Pressure and temperature dependence of the gas-phase recombination of hydroxyl radicals.
In: The Journal of Physical Chemistry, Vol. 92 (1988), No. 14, pp. 4184 - 4190
Title in English:
Pressure and temperature dependence of the gas-phase recombination of hydroxyl radicals.
Author:
Zellner, ReinhardUDE
- GND
- 1014420970
- LSF ID
- 11046
- Other
- connected with university
Year of publication:
1988
Language of text:
English
Appears in
Place of publication:
Washington
Publisher:
American Chemical Society (ACS)
in:
Vol. 92 (1988), No. 14, pp. 4184 - 4190
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Abstract:
Rate consts. for the reaction OH + OH + M -> H2O2 + M (M = N2, H2O) were detd. by using flash photolysis of H2O vapor in combination with quant. OH resonance spectrometry. For M = N2 expts. were performed at 253, 298, and 353 K and pressures of 26-1100 mbar. Under these conditions, the reaction is primarily in the low-pressure limit. Both the abs. value of k1,N20 and its temp. variation agree with theor. predictions and extrapolations from high-temp. dissocn. data. A pressure falloff of k1,N2 was obsd. On the basis of a theor. anal. of the falloff behavior, a high-pressure limiting rate coeff. is predicted.