NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Rate constants for the reactions of OH with HFC-134a (CF3CH2F) and HFC-134 (CHF2CHF2)Measurements of rate constants for HFC-134 (CF2HCF2H) relative to CH3CCl3, HFC-125, and HFC-134a are reported. The measurements were made in a slow-flow, temperature controlled photochemical reactor, and were based on relative rates of disappearance of the parent compounds as measured by FTIR spectroscopy. Hydroxyl radicals were generated by 254-nm photolysis of O3 in the presence of water vapor. NASA/JPL rate constants for the reference compounds are used to derive temperature-dependent rate constants of both compounds. Rate constants obtained from the different reference compounds are in excellent agreement. The presently recommended rate constant for HFC-134a is about 25 percent too high.
Document ID
19930067216
Document Type
Reprint (Version printed in journal)
Authors
Demore, W. B. (JPL Pasadena, CA, United States)
Date Acquired
August 16, 2013
Publication Date
July 9, 1993
Publication Information
Publication: Geophysical Research Letters
Volume: 20
Issue: 13
ISSN: 0094-8276
Subject Category
ENVIRONMENT POLLUTION
Distribution Limits
Public
Copyright
Other