Record Display for the EPA National Library Catalog


Main Title Measurements of Polycyclic Aromatic Compounds in the Cylinder of an Operating Diesel Engine.
Author Kittelson, D. B. ; Du, C. J. ; Zweidinger, R. B. ;
CORP Author Minnesota Univ., Minneapolis.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab.
Year Published 1985
Report Number EPA-R-810287; EPA/600/D-85/012;
Stock Number PB85-161263
Additional Subjects Aromatic polycyclic compounds ; Exhaust emissions ; Particles ; Sampling ; Air pollution ; Experimental design ; Design criteria ; Chemical analysis ; Concentration(Composition) ; Diesel engine exhaust ; Air pollution sampling ; Air pollution detection ; Procedures
Library Call Number Additional Info Location Last
NTIS  PB85-161263 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 16p
A unique system which allows sampling of the entire contents of one of the cylinders of a 5.7-liter V-8 indirect-injection diesel engine has been developed. An explosively actuated cutter ruptures a diaphragm in the combustion chamber and allows the contents of the cylinder to rush out and be subsequently diluted and quenched with cool nitrogen. Particles are collected with a high-volume impactor/filter system. This system has been used to collect a series of particle samples at crankangles ranging from 5 to 40 degrees after top dead center. Particle samples from the exhaust were also obtained. The samples have been extracted to determine the soluble organic fraction. These extracts have been analyzed for five polycyclic aromatic compounds: pyrene, fluoranthene, benz(a)pyrene, benz(k)fluoranthene, and 1-nitropyrene. The results indicate significant removal of the first four between the combustion chamber and the exhaust manifold. The 1-nitropyrene behaves differently, however, with higher concentrations in the exhaust samples than in the cylinder samples. This suggests that 1-nitropyrene is formed during the expansion stroke and/or in the exhaust manifold.