Comparisons of the structure of stoichiometric CH sub 4 -N sub 2 O-Ar and CH sub 4 O sub 2 -Ar flames by molecular beam sampling and mass spectrometric analysis

Journal Article · Tue Sep 01 04:00:00 EDT 1992 · Combustion and Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(92)90086-5· OSTI ID:7176295

Vandooren, J; Branch, M C; Van Tiggelen, P J ^[1]

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1. Lab. de Physico-Chimie de la Combustion, Univ. Catholique de Louvain, B-1348 Louvain-La-Neuve (BE)

In this paper, measurements are reported of the profiles of composition and temperature in laminar premixed flat flames of CH{sub 4}-N{sub 2}O-Ar and CH{sub 4}-O{sub 2}-Ar. Measurements were made in near stoichiometric mixtures at 30 torr by molecular beam sampling and mass spectrometric sample analysis. All major stable species and many important unstable species were measured by this technique, many species being identified in the flame with N{sub 2}O as oxidizer for the first time. Calibration of the concentration profiles was accomplished by the use of calibration gases for stable species and by comparison of the mass spectrometer signal in the well-characterized CH{sub 4}0O{sub 2}-Ar flame with signals in the CH{sub 4}-N{sub 2}O-Ar flame and by partial equilibrium for the hydrogen-oxygen system. The measurements have identified the presence of NCO, HCN, and HNCO as reaction intermediates and the importance of these species in the reaction mechanism is discussed.

• OSTI ID: 7176295
• Journal Information: Combustion and Flame; (United States), Journal Name: Combustion and Flame; (United States) Vol. 90:3; ISSN 0010-2180; ISSN CBFMA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
440800 -- Miscellaneous Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
ALKANES
ARGON
BEAMS
CALIBRATION
CHALCOGENIDES
CHEMICAL COMPOSITION
COMBUSTION PRODUCTS
COMPARATIVE EVALUATIONS
DISPERSIONS
ELEMENTS
EVALUATION
FLAMES
FLUID FLOW
FLUIDS
GASES
HYDROCARBONS
LAMINAR FLOW
LOW PRESSURE
MASS SPECTROSCOPY
METHANE
MIXING
MIXTURES
MOLECULAR BEAMS
NITROGEN COMPOUNDS
NITROGEN OXIDES
NITROUS OXIDE
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXIDIZERS
OXYGEN
OXYGEN COMPOUNDS
RARE GASES
SAMPLING
SPECTROSCOPY
STOICHIOMETRY
TEMPERATURE MEASUREMENT