Micromixing efficiency intensification of a millimeter channel reactor in the high gravity field
Micromixing efficiency intensification of a millimeter channel reactor in the high gravity field
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DOI：
10.1016/j.ces.2021.117407
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发表时间：
2022-01-20
影响因子：
4.7
通讯作者：
Chen, Jian-Feng
中科院分区：
文献类型：
--
作者：
Bai, Shun;Li, Wen-Si;Chen, Jian-Feng
毫米通道反应器可以实现快速混合，在许多化工过程中得到了应用。为了强化微混合性能，以往的研究主要集中在结构开发和操作条件的优化上。然而，在毫米通道反应器中利用超重力场来提高微混合性能的研究还很少。提出了一种新型的旋转毫米通道反应器（RMCR），它利用离心力和科里奥利力来进一步强化微观混合性能。实验研究了RMCR的分离指数（X-s）和微观混合时间（t（m）），以评价其微观混合效率。结果表明，与传统的无旋转毫米通道反应器相比，旋转毫米通道反应器的微观混合效率提高了35%。根据实验数据建立的掺入模型，计算出RMCR的t（m）值为10（6）~ 10（4）s。强化机理分析表明，超重力场有效地强化了高速接触，强化了预混性能。该研究为利用超重力场改善毫米通道反应器的微观混合性能提供了一种新的思路。(C)2022爱思唯尔有限公司保留所有权利。
A millimeter channel reactor which can achieve rapid mixing has been applied in many chemical processes. To intensify the micromixing performance, previous studies focused on the structure development and the optimization of operating conditions. However, using high gravity field for micromixing performance enhancement in the millimeter channel reactor has scarcely been assessed. In this work, a novel rotating millimeter channel reactor (RMCR) was proposed, which used centrifugal and Coriolis forces to further intensify the micromixing performance. The segregation index (X-s) and micromixing time (t(m)) of the RMCR were experimentally studied to evaluate the micromixing efficiency. Results showed that the micromixing efficiency of the RMCR was better up to 35% than that of the conventional millimeter channel reactor without rotation by the comparsions of X-s. According to the incorporation model based on the experimental data, the value of t(m) in the RMCR was calculated to be 10 (6) -10 (4) s. Furthermore, the intensification mechanism analysis illustrated that the high gravity field effectively enhanced the contact with high velocity to intensify the premixing performance. This work provides a new strategy to improve the micromixing performance in the millimeter channel reactor via high gravity field. (C) 2022 Elsevier Ltd. All rights reserved.