文献类型：期刊文献

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

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

机构：[1]State Key Laboratory of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China

年份：2023

卷号：34

期号：4

起止页码：332

中文期刊名：Chinese Chemical Letters

外文期刊名：中国化学快报（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2023_2024】；PubMed;

基金：funded by the National Natural Science Foundation of China (Nos. 21991103, 21991104, 22008074, 22008072);Natural Science Foundation of Shanghai (No. 20ZR1415700);China Postdoctoral Science Foundation (Nos. 2020M671025,2019TQ0093)。

语种：英文

中文关键词：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 characteristic 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 stagnation 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-1in the flow rate range of 10–40 m L/min.