1996-05-01

Pyrosynthesis of PAH in a Modern IDI Diesel Engine 961230

N-hexadecane, kerosene and diesel fuels were used for powering a new IDI diesel engine in order to elucidate the role of in-cylinder pyrosynthesis of PAH in diesel emissions. The present work is a complementary to previous investigations (1,2,3) where exhaust deposits have contributed to and interfered with the results. This was eliminated by using a brand new deposit-free engine. Nonetheless, high levels of PAH were detected in the exhaust even with the PAH free fuels. This was attributable to the high rates of lube oil consumption during the running-in period of this engine. The fuel PAH were also shown to play a significant role in the total emissions of these species in diesel combustion.

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