Rate constants for the gas phase reactions of the OH radical with CF sub 3 CF sub 2 CHCl sub 2 (HCFC-225ca) and CF sub 2 ClCF sub 2 CHClF (HCFC-225cb)

Journal Article · Tue Jan 01 04:00:00 EST 1991 · Geophysical Research Letters (American Geophysical Union); (USA)

DOI:https://doi.org/10.1029/90GL02647· OSTI ID:5674950

Zhang, Zhengyu; Liu, Renzhang; Huie, R E; Kurylo, M J ^[1]

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1. National Institute of Standards and Technology, Gaithersburg, MD (USA)

Rate constants have been measured for the gas phase reactions of the hydroxyl radical (OH) with the hydrochlorofluorocarbons CF{sub 3}Cf{sub 2}CHCl{sub 2} (HCFC-225ca) over the temperature range 270 to 400 K and CF{sub 2}ClCF{sub 2}CHClF (HCFC-225cb) over the temperature range 298 to 400 K. The Arrhenius expressions k(225ca) = (1.92 {plus minus} 0.52) {times} 10{sup {minus}12} exp({minus}1290 {plus minus} 90/T) cm{sup 3} molecule {sup {minus}1} s{sup {minus}1} and k (225cb) = (6.75 {plus minus} 3.70) {times} 10{sup {minus}13} exp({minus}1,300 {plus minus} 180/T) cm{sup 3} molecule{sup {minus}1} s{sup {minus}1} were derived from the kinetic data.

• OSTI ID: 5674950
• Journal Information: Geophysical Research Letters (American Geophysical Union); (USA), Journal Name: Geophysical Research Letters (American Geophysical Union); (USA) Vol. 18:1; ISSN GPRLA; ISSN 0094-8276
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ATMOSPHERIC CHEMISTRY
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
CHLORINATED ALIPHATIC HYDROCARBONS
CLIMATES
EQUATIONS
FLUIDS
FLUORINATED ALIPHATIC HYDROCARBONS
GASES
HALOGENATED ALIPHATIC HYDROCARBONS
HOLES
HYDROXYL RADICALS
KINETIC EQUATIONS
KINETICS
LAYERS
MATERIAL SUBSTITUTION
MEDIUM TEMPERATURE
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OZONE LAYER
RADICALS
REACTION KINETICS
VARIATIONS