甲醇合成催化剂内扩散效率因子三种模型数值解的比较 Ⅱ.表面中毒催化剂内扩散效率因子  

COMPARISON OF NUMERICAL SOLUTIONS OF THREE KINDS OF DIFFUSION MODELS FOR THE EFFECTIVENESS FACTOR OF METHANOL SYNTHESIS CATALYSTⅡ.EFFECTIVENESS FACTOR FOR SURFACE POISONED CATALYST

作　　者：姚佩芳[1] 王少宇[1] 刘国际[1] 朱炳辰[1] 

机构地区：[1]华东化工学院,上海200237

出　　处：《燃料化学学报》1993年第3期252-260,共9页Journal of Fuel Chemistry and Technology

摘　　要：建立了三种扩散模型——一维多组分扩散模型,一维简化多组分扩散模型和一维关键组分扩散模型,用以计算中毒甲醇合成催化剂复合反应的内扩散效率因子,用正交配置法求取数值解。以失活多组分扩散模型的计算结果为基准分别与二种不同简化程度模型的计算结果相比较,在催化剂部分失活的情况下,推荐使用简化多组分扩散模型。Three kinds of diffusion models for calculating the effectiveness factor of methanol synthesis over surface poisoned catalyst have been set up:the multi-component diffusion model,the simplified multi-component diffusion model and the key component dif- fusion model.Numerical solutions of effectiveness factor for each model have been obtained by orthogonal collocation method.Solutions for the two simplified models were compared with the solutions for multi-component diffusion model.For slightly poisoned catalysts,ef- fectiveness factors can be calculated by the key-component diffusion model.The deviation of effectiveness factor values calculated by the key-component diffusion model from those cal- culated by the multi-component diffusion model becomes greater as the poisoned fraction in- creases.As the deviation of effectiveness factor values calculated by the simplified multi- component diffusion model from those calculated by the unsimplified model is less and the time required for calculation is not very long,the simplified multi-component diffusion mod- el is recommended for calculating the effectiveness factor of poisoned catalysts.

关 键 词：甲醇 效率因子 催化剂 正交配置法 

分 类 号：O623.411[理学—有机化学]