论文信息 - Kinetics of the reaction of HO2 with NO2

Kinetics of the reaction of HO2 with NO2

The reaction of HO2 with NO2 has been studied using laser magnetic resonance detection of HO2 with a discharge‐flow system. The proposed reaction mechanism is HO2+NO2+M k1a→HOONO2+M, and HO2+NO2 k1b→HONO+O2. Measurements were made at 300 K over the pressure range 0.5–3 torr. HO2 concentrations down to 1010 molecules/cm3 were used to eliminate side reactions. The data were analyzed on the basis of the above mechanism and the results are kla(M) = (M=He)10.0±2.5, (M=N2)20.9±5.2,(M=O2) 15.1±3.8, and (M=NO2)66±30 in the units 10−32 cm6/molecule2 s and klb<3×10−15 cm3/molecule⋅s. These results indicate that HOONO2 is the major product of Reaction (1). This conclusion is in agreement with other recent measurements.

C. J. Howard

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