SURFACE FRACTALITY STRUCTURE OF γ -Al_2O_3

Ge Qingfeng; Li Shaofen and Liao Hui(Department of Chemical Engineering Tianjin University; Tianjin 300072)

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SURFACE FRACTALITY STRUCTURE OF γ -Al_2O_3

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- SURFACE FRACTALITY STRUCTURE OF γ -Al_2O_3
- CIESC Journal Issue 2, (1993)
- 作者机构：
  
  天津大学化学工程系,天津大学化学工程系,天津大学化学工程系天津300072,天津300072,天津,300072
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 April 1993，
  
  Published：25 April 1993
- 稿件说明：
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Ge Qingfeng, Li Shaofen and Liao Hui(Department of Chemical Engineering Tianjin University, Tianjin 300072). SURFACE FRACTALITY STRUCTURE OF γ -Al_2O_3[J]. CIESC Journal, 1993, (2).
DOI：

Ge Qingfeng, Li Shaofen and Liao Hui(Department of Chemical Engineering Tianjin University, Tianjin 300072). SURFACE FRACTALITY STRUCTURE OF γ -Al_2O_3[J]. CIESC Journal, 1993, (2). DOI：

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

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.

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