Comparison of Emission Rates of Monocyclic Aromatic Hydrocarbons in Exhaust Gases from Selected Types of Cars during the Nedc Driving Test

An increase in unleaded gasoline consumption causes growth of enussion of monocyclic aromatic hydrocarbons (MAlIs) such as benzene and its a1ky1ated derivatives: toluene, ethylbenzene, isopropylbezene, and trimethylbenzenes (TMB). These compounds are highly toxic in both, direct andindirect effects onliving organisms. This paper describes the applied method of measurements and presents results of a study on benzene and its homologues in car exhaust, obtained during driving test performed on a chassis dynamometer at Emission Testing Laboratory at theBOSMAL Automotive Research andDevelopment Centre in Bielsko Boo. Examples of some MAHs emission factors are reported. Effects of the use of a catalytic converter (TWC) andtemperature conditioning of cars on MAHs emissions from examined vehicles were assessed. Results of determination ofMAHs content in various types of gasolines and in diesel fuel arealsopresented.