A low temperature study of the reactions of atomic chlorine with simple alkanes.

摘要: The kinetics of the reactions atomic chlorine with ethane and propane have been studied in a continuous supersonic flow reactor over range 48 K ≤ T 167 K. Chlorine atoms were produced by microwave discharge upstream Laval nozzle probed vacuum ultraviolet wavelength around 138 nm resonance fluorescence. reaction Cl has found to exhibit positive temperature dependence, rate coefficient decreasing from (4.3 ± 0.6) × 10−11 cm3 molecule−1 s−1 at (2.9 0.3) deviates true Arrhenius behavior below 120 In contrast, for constant value (1.4 0.2) 10−10 same range. expressed uncertainties are combined statistical (a single standard deviation mean) systematic (estimated 10%) uncertainties.