Atomabsorptionsmessungen zur Kinetik der Reaktion CH4 + O → CH3 + OH im Temperaturbereich 1500 ≤ T ≤ 2250 K

Roth, P.; Just, Th.

doi:10.1002/bbpc.19770810607

Cited by 62 publications

(10 citation statements)

References 13 publications

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“…A requirement for such measurements is the availability of a sufficiently sensitive diagnostic for the reactive species under study. For atomic radicals the ARAS technique allows sensitive detection, frequently with high enough sensitivity to directly determine the rate coefficients of individual reactions with little interference from secondary reactions [1]. For molecular radicals the introduction of narrow linewidth laser absorption detection has allowed considerable progress in the direction of measurements more sensitive to individual reactions [2].…”

Section: Introductionmentioning

confidence: 99%

Sensitive detection of NH2 in shock tube experiments using frequency modulation spectroscopy

Votsmeier

Song

Davidson

et al. 1999

Int. J. Chem. Kinet.

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Frequency modulation detection of NH 2 in shock tube kinetic experiments is demonstrated with sensitivities of 0.5 ppm in a single pass and 0.25 ppm in a double pass configuration 1.3 atm, detection bandwidth 1 MHz, shock tube diameter). This (1500 K, 15 cm corresponds to a minimum detectable absorption of 0.01% and 0.005%, respectively, which represents an improvement of more than a factor of 20 when compared to conventional laser absorption detection.The feasibility of quantitative absolute concentration measurements is demonstrated using CH 3 NH 2 as a precursor for the preparation of known NH 2 concentrations. The uncertainty for absolute concentration measurements is estimated to be Ϯ10% if a suitable precursor for direct shock tube calibration measurements can be used, and Ϯ15% if an alternative calibration scheme based on the detection of the signal generated by a scanning etalon in reflective mode is used.FM detection has been applied to determine the rate coefficient of the thermal decomposition of CH 3 NH 2 :over the temperature range and at pressures near 1.3 atm. The rate coefficient 1530-1975 K was found to be:This is in good agreement with a recent determination using conventional laser absorption detection of the NH 2 radical.

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Section: Introductionmentioning

confidence: 99%

Sensitive detection of NH2 in shock tube experiments using frequency modulation spectroscopy

Votsmeier

Song

Davidson

et al. 1999

Int. J. Chem. Kinet.

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show abstract

“…17). .. to the TST rate expression as derived by Golden (1979) and recommended by Roth and Just (1977). No further theoretical interpretations have been suggested so far.…”

Section: Comparison Between Experiments and Theory For Rate Coefficienmentioning

confidence: 96%

“…This reaction has been assigned rather inconsistent rate-coefficient expressions in studies over the temperature range 400-2000 K. Roth and Just (1977) and favor a preexponential temperature dependence near T Z , while Klemm et at. (1981) favor one near Tl/l (Fig.…”

Section: Comparison Between Experiments and Theory For Rate Coefficienmentioning

confidence: 99%

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Combustion Chemistry

1984

381

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“…4, Three parameters were used to characterize these profiles: t 0 . 5 indicates the time (relative to tm ) that [C0 2 ) = 5X10 15 /cm 3 ; this was considered to be the lowest concentration at which *reliable data could be obtained, t,. 5 3 an .…”

Section: Cproductionmentioning

confidence: 99%