| 摘要 |
PURPOSE:To keep catalytic activity such as denitrification activity and to reduce the thickness of a catalyst by laminating a dense ceramic substrate layer and a ceramic porous layer to a substrate and supporting a catalytically active component in the porous layer or on the surface thereof to prepare a plate- shaped laminated catalyst. CONSTITUTION:A substrate layer composed of a dense ceramic material is formed on a substrate composed of a heat-resistant plate-shaped body such as a metal plate, a metal net, an inorg. sintered substrate or an inorg. fiberboard using a technique such as a flame spraying method or a plasma spraying method. A ceramic porous layer composed of aluminum oxide or silicon oxide similar to the substrate layer is formed by adapting an impregnation method or a coating method. Subsequently, a catalytically active component is supported in the ceramic porous layer and/or on the surface of said porous layer by employing an impregnation method or a coating method to form a plate-shaped laminated catalyst. The obtained catalyst has a large specific surface area because of its porous layer and is reduced in its catalytic activity. |
