Record Display for the EPA National Library Catalog

RECORD NUMBER: 136 OF 204

OLS Field Name OLS Field Data
Main Title Peroxyacetyl Nitrate (PAN) in the Unpolluted Atmosphere: An Important Reservoir for Nitrogen Oxides.
Author Singh, Hanwant B. ; Hanst, Philip L. ;
CORP Author SRI International, Menlo Park, CA.;Environmental Sciences Research Lab., Research Triangle Park, NC.
Year Published 1981
Report Number EPA-R-806729; EPA-600/J-81-628;
Stock Number PB83-231423
Additional Subjects Air pollution ; Oxidation ; Nitrogen oxides ; Ethane ; Propane ; Reaction kinetics ; Troposphere ; Stratosphere ; Concentration(Composition) ; Chemical equilibrium ; Acetaldehyde ; Acetone ; Chemical reactions ; Reprints ; Peroxyacetyl nitrate ; Chemical reaction mechanisms
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB83-231423 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 6p
Abstract
Based on the measured atmospheric distributions of ethane and propane (at midlatitudes in the northern hemisphere) and a simplified mechanism for their oxidation, it is predicted that acetaldehyde, acetone, and PAN are ubiquitous components of the troposphere and the lower stratosphere. Average concentrations of acetaldehyde of 22 ppt, 3 ppt, and 7 ppt; acetone of 111 ppt, 15 ppt, and 3 ppt; and PAN concentrations of 17 to 34 ppt, 90 to 360 ppt, and 40 to 85 ppt are estimated for the lower troposphere, upper troposphere, and the lower stratosphere respectively. These calculations suggest that in the troposphere, nitrogen oxides contained in their organic form may be as much or more abundant as their inorganic form. This organic form of reactive nitrogen is in chemical equilibrium (CH3C(O)OONO2 yields CH3C(O)OO + NO2) with inorganic NO2 and acts as reservoir of inorganic NO(x). Measurement methods for PAN are currently available to verify these predicted results.