文献类型：期刊文献

英文题名：Residence time distribution and heat/mass transfer performance of a millimeter scale butterfly-shaped reactor

作者：Lv, Haicheng[1];Wang, Jundi[1];Shu, Zhongming[1];Qian, Gang[1];Duan, Xuezhi[1];Yang, Zhirong[1];Zhou, Xinggui[1];Zhang, Jing[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2023

卷号：34

期号：4

外文期刊名：CHINESE CHEMICAL LETTERS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000934316100001)】；

基金：Acknowledgments This research was funded by the National Natural Science Foun-dation of China (Nos. 21991103 , 21991104 , 220 08074 , 220 08072) ; Natural Science Foundation of Shanghai (No. 20ZR1415700) , China Postdoctoral Science Foundation (Nos. 2020M671025 , 2019TQ0093) . The authors thank Prof. Ya Cheng and Dr. Miao Wu from East China Normal University for the fabrication of reactor via femtosecond laser engraving.

语种：英文

外文关键词：Millimeter scale reactor; Computational fluid dynamics; Residence time distribution; Chained stagnant flow model; Overall heat transfer coefficient

摘要：A millimeter scale butterfly-shaped reactor was proposed based on sizing-up strategy and fabricated via femtosecond laser engraving. An improvement of mixing performance and residence time distribution was realized by means of contraction and expansion of the reaction channel. The liquid holdup was greatly increased through connection of multiple mixing units. Structure optimization of the reactor was carried out by computational fluid dynamics simulation, from which the effect of reactor internals on mixing and the influence of parallel branching structure on heat transfer were discussed. The UV-vis absorption spectroscopy was used to determine the residence time distribution in the reactor, and char-acteristic parameters such as skewness and dimensionless variance were obtained. Further, a chained stagnant flow model was proposed to precisely describe the trailing phenomenon caused by fluid stag-nation and laminar flow in small scale reactors, which enables a better fit for the experimental results of the asymmetric residence time distribution. In addition, the heat transfer performance of the reactor was investigated, and the overall heat transfer coefficient was 110-600 W m-2 K-1 in the flow rate range of 10-40 mL/min. (c) 2023 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.