✦ LIBER ✦

A study of O(1D) reactions with CFC substitutes

✍ Scribed by R. Warren; T. Gierczak; A.R. Ravishankara

Publisher: Elsevier Science
Year: 1991
Tongue: English
Weight: 565 KB
Volume: 183
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(91)90402-u

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✦ Synopsis

The rate coefficients for the removal of O( 'D) by reaction with the following nine CFC substitutes have been measured using time-resolved vacuum UV atomic resonance fluorescence detection of O('P): CHF,Cl (HCFC 22), CF,CHC& (HCFC 123), CF,CHClF (HCFC 124), CF,CHF,(HFC 125), CFICHZCl (HCFC 133a), CF,CH2F (HFC 134a), CH,CFClz (HCFC 14lb), CH,CF,Cl (HCFC 142b), and CHjCHF2 (HFC 152a). The branching ratios for the quenching of O( 'D) toO('P) by the above molecules were determined by measuring the O("P) yields in the presence of the HCFC/HFCs relative to that in the presence of N,. By difference, the rate coeflicients for the chemical reaction of 0( 'D) with the HCFC/HFCs were calculated.

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