长链烷烃脱氢制单烯烃动力学模型Ⅱ.工业脱氢反应器模拟

Kinetic Model of Heavy Paraffin Dehydrogenation to Mono-Olefins Ⅱ.Simulation of Industrial Dehydrogenation Reactor

以高纯度的长链烷烃为原料,采用固定床工业脱氢反应器进行反应制取直链单烯烃,其中脱氢催化剂在使用过程中会缓慢失活。采用一维拟均相绝热径向反应器模型模拟工业脱氢反应器,结合长链烷烃的反应动力学模型,推导出物料衡算式以及热量衡算式,模拟估算工业脱氢反应,还定量预测和分析了反应器操作条件对反应的影响,确定了工业反应器催化剂失活动力学方程。结果表明,模型拟合效果良好,催化剂的活性随使用时间增长而下降,并成线性关系。该模型可用于催化剂活性变化的定量预测。

With high-purity heavy paraffin as raw material,the dehydrogenation of heavy paraffin to mono-olefins was carried out in an industrial fixed-bed reactor,during which the catalyst deactivated slowly.Based on the material balance and heat balance equations derived from one-dimensional homogenous adiabatic radial reactor model and dehydrogenation kinetic model,the dehydrogenation of heavy paraffin on industrial reactor was simulated and the influences of operating conditions were also predicted quantitatively.The fitting result of model was good,and the catalyst activity declined with time showing a linear relationship.The established catalyst deactivation equation could be used to quantitatively predict the change of catalyst activity during dehydrogenation.