Co-pyrolysis of coal/biomass and coal/sewage sludge mixtures

Biomass and sewage sludge are attracting increasing interest in power plant technology as a source of carbon-dioxide-neutral fuels. A new way to reduc e the consumption of fossil fuels could be the co-combustion or co-gasifica tion of coal and biomass or coal and sell age sludge. In both cases, pyroly sis is the first step in the technical process. In order to obtain derailed information about the pyrolysis of coal/biomass and coal/sewage sludge mix tures as well as unblended fuels, the ''Institut fur Verfahrenstechnik und Dampkesselwesen (IVD)'' at the University of Stuttgart has carried out inve stigations using an electrically heated entrained flow reactor. The test ru ns provided information about fuel conversion efficiency, pyrolysis gas and tar yield.