Abstract: The surface pore structure of porous γ-A12O3 was investigated with SEM and adsorption methods. The SEM photos with different magnifications showed that the surface of γ - A12O3 particle was of self-similarity qualitatively. The monolayer values of different ad-sorbates were determined with the frontal gas chromatography. The surface pore structure was analyzed on the basis of fractal geometry and a fractal dimension of 2. 78 was calculated from the experimental data.

摘要： 在多相催化反应过程中，化学反应与多孔催化剂的表面密切相关。由于表面的不规则性， 以往基于欧氏几何的数学处理，显得过于理想化和简单化。近年来发展起来的分形几何为更 好地表征催化剂及载体的表面拓朴特征提供了新的可能。在这方面，Avnir、Pfeifer和Farm 等f‘－引做了一系列的工作，认为自然界中许多物质属干表面分形，其分形维数为2～人