Record Display for the EPA National Library Catalog


Main Title Automotive Hydrocarbon Emission Patterns and the Measurement of Nonmethane Hydrocarbon Emission Rates.
Author Black, Frank ; High., Larry ;
CORP Author Environmental Sciences Research Lab., Research Triangle Park, N.C.
Year Published 1977
Report Number EPA/600/J-77/009;
Stock Number PB-268 145
Additional Subjects Hydrocarbons ; Automobile engines ; Gas analysis ; Exhaust emissions ; Chemical analysis ; Methane ; Air pollution control ; Gas chromatography ; Infrared spectroscopy ; Monitoring ; Concentration(Composition) ; Experimental design ; Laboratory equipment ; Monitors ; Air pollution detection ; Automobile exhaust ; Catalytic reactors(Exhaust system)
Library Call Number Additional Info Location Last
NTIS  PB-268 145 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 19p
The advent of emission control technology has resulted in significant changes in both the total mass and detailed patterns of hydrocarbons emitted from automobiles. Emission rates of 56 hydrocarbons from 22 motor vehicles, including catalyst and noncatalyst configurations, were determined for the Federal Urban Driving Cycle. An increased relative abundance of methane is indicated for vehicles equipped with oxidation catalysts. In view of the photochemically non-reactive nature of methane, simple and economic procedures for determination of vehicle nonmethane hydrocarbon emission rates are evaluated. In general the procedures evaluated require independent total hydrocarbon and methane analysis, with the nonmethane hydrocarbon level calculated by difference. The procedures are evaluated by comparison of indicated nonmethane hydrocarbon emission rates with rates obtained by summation of individual compound rates determined by advanced gas chromatographic procedures.