Wroclaw University of Science and Technology, Faculty of Mechanical Engineering, Department of Automotive Engineering, Wrocław, PL
DETERMINATION OF VOLATILE ORGANIC COMPOUNDS FOR COMBUSTION ENGINES COMPLIANT WITH EURO 4 AND EURO 6
Volatile organic compounds are considered as one of the most harmful pollutants. They are a threat to human life through direct toxic effects as well as through indirect action leading to the formation of secondary air pollutants. Toxic effect is a harmful for living organisms, exerting a degrading effect on tissues, organs or biological processes. Among volatile organic compounds are hydrocarbons, which belongs to one of the chemicals groups monitored in the process of using vehicles. The work emphasized VOC toxicity in the light of the changes in the legislation on engine exhaust emissions. The volatile compounds deliberated here are not considered as a separate group of compounds in the European legislation on emission limits. However, due to their high toxicity, it was decided to check, with aid of an appropriate analytical method, the VOC emission in the exhaust fumes of the vehicles in relation to the Euro standards. For the determination of volatile organic compounds, the exhaust gases of selected passenger cars were tested. Vehicles met certain exhaust emission standards - the first Euro 4 standard, the second Euro 6 standard. Gas chromatography was used for the studies. This is the only method that separates the individual hydrocarbons in the exhaust gases. The results have been verified with regard to the introduction of increasingly restrictive Euro standards. Presented results of the preliminary investigation should prompt researchers to discuss on include the determination of volatile organic compounds in engine exhaust to standard tests carried out prior to the admission of vehicles to the market.
Keywords: VOCs, engine exhausts, Euro standards, chromatography