Abstract
Development of tar removal from gasified gases is one of the most important issues for thermal gasification of organic waste such as woody debris. Using laboratory-scale catalytic reformers and gasifier, characteristics of tar removal using porous silica and availability of catalyst and porous silica regeneration were discussed. Commercial Ni-based catalyst and several kinds of porous silica, which has different surface areas, were applied to the reforming reaction. From gasification and reforming experiments using woody waste, application of the porous silica led to reduction of highly-polymerized polycyclic aromatic hydrocarbons (PAHs). When catalyst regeneration by air oxidation was carried out at around 1030 K, which is also reforming temperature, hydrogen concentration was almost sustained in the second reforming operation or later. It was also shown the catalyst would have enough reforming activity at relatively low temperature condition.
