| 异形催化剂效率因子的数值计算 |
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| 引用本文： | 赵毅,葛世英,蔡云升,李盘生.异形催化剂效率因子的数值计算[J].华东理工大学学报(自然科学版),1989(6). |
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| 作者姓名： | 赵毅 葛世英 蔡云升 李盘生 |
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| 作者单位： | 华东化工学院化学工程系
(赵毅，葛世英，蔡云升)，华东化工学院化学工程系(李盘生) |
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| 基金项目： | 中国科学院自然科学基金 |
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| 摘 要： | 推导了用有限差分方程计算催化剂颗粒效率因子的方法,并计算了几种异形催化剂(三叶草形,圆柱形,五叶形,环形)的效率因子。计算结果表明:三叶草形催化剂在化学反应中的内扩散性能大大优于圆柱形;对于颗粒内扩散控制的催化反应过程,采用异形催化剂可以显著提高表观反应速度;在体积相同的条件下,四种形状催化剂的效率因子的大小为:环形>三叶草形>五叶形>圆柱形。提出了形状对效率因子影响的估值不等式。
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| 关 键 词： | 催化剂 效率因子 有限差分 |
Numerical Calculation of Effectiveness Factors of Non-Cylindrical Catalyst Particles |
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| Zhao Yi,Ge Shiying,Cai Yunsheng,Li Pangsheng.Numerical Calculation of Effectiveness Factors of Non-Cylindrical Catalyst Particles[J].Journal of East China University of Science and Technology,1989(6). |
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| Authors: | Zhao Yi Ge Shiying Cai Yunsheng Li Pangsheng |
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| Institution: | Department of Chemical Engineering |
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| Abstract: | The effectiveness factors of extruded catalysts of four different shapes were calculated numerically by finite difference method. The results of calculation show that the three-lobed catalyst is much better than cylindrical-shaped in diffusion behavior. When intra-particle diffusion limitation is important, the use of non-cylindrical catalysts can increase superficial reaction rate markedly. An evaluation inequality about the effect of catalyst shape on the effectiveness factor of catalyst is proposed. |
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| Keywords: | catalyst effectiveness factor finite difference |
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