Hydrocarbon emissions speciation in diesel and biodiesel exhausts

摘要: Abstract Diesel engine emissions are composed of a long list organic compounds, ranging from C2 to C12+, and coming the hydrocarbons partially oxidized in combustion or produced by pyrolisis. Many these considered as ozone precursors atmosphere, since they can interact with nitrogen oxides produce under atmospheric conditions presence sunlight. In addition problematic production, Brookes, P., Duncan, M. [1971. Carcinogenic human cells culture. Nature.] Heywood, J. [1988. Internal Combustion Engine Fundamentals.Mc Graw-Hill, ISBN 0-07-1000499-8.] determined that polycyclic aromatic present exhaust gases dangerous health, being highly carcinogenic. The aim this study was identify means gas chromatography amount each hydrocarbon species diesel engines operating different biodiesel blends. levels reactive non-reactive powered fuel blends were also analyzed. Detailed speciation revealed drastic change nature quantity semi-volatile compounds when fuels employed, most affected compounds. Both oxygenated found exhaust. Finally, conservation for off-side analysis possible influence on chemical characterization compound phase discussed. use shows reduction Engine-Out total hydrocarbons. But potential is more dependent compositions Engine-Out, quantity; large percent existing exhaust, used, burned hydrocarbons, interesting have maximum reactivity, but pure diesel, unburned less reactivity. best composition fuel, control needs be high-saturated fatty acid content.