Use Of Pyrolysis Gas As Reburn Fuel

To lower NOx emissions the process "Fuel Splitting and Staging" is investigated on bench scale in a test facility at the University of Stuttgart. Raw coal is introduced into an electrically heated entrained flow reactor where it is split into pyrolysis gas and residual char. In this staged combustion process the remaining char is used as primary fuel and the pyrolysis gas as reburn fuel. The test facility allows a systematic study in order to evaluate the effect of different parameters on NOx reduction independently. The quantity and quality of the char and the pyrolysis gas are dependant on coal type, temperature, residence time and carrier gas composition.