Concentration-time profiles have been measured for hydroxyl radicals generated by the shock-tube decomposition of hydrogen peroxide in the presence of a variety of additives. At temperatures close to 1300"K, the rate constants for the reaction OH + R H + R + HzO arr found to be in the ratio 0.18:0.
LIF detection of the CF3O radical and kinetics of its reactions with CH4 and C2H6
โ Scribed by H. Saathoff; R. Zellner
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 469 KB
- Volume
- 206
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
โฆ Synopsis
Fluorescence excitation and dispersed fluorescence spectra of the jz 'E-A 2A, transition of the trifluoromethoxy radical have been measured using laser excitation in the range 336-358 in. The spectra are dominated by the features of the CO stretching and the OCF deformation mode. The LIF technique has been used to study the kinetics of the reactions of CFsO (2 *E) radicals with CH, (5) and C,Hs (6). Rate coefficients of s= (2.2k0.2) X lo-i4 and h= (1.2t0.2) X 10-12cm3/s at 298 K have been determined
๐ SIMILAR VOLUMES
CF 3 CF 2 CH 2 OH is a new chlorofluorocarbon (CFC) alternative. However, there are few data about its atmospheric fate. The kinetics of its atmospheric oxidation, the OH radical reaction of CF 3 CF 2 CH 2 OH, has been investigated in a 2-liter Pyrex reactor in the temperature range of 298 ฯณ 356 K u
The reaction of CF3 radicals with Ha0 (D20) has been studied over the range of 533-723 K using the photolysis and the pyrolysis of CFJ as the free radical source. Arrhenius pa- rameters for the reactions where X = H or D, relative to CF:j radical recombination are given by log kHlkf'2 = (5.12 f 0.1
The rate constants for the reactions CF302 + NO ~ CF30+NO 2 (1) and CF30+NO~ products (2) have been measured at room temperature using a fast flow reactor associated with a monitoring of CF30 radicals by laser induced fluorescence (LIF); for the measurement of k~, CF30 radicals are prepared by the d
A pulse radiolysis technique has been used to measure a rate constant of (6.6f 1.3) x lo-r2 cm3 molecule-' s-i for the association reaction between CF3C(0)02 radicals and NO2 at 295 K and one atmosphere total pressure of SF, diluent. A FAIR/ smog chamber system was used to study the thermal decompos