Kinetics of the reactions of NO/sub 3/ with OH and HO/sub 2/

Journal Article · Thu Apr 21 04:00:00 EDT 1988 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100319a029· OSTI ID:7005275

Mellouki, A; Le Bras, G; Poulet, G

The kinetics of the title reactions have been studied by using the discharge flow method at 298 K. NO/sub 3/ was used in excess over OH and HO/sub 2/ and was titrated with NO or 2,3-dimethyl-2-butene. Since OH was found to be produced in the reaction of HO/sub 2/ with NO/sub 3/, the OH and HO/sub 2/ decays were analyzed by computer simulations to obtain the rate constants for the reactions OH + NO/sub 3/ ..-->.. HO/sub 2/ + NO/sub 2/ (1), HO/sub 2/ + NO/sub 3/ ..-->.. OH + NO/sub 2/ + O/sub 2/ (2a), and HO/sub 2/ + NO/sub 3/ ..-->.. HNO/sub 3/ + O/sub 2/ (2b). The results are k/sub 1/ = (2.6 +- 0.6) x 10/sup -11/ cm/sup 3/ molecule/sup -1/ s/sup -1/, k/sub 2a/ = (3.6 +- 0.9) x 10/sup -12/ cm/sup 3/ molecule/sup -1/ s/sup -1/, and k/sub 2b/ = (9.2 +- 4.8) x 10/sup -13/ cm/sup 3/ molecule/sup -1/ s/sup -1/. The data for reaction 2 are discussed in relation with the HNO/sub 3/ nighttime production in the atmospheric gas phase.

• Research Organization: C.N.R.S., Orleans (France)
• OSTI ID: 7005275
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 92:8; ISSN JPCHA
• Country of Publication: United States
• Language: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
500100 -- Environment
Atmospheric-- Basic Studies-- (-1989)
54 ENVIRONMENTAL SCIENCES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
ELECTRON SPIN RESONANCE
FLUIDS
GASES
HYDROPEROXY RADICALS
HYDROXYL RADICALS
KINETICS
MAGNETIC RESONANCE
MEDIUM TEMPERATURE
NITROXYL RADICALS
RADICALS
REACTION KINETICS
RESONANCE