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MM: Fachverband Metall- und Materialphysik
MM 2: Topical Session TEM I
MM 2.6: Vortrag
Montag, 14. März 2011, 12:45–13:00, IFW A
Soot formation in a diesel engine — •Mirza Mačković1,2, Sebastian Pflaum3, Gerhard Frank2, Erdmann Spiecker1, Georg Wachtmeister3, and Mathias Göken1,4 — 1Center for Nanoanalysis and Electron Microscopy (CENEM), Cauerstraße 6, 91058 Erlangen, Germany — 2Institute of Biomaterials, Cauerstraße 6, 91058 Erlangen, Germany — 3Institute of Combustion Engines, Schragenhofstraße 31, 80992 Munich, Germany — 4Department of Materials Science and Engineering, General Materials Properties, Martensstraße 5, 91058 Erlangen, Germany
Diesel engine soot is known as one of the main environmental pollutants and has become an important environmental and scientific topic. Diesel soot is a product of pyrolysis or incomplete combustion of hydrocarbons. Especially, the formation mechanism of soot particles is one of the central themes of research activities in the area of combustion and pyrolysis of fossil fuels. It is known that soot particles from the exhaust of diesel engines appear as chain-like agglomerates and consist of several tens to hundreds of primary soot particles. In this study soot particles are collected from nearly the centre of the combustion chamber of a diesel engine, using a newly developed technique, and analyzed by means of transmission electron microscopy and electron energy loss spectroscopy. Thus the development of the soot nanostructure could be shown as a function of crank angle and time after the combustion of the diesel fuel begins. The early formation, growth and oxidation of the soot particles are observed and some aspects regarding the complex process of soot formation are proposed.