Fundamentals of nitric oxide formation in fossil-fuel combustion. Fourth quarterly progress report, 29 June-28 September 1982

Technical Report · Sun May 01 04:00:00 EDT 1983

OSTI ID:5998180

Houser, T; McCarville, M E

Experiments examining the oxidation of HCN and pyridine were continued using an atmospheric pressure flow system in order to determine the mechanism of NO formation from fuel-nitrogen combustion. In addition, several experiments with cyanogen, as well as a few with N/sub 2/O as fuels were run. The results with cyanogen were significantly different than those with HCN in terms of reactivity and NO/sub x/ yields, thus it does not appear to be representative of fuel nitrogen during combustion. The few experiments with N/sub 2/O gave a preliminary indication that if formed, it will not be a major contributor to NO/sub x/ formation subsequently; less than 15% conversion was observed. A large group of experiments between 575 and 675/sup 0/C with HCN/CO mixtures at low to moderate extents of reaction were run to determine the rate parameters of N/sub 2/O formation. It was evident that N/sub 2/O increased with fraction HCN reacted. The kinetic equation that has described some of the data best at this intermediate stage of evaluation was derived from two first-order sequential reactions. The kinetic evaluation is continuing. A set of experiments with pyridine as the fuel indicated larger NO/sub x/ yields than with benzene/HCN mixtures and the drop in these yields was more gradual with contact time. In addition, determination of HCN yields indicate an inverse relationship between HCN and N/sub 2/O formation. At these conditions NO is not a major product and the relationship between its formation and that of HCN and N/sub 2/O is not clear. These experiments will be extended. Finally, during several of the lower temperature experiments with HCN/CO mixtures, a small but significant amount of white solid was observed to form. Attempts will be made to identify it. 7 tables.

• Research Organization: Western Michigan Univ., Kalamazoo (USA). Dept. of Chemistry
• DOE Contract Number: FG22-81PC40805
• OSTI ID: 5998180
• Report Number(s): DOE/PC/40805-4; ON: DE83013605
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
AROMATICS
AZINES
BENZENE
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHROMATOGRAPHY
COMBUSTION PRODUCTS
CYANIDES
CYANOGEN
DATA
DISPERSIONS
EXPERIMENTAL DATA
GAS CHROMATOGRAPHY
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
HYDROCYANIC ACID
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
KINETICS
MASS SPECTROSCOPY
MIXTURES
NITROGEN COMPOUNDS
NITROGEN OXIDES
NITROUS OXIDE
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PYRIDINE
PYRIDINES
REACTION INTERMEDIATES
REACTION KINETICS
RESEARCH PROGRAMS
SEPARATION PROCESSES
SPECTROSCOPY
YIELDS