Mineral oil based fuels for domestic heating burner systems and diesel-engines are always mixtures of many components with a wide distillation range. These ensure, for example, a low viscosity and good cold start properties. Alternative fuels, which only partially show these physical properties, are introduced into the fuel market because of political and ecological aspects. Beside the growing fuel diversification new combustion technologies like surface evaporators for reforming processes, for burner systems in the automotive and the domestic heating sector are developed. So the requirements on modern burner technologies are changing. The burners should have a wide modulation range, good cold start properties, a high power density and allow the operability with different fuels. Nevertheless a consistent understanding of the vaporisation characteristics of multi-component fuels under combustion conditions is not fully developed. The aim of the project DGMK-749 is the development of a laboratory method to characterise deposit formation tendency of multi-component liquid fuels in burners. Particularly, incomplete vaporisation can cause the formation of carbon rich deposits on hot surfaces. Characteristic fuel properties like viscosity, density, the boiling range and the composition are analysed in order to reveal correlations with deposit formation tendency of liquid multi-component fuels. The deposit formation of different fuels is investigated in the present work at different evaporator surface temperatures.
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