在多孔固体催化剂颗粒中的串连扩散反应是非常重要的一类化学反应 ,如水解反应 ,卤化反应和氧化反应等 .分数几何对称模型已用于分析这类反应的一般规律 .为了得到多孔固体催化剂颗粒内非均相催化反应的各因素 ,这个模型将拓宽单颗粒化学反应工程的认识领域 .而且 ,在多孔固体催化剂颗粒填充床中分数参数m和实验数据间的关系Dui=φ2 im +1也已推得 . Tandem diffusion reaction in porous solid catalyst particles is a very important chemical reaction such as hydrolysis reaction, halogenation reaction and oxidation reaction, etc. Fractional geometric symmetry model has been used to analyze the general rule of this kind of reaction.In order to obtain porous solid This model broadens the field of understanding of single-particle chemical reaction engineering.Furthermore, the relationship between fractional parameter m and experimental data in a packed bed of porous solid catalyst particles Dui = φ2 im +1 Has also been deduced.