Irfts spectroscopic study of the kinetics and the mechanism of the reactions in the gaseous system, HONO, NO, NO/sub 2/, H/sub 2/O

Conference · Thu Jan 01 04:00:00 EST 1976 · Am. Chem. Soc., Div. Environ. Chem., Prepr.; (United States)

OSTI ID:7317480

Chan, W H; Nordstrom, R J; Calvert, J G; Shaw, J H

The chemical transformation of the atmospheric mixture of hydrocarbons, CO, and nitrogen oxides to the irritants present in the oxidation products of the hydrocarbons, occurs through a series of chain reactions involving various active free radical species as chain carriers. One of the most important of these is the HO-radical, and the nitrous acid molecule is one of several potential sources of this radical in a sunlight-irradiated, polluted atmosphere. They build up through reactions 1 and 2: NO + NO/sub 2/ + H/sub 2/O ..-->.. 2HONO and 2HONO ..-->.. NO + NO/sub 2/ + H/sub 2/O. In turn the photolysis of HONO in sunlight may generate HO-radicals: HONO + hr ..-->.. HO + NO. The study provides the first direct measurement of the rate constants of the homogeneous reactions of 1 and 2. In view of this work it is recommended that those atmospheric scientists concerned with the chemistry within stack plumes include reactions 1 and 2 in their considerations.

• Research Organization: Ohio State Univ., Columbus
• OSTI ID: 7317480
• Conference Information: Journal Name: Am. Chem. Soc., Div. Environ. Chem., Prepr.; (United States) Journal Volume: 16:1
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AEROSOLS
AIR POLLUTION
CHALCOGENIDES
CHEMICAL REACTIONS
COLLOIDS
DISPERSIONS
FLUIDS
GASES
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXYL RADICALS
INFRARED SPECTROMETERS
INORGANIC ACIDS
KINETICS
MEASURING INSTRUMENTS
MONITORING
NITROGEN COMPOUNDS
NITROGEN OXIDES
NITROUS ACID
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL OXIDANTS
PLUMES
POLLUTION
PRECURSOR
RADICALS
SMOG
SOLS
SPECTROMETERS