Optimization of process-specific catalytic packing in catalytic distillation process: A multi-scale strategy
Optimization of process-specific catalytic packing in catalytic distillation process: A multi-scale strategy
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DOI：
10.1016/j.ces.2017.09.040
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发表时间：
2017-12
影响因子：
4.7
通讯作者：
Qinglian Wang;Chen Yang;Hong-xing Wang;T. Qiu
中科院分区：
文献类型：
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作者：
Qinglian Wang;Chen Yang;Hong-xing Wang;T. Qiu
提出了一种新的双向耦合多尺度模型来研究催化精馏过程。在模型中，采用着眼于结构催化填料反应性能的微观模型来计算催化精馏过程的实际速率，这是过程模拟的基本参数。此外，采用传统的过程模拟方法为微观模型提供了合适的边界条件。为了验证多尺度模型，采用多相催化醋酸甲酯水解作为测试体系。模拟的乙酸甲酯最终转化率和催化剂层效率因子与实验结果吻合较好。结果表明，当催化剂层当量直径从25.4 mm减小到8.1 mm时，催化剂层效率因子约提高到200%。该研究可为催化填料结构的优化提供理论指导。
A novel two-way coupling multi-scale model was proposed to investigate the catalytic distillation process. In the model, a microscopic model that focuses on the reactive performance of structure catalytic packing was used to calculate actual rate for catalytic distillation process, which is the basic parameter for process simulation. Furthermore, the traditional process simulation was used to provide proper boundary conditions for microscopic model. In order to validate the multi-scale model, heterogeneously catalyzed hydrolysis of methyl acetate was employed as a test system. The simulated final conversions of methyl acetate and catalyst layer efficiency factors were in good agreement with experimental results. The results indicated that as the equivalent diameter of catalyst layer decreases from 25.4 mm to 8.1 mm, the catalyst layer efficiency factor rises to 200% approximately. This study could provide a theoretical guide for the optimization of catalytic packing structure.