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Mixing performance in T-shape microchannel at high flow rate for Villermaux-Dushman reaction
Microchemical Journal ( IF 4.9 ) Pub Date : 2020-06-01 , DOI: 10.1016/j.microc.2020.104662
Peng lv , Liangjing Zhang , C. Srinivasakannan , Shiwei Li , Yuan He , Kaihua Chen , Shaohua Yin

Abstract An empirical analysis is conducted to evaluate the effect of the geometric parameters of microchannel on the mixing performance at high flow rates. The mixing performance is assessed using I−/IO3−parallel competition reaction covering the whole flow regime, and measured using segregation index (Xs) covering different lengths of outlet tube (Lout), volume of mixing chamber (Vmc) covering a wide range of Reynolds number. Results show that the channel geometric parameters have significant influence on the mixing process. The segregation index is found to increase with increase in H+concentration and volumetric flow ratio (R), while decrease with increase in the outlet (dout) and inlet tube diameter (din). The highest mixing efficiency corresponds to highest Reynolds number, c(H+) = 0.05 mol/L, R = 1, din = dout = 5 mm, Lout = 20 cm and Vmc = 0.9 cm3. Regression analysis is performed to relate the micromixing time with the influencing parameters. An optimal mixing time of 0.5 ms can be achieved in a T-shape microchannel. As compared to other forms of reactors, the optimized T-shape microchannel is identified to possess excellent mixing characteristics, which could find promising applications for high flux reaction process.

中文翻译:

Villermaux-Dushman 反应在高流速下在 T 形微通道中的混合性能

摘要 对微通道几何参数对高流速混合性能的影响进行了实证分析。混合性能使用覆盖整个流态的 I-/IO3-平行竞争反应进行评估,并使用覆盖不同出口管长度 (Lout)、混合室体积 (Vmc) 的分离指数 (Xs) 测量,覆盖范围广泛雷诺数。结果表明,通道几何参数对混合过程有显着影响。发现分离指数随着 H+ 浓度和体积流量比 (R) 的增加而增加,而随着出口 (dout) 和入口管直径 (din) 的增加而减少。最高混合效率对应最高雷诺数,c(H+) = 0.05 mol/L,R = 1,din = dout = 5 mm,Lout = 20 cm,Vmc = 0.9 cm3。进行回归分析以将微混合时间与影响参数相关联。在 T 形微通道中可以实现 0.5 ms 的最佳混合时间。与其他形式的反应器相比,优化的 T 形微通道被认为具有优异的混合特性,可以在高通量反应过程中找到有前景的应用。
更新日期:2020-06-01
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