The reaction of gaseous N sub 2 O sub 5 with solid NaCl at 298 K: Estimated lower limit to the reaction probability and its potential role in tropospheric and stratospheric chemistry

Journal Article · Tue Jan 01 04:00:00 EST 1991 · Geophysical Research Letters (American Geophysical Union); (USA)

DOI:https://doi.org/10.1029/90GL02595· OSTI ID:5548923

Livingston, F E; Finalyson-Pitts, B J ^[1]

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1. California State University, Fullerton (USA)

Gaseous N{sub 2}O{sub 5}/air mixtures were flowed over solid NaCl at 298 K and the gaseous product ClNO{sub 2} measured using FTIR. With excess NaCl, one CINO{sub 2} was produced per N{sub 2}O{sub 5} in the initial mixture, and from the contact time between N{sub 2}O{sub 5} and the salt, a lower limit to the fraction of collisions leading to reaction was estimated to be 2.5 {times} 10{sup {minus}3}. This reaction is sufficiently rapid that it may lead to the formation of ppb levels of ClNO{sub 2} overnight in polluted marine urban areas. The ClNO{sub 2} will photolyze at dawn to give chlorine atoms which initiate the photooxidation of organics in a manner analogous to OH. This reaction may also play a role in remote Arctic chemistry if the reaction is significantly faster than our lower limit. This supports the hypothesis of Michelangeli et al. (1990) that the N{sub 2}O{sub 5(g)} + NaCl{sub (s)} reaction may contribute significantly to stratospheric chemistry after the eruption of alkalic volcanoes such as El Chichon.

• OSTI ID: 5548923
• Journal Information: Geophysical Research Letters (American Geophysical Union); (USA), Journal Name: Geophysical Research Letters (American Geophysical Union); (USA) Vol. 18:1; ISSN 0094-8276; ISSN GPRLA
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ALKALI METAL COMPOUNDS
ARCTIC REGIONS
ATMOSPHERIC CHEMISTRY
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
CHLORIDES
CHLORINE
CHLORINE COMPOUNDS
DECOMPOSITION
EARTH ATMOSPHERE
ELEMENTS
FOURIER TRANSFORMATION
HALIDES
HALOGEN COMPOUNDS
HALOGENS
INFRARED SPECTRA
INTEGRAL TRANSFORMATIONS
MEDIUM TEMPERATURE
NITRITES
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
POLAR REGIONS
SEAS
SODIUM CHLORIDES
SODIUM COMPOUNDS
SPECTRA
SPECTROSCOPY
STRATOSPHERE
SURFACE WATERS
TRANSFORMATIONS
TROPOSPHERE
VOLCANOES