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Multiphase flow and multicomponent reactive transport study in the catalyst layer of structured catalytic packings for the direct hydration of cyclohexene
Chemical Engineering and Processing: Process Intensification ( IF 4.3 ) Pub Date : 2020-10-22 , DOI: 10.1016/j.cep.2020.108199
Qinglian Wang , Fengyun Zhang , Rong Huang , Xiaoda Wang , Chen Yang , Hongxing Wang , Ting Qiu

Reactive distillation is an important intensification technology to overcome the unfavorable equilibrium conversion for the direct hydration of cyclohexene. In this work, a multiphase flow and multicomponent reactive transport model in the catalyst layer was established. By virtue of the model, the influences of structural parameters of the catalyst layer, physical parameters of two-phase fluid and reaction conditions on the catalyst layer efficiency factor were investigated. It was found that physical parameters of two-phase fluid can influence the two-phase distribution, thus affecting the catalyst layer efficiency factor. The catalyst layer efficiency factor decreases slightly with the rise of solubilities of cyclohexene and cyclohexanol, although concentration of cyclohexanol and reaction conversion can be improved by the addition of co-solvents. Furthermore, it was found that the catalyst layer efficiency factor is independent on structural parameters approximately. Therefore, the design of process-specific catalytic packings has remarkable difference between miscible and immiscible reaction systems.



中文翻译:

环己烯直接水合的结构化催化填料的催化剂层中的多相流和多组分反应性输运研究

反应蒸馏是克服环己烯直接水合反应不利的平衡转化的重要强化技术。在这项工作中,建立了催化剂层中的多相流和多组分反应性传输模型。利用该模型,研究了催化剂层结构参数,两相流体的物理参数和反应条件对催化剂层效率因子的影响。发现两相流体的物理参数会影响两相分布,从而影响催化剂层效率因子。随着环己烯和环己醇溶解度的增加,催化剂层效率系数略有降低,尽管通过加入助溶剂可以提高环己醇的浓度和反应转化率。此外,发现催化剂层效率因数大约与结构参数无关。因此,特定过程的催化填料的设计在可混溶和不可混溶的反应系统之间具有显着差异。

更新日期:2020-11-03
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