摘要
用分形几何描述催化剂的表面形貌，用盒子维模型测定了不同制备方法和载体所制备的催化剂表面分形维数，分形维数Ｄ被看作是催化剂形貌的表征参数。结果表明：催化剂表面形态具有自相似性，催化剂表面分形维数介于２．５７至２．６７之间，尖晶石载体对催化剂表面分形维数影响最大，制备方法也影响催化剂表面分形维数，相同组成的催化剂表面分形维数增大，催化剂的ＣＯ转化率提高。
The fractal geometry has been employed to describe the catalyst morphology.The surface fractal dimension of catalysts prepared by different methods and supports were measured by box dimension model.The fractal dimension D is regarded as the characterization of catalyst morphology.The results show that the fractal surface texture of the catalysts has self similarity.The surface fractal dimension of catalysts is in the range 2 57 to 2 67.Both the spinel supports and preparation methods of catalysts greatly affect the surface fractal dimension.The CO conversion of catalysts for the same composition increases with increasing its fractal dimension.
