| 固定床反应器流向振荡操作的模拟算法——改进变步长差分法 |
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| 引用本文： | 张瑞生,项红.固定床反应器流向振荡操作的模拟算法——改进变步长差分法[J].华东理工大学学报(自然科学版),1993(3). |
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| 作者姓名： | 张瑞生 项红 |
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| 作者单位： | 华东化工学院联合化学反应工程研究所
(张瑞生)，华东化工学院联合化学反应工程研究所(项红) |
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| 摘 要： | 提出了改进的变步长差分法,用于求解固定床反应器作周期性流向切换操作时的温度分布和浓度分布。该方法能根据分布曲线的形状合理分布网格点,并在曲线迁移时自动调整格点分布,从而使格点数显著减少,计算时间大幅度下降。本方法用抛物线分段近似偏微分方程,使之成为三对角矩阵,简化了计算,便于求解。用SO_2氧化反应实验对算法作了验证。
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| 关 键 词： | 化学反应工程 固定床反应器 振荡 模拟 算法 |
An Algorithm for the Simulation of Fixed Bed Catalytic Reactors Operated Under Unsteady-State Conditions |
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| Zhang Ruisheng and Xiang Hong.An Algorithm for the Simulation of Fixed Bed Catalytic Reactors Operated Under Unsteady-State Conditions[J].Journal of East China University of Science and Technology,1993(3). |
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| Authors: | Zhang Ruisheng and Xiang Hong |
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| Institution: | Zhang Ruisheng~* and Xiang Hong |
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| Abstract: | A modified Crank-Nicolson method with non-equidistant space steps for solving the equations which describe fixed-bed catalytic reactors operated with periodic flow reversal has been presented. Its prime feature is the automatic positioning of grid points in the required region, thus reducing considerably the total number of grid points and hence the amount of computation time. This algorithm can be well suited to the dynamic reactor modelling for highly exothermic reactions in which steep concentration and temperature gradiants and moving profiles are commonly encountered. Numerical examples have been presented and theoretical predictions have been tested with experimental results of sulfur dioxide oxidation on vanadium catalyst. |
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| Keywords: | chemical reaction engineering fixed-bed reactor oscillation simulation algorithm |
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