Record Display for the EPA National Library Catalog


Main Title Outdoor smog chamber studies : effect of hydrocarbon reduction on nitrogen dioxide /
Author Jeffries, Harvey.
Other Authors
Author Title of a Work
Fox, Donald.
Kamens, Richard.
Publisher U.S. Environmental Protection Agency,
Year Published 1975
Report Number EPA-650/ 3-75-011; EPA-R-800916; EPA-ROAP-21AZJ-008
Stock Number PB-245 829
OCLC Number 09678266
Additional Subjects Smog ; Test chambers ; Hydrocarbons ; Nitrogen dioxide(NO2) ; Air pollution ; Photochemical reactions ; Design criteria ; Solar radiation ; Air pollution control ; Humidity ; Ozone ; Performance evaluation ; Earth atmosphere ; Tetrafluoroethylene resins ; Nitrogen oxides
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD  EPA 650-3-75-011 Headquarters Library/Washington,DC 10/02/2014
EKBD  EPA-650/3-75-011 Research Triangle Park Library/RTP, NC 08/19/2016
ELBD ARCHIVE EPA 650-3-75-011 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ERAD  EPA 650/ 3-75-011 Region 9 Library/San Francisco,CA 03/18/2013
NTIS  PB-245 829 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation xiv, 208 pages : graphs, tables ; 28 cm
A 312 cu m (11,018 cu ft) Teflon film outdoor smog chamber was constructed in rural North Carolina. The chamber was operated with natural conditions of solar radiation, temperature and relative humidity which existed at the time of a run. Ninety-two 12-hour runs using propylene and oxides of nitrogen were conducted to assess the performance of the system. A photochemical model, in which only the light intensity magnitude and pattern and the rate of heterogeneous surface reactions were changed, was used to compare the outdoor results with those of three indoor chambers. Good agreement was found in all cases. One-hundred-thirty 12-hour runs were conducted using a simulated urban hydrocarbon mix and oxides of nitrogen. Reduction of the hydrocarbon concentration resulted in reductions of nitrogen dioxide (NO2) maximum concentration and, for large reductions, the daytime NO2 dosage. Other factors investigated included NO2 to NO ratio at constant NOx, effect of slow dilution, and results of extended 24-hour and 36-hour runs.