We performed a serious demonstration test on woody biomass gasification and power generation system with a tar-free gas refinement process using oxygen. Our gas refinement process is composed of main two components, a gas reformer and a dust capture filter. In the gas reformer raising gas temperature over 1100 °C with the partial oxidization, most tar is decomposed but some soot is generated. First, we investigated gas reforming performance, changing the operating temperature and residence time As a result, the tar amount in the produced gas decreases on the higher operating temperature, longer residence time. In addition, the tar as carbon percentage in the reformed gas decreases obviously. Second, we investigated the lowest possible operating temperature of the dust filter, in order to cost saving and decrease tar amount in gas. As the result, it is possible to operate on 270 °C with no sticking. But it is difficult to capture the tar in the reformed gas.
