蓄热段长度对流向变换催化燃烧反应器性能影响的模型研究

在建立低浓度挥发性有机化合物VOCs催化燃烧流向变换反应器一维非均相模型的基础上，编写Matlab程序对模型进行求解。分析在不同的表观气速下，反应器蓄热段长度对反应器性能的影响，着重研究大气速条件下反应器的最佳床层结构比例。计算结果表明，不同的蓄热段长度对反应器性能有很大影响。对于直径0.2 m的反应器，小气速条件下，反应器内最高温度随着蓄热段长度的增大而降低，大气速条件下则相反。在表观气速为0.15 m·s^-1和床层结构比例为1.2~2.0条件下，反应器能达到最佳操作状态。

Modeling a reversal flow reactor for catalytic combustion and the effects of regenerative length

An one-dimensional heterogeneous continuum model for lean VOCs catalytic combustion was established. The effects of regenerative length on the performance of catalytic flow reversal reactor were numerically studied by means of Matlab program under different superficial gas velocity. The optimal bed structure proportion was focused on under the condition of larger superficial gas velocity. The numerical results showed that different regenerative bed length had large effects on the reactor performance. The maximum temperatures in the reactor with the diameter of 0. 2 meter decreased with the increase of regenerative bed length under the condition of smaller superficial gas velocity,but were just opposite under the condition of larger superficial gas velocity. The reactor could reach the best operating condition under the bed structural proportion of 1. 2- 2. 0 and superficial gas velocity of 0. 15 m·s- 1.