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Title: Reaction of OH + NO{sub 2} + M: A new view

A reexamination of data and theoretical computations for the title reaction leads to the conclusion that both HONO{sub 2} (nitric acid) and HOONO (pernitrous acid) can be formed. The authors describe hindered-Gorin RRKM calculations that fit most of the extant data and explain differences among the studies. The rate constant for nitric acid formation at low temperatures could be considerably ({approximately}20%) lower than the data for loss of OH in the presence of NO{sub 2} would indicate. The atmospheric consequences of this low rate on ozone and nitrogen oxide concentrations is examined through the use of box models. A tentative recommendation for the rate constants for the individual steps as functions of temperature and density in the NASA format is included.
Authors:
;
Publication Date:
OSTI Identifier:
20034419
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Physical Chemistry A: Molecules, Spectroscopy, Kinetics, Environment, amp General Theory; Journal Volume: 104; Journal Issue: 17; Other Information: PBD: 4 May 2000
Research Org:
SRI International, Menlo Park, CA (US)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; ATMOSPHERIC CHEMISTRY; HYDROXYL RADICALS; NITROGEN DIOXIDE; REACTION INTERMEDIATES; CHEMICAL REACTION KINETICS; NITRIC ACID; MATHEMATICAL MODELS