芳烃催化加氢交叉流反应器模型

Reactor model with cross-flow for aromatics catalytic hydrogenation

提出了一种抗硫中毒的芳烃加氢催化反应器模型,称之为交叉流反应器模型,把反应物料分为两股,其中含有噻吩的乙苯物料采用轴向连续流动方式由反应器进口进入催化剂床层,而氢气由铅直导管直接进入催化剂床层中,然后与乙苯物料混合。在氢气导管出口处形成含硫乙苯浓度低而氢气浓度高的特殊区域,因而硫对催化剂的中毒效应大幅度降低,整体上提高了乙苯加氢饱和反应效率。与传统轴向混合流反应器进行比较,在相同条件下交叉流反应器具有更好的整体加氢反应性能。分别建立了交叉流反应器与传统轴向混合流反应器模型,提出了两种反应器的催化反应转化率方程;利用此转化率方程,对实验数据进行处理,得到动力学参数,模型的计算结果与实验数据相吻合,也验证了在交叉流反应器中,硫的中毒效应明显减弱。

A novel reactor model named cross-flow reactor for aromatics catalytic hydrogenation was proposed. The reactants were divided into two flows, ethylbenzene with thiophene was introduced to the catalyst bed along the axial direction of the columnar reactor, while hydrogen was introduced into catalyst bed through a vertical pipe with openings. Because special areas with high H2 pressure and low H2S pressure were formed near these openings, the poisoning of catalyst by thiophene was substantially decreased, and consequently the reaction of ethylbenzene hydrogenation was improved as compared with the traditional reactor with mixed co-flow. Finally, kinetic models were established for this cross-flow reactor and the traditional reactor. And the conversion equations of these two reactors were given. By using these equations, the experiments data were fitted to obtain kinetics parameters, The calculation results agreed well with the experimental data. It was also demonstrated that sulfur poisoning in cross-flow reactor was weakened.