Rate constants for the reactions of OH with CH{sub 3}CFCl{sub 2} (HCFC-141b), CH{sub 3}CF{sub 2}Cl (HCFC-142b), and CH{sub 2}FCF{sub 3} (HFC-134a)
- National Institute of Standards & Technology, Gaithersburg, MD (United States)
The rate constants for the reaction of OH with CH{sub 3}CFCl{sub 2} (HCFC-141b) over the temperature range 250-297 K were remeasured with improved detection sensitivity as a function of flash energy and concentration of OH radical precursor (H{sub 2}O). The rate constants were reduced at the lower OH concentrations employed, suggesting complications due to secondary reactions. The new values disagree with the low-temperature values reported earlier but agree with the values extrapolated from the higher temperature results (T> 298 K). In contrast, rate constants for CH{sub 3}CF{sub 2}Cl(HCFC-142b) and CH{sub 2}FCF{sub 3} (HFC-134a), remeasured at the lower flash energy at 270 K, were found to agree with those reported earlier at higher flash energy. 7 refs., 1 fig., 1 tab.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 554983
- Journal Information:
- Journal of Physical Chemistry, Vol. 96, Issue 4; Other Information: PBD: 20 Feb 1992
- Country of Publication:
- United States
- Language:
- English
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