期刊
MICROCHEMICAL JOURNAL
卷 155, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.microc.2020.104662
关键词
Microchannel; Villermaux/Dushman; Mixing performance; Segregation index; Reynolds number
资金
- National Natural Science Foundational of China [51604135, 51504116]
- Yunnan Ten Thousand Talents Plan Young & Elite Talents Project [YNWR-QNBJ-2018-323]
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-/IO(3)(-)parallel competition reaction covering the whole flow regime, and measured using segregation index (Xs) covering different lengths of outlet tube (L-out), volume of mixing chamber (V-mc) 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 (d(out)) and inlet tube diameter (d(in)). The highest mixing efficiency corresponds to highest Reynolds number, c(H+) = 0.05 mol/L, R = 1, d(in) = d(out) = 5 mm, L-out = 20 cm and V-mc = 0.9 cm(3). 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.
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