fluidized bed combustion and the selective noncatalytic reduction of NO (SNR) are discussed. The rate of N[sub 2]O decomposition in N[sub 2] agrees with a first-order rate expression. The presence of CO or H[sub 2] increases the decomposition rate regardless of the additional presence of O[sub 2]. For the formation of N[sub 2]O, HCN oxidation is more efficient than NH[sub 3] oxidation. The presence of NO increases the amount of N[sub 2]O formed during the oxidation of HCN or NH[sub 3]. CO moves the N[sub 2]O formation toward lower temperatures. H[sub 2]O increases the reaction rate where few components are present, whereas H[sub 2]O has little influence in the presence of large amounts of a combustible component such as CO. There are indications that NO is a necessary intermediate for any significant formation of N[sub 2]O during the oxidation of NH[sub 3] and HCN. NO reduction is obtained when NO is initially present during oxidation of both NH[sub 3] and HCN. These results are comparable to the respective SNR results with reductant ammonia and urea.
- OSTI ID:
- 5908047
- Journal Information:
- AIChE Journal (American Institute of Chemical Engineers); (United States), Journal Name: AIChE Journal (American Institute of Chemical Engineers); (United States) Vol. 39:8; ISSN 0001-1541; ISSN AICEAC
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010800* -- Coal
Lignite
& Peat-- Waste Management
02 PETROLEUM
020800 -- Petroleum-- Waste Management
03 NATURAL GAS
030700 -- Natural Gas-- Waste Management
AMMONIA
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTION KINETICS
COMBUSTORS
CYANIDES
DECOMPOSITION
ENERGY SOURCES
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
GREENHOUSE GASES
HYDRIDES
HYDROCYANIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
KINETICS
MATERIALS
NATURAL GAS
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN OXIDES
NITROUS OXIDE
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
POLLUTANTS
REACTION INTERMEDIATES
REACTION KINETICS
REDUCTION
THERMOCHEMICAL PROCESSES
YIELDS