Kinetic studies of Cl-atom reactions with selected aromatic compounds using the photochemical reactor-FTIR spectroscopy technique
✍ Scribed by Jichun Shi; Mary Jo Bernhard
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 143 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0538-8066
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✦ Synopsis
Relative rate constant measurements have been carried out on the Cl-atom reactions with benzene, chlorobenzene, toluene, xylene, and styrene in 740 torr of air at room temperature (295 K), using the photochemical reactor-FTIR spectroscopy technique. The Cl atoms were generated by the UV photolysis of Cl 2 , and the reference compounds were CHF 2 Cl for benzene and chlorobenzene and isobutane for toluene, xylene, and styrene. Using the absolute rate constants for these two reference compounds reported in the literature, the following kinetic data were obtained for the study compounds (in units of cm 3 s Ϫ1 ).
Benzene
(1.3 Ϯ 0.3) ϫ 10 Ϫ15 Chlorobenzene (9.8 Ϯ 2.4) ϫ 10 Ϫ16 Toluene (5.9 Ϯ 0.5)
The quoted error bars are for Ϯ 2. The present kinetic results are compared with available literature data to update and expand the kinetics database for Cl-atom reactions of organic compounds. The results are also analyzed to provide insights into the reaction mechanism for the Cl-atom initiated oxidation of benzene under atmospheric conditions.