- Title
- Experimental study of gas-liquid-solid flow characteristics in slurry Taylor flow-based multiphase microreactors
- Creator
- Peng, Zhengbiao; Gai, Shaolei; Barma, Milan; Rahman, Mohd. Mostafizur; Moghtaderi, Behdad; Doroodchi, Elham
- Relation
- Chemical Engineering Journal Vol. 405, no. 126646
- Publisher Link
- http://dx.doi.org/10.1016/j.cej.2020.126646
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2021
- Description
- The gas-liquid-solid (G-L-S) three-phase flow characteristics are essentially linked to the design of slurry Taylor flow (STF)-based multiphase microreactors (STFRs), thus directly dictating the reactor operating performance. In this study, we examine the G-L-S flow patterns, solid spatial distribution, liquid-solid slurry stability, slug length (LS), bubble size (LB) and rising velocity (VB) in STFRs and their dependence on operating conditions. Under high Reynolds numbers (Re'≥681), many particles are present in the liquid film and significant bubble surface wave disturbance is observed even when the Capillary number is low (Ca'<0.01). Depending on whether bubble surface distorts (BSD) and/or particles travel between slugs (PTS), four STF patterns are identified and mapped against the flow conditions, with pattern I (with no BSD or PTS) and pattern IV (with both BSD and PTS) occurring at low and high fluids velocities, respectively. The STF patterns are independent of solid loading (when <10%v/v) but show dependency on particle size and flow conditions. Both solid loading and particle size marginally affect VB, yet have a profound impact on LB and LS. Empirical correlations for predicting VB, LB and LS in STFRs are developed. The correlation of VB proves valid for both slurry and standard Taylor flow systems covering 1.2≤Re'≤3551 and 0.0002≤Ca'≤0.39 for a wide range of fluids in both circular and square channels with size of 480µm-3.02mm.
- Subject
- multiphase microreactor; slurry Taylor flow; solid loading; bubble velocity; gas-liquid-solid flow; flow pattern
- Identifier
- http://hdl.handle.net/1959.13/1423659
- Identifier
- uon:37960
- Identifier
- ISSN:1385-8947
- Rights
- © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
- Language
- eng
- Full Text
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