| 摘要 |
PURPOSE: To obtain a catalyst having a multi-component membrane top layer without any defect and crack by mixing stable sols of alumina and CeO2 or TiO2 to prepare a binary sol and by impregnating a support into the sol to make the top layer. CONSTITUTION: The stable boehmite sol and stable sols of CeO2 or TiO2 are prepared; and these sols are mixed at a controlled condition to form the binary sol of Al2 O3 -CeO2 or Al2 O3 -TiO2 . Anα-alumina support or the like is impregnated into this sol at a specialized condition,. Then, the obtained to layer 2 is dried and then sintered. By changing a chemical component of the membrane top layer in this way, the catalyst which is good in adsorption/diffusion of gas/solid and has a multi-component membrane top layer without any defect and the crack is obtained.
|
