Tar Reduction Mechanisms on a Non-Catalytic Hot Gas Filter in a Biomass Gasification Plant

M. Prantauer, A. Hofmann, G. Kreutner & M.B. Huber
With the long­term operation of the FBRR­gasification plant, a decomposition of tars at the non­catalytic hot­gas­filter could be observed. In order to describe the tar decomposition mechanisms and their dependence on the hot char coal layer, the conversion of benzene, toluene and naphthalene as model substances was investigated at standard filter operation conditions in a laboratory reactor. The effect of homogenous gas phase reactions was additionally examined by equilibrium simulations with ASPEN.