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Handling of Solids and Flow Characterization in a Baffleless Oscillatory Flow Coil Reactor
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-01-14 , DOI: 10.1021/acs.iecr.9b04496 Brendon J. Doyle 1 , Bernhard Gutmann 2 , Michael Bittel 2 , Thierry Hubler 2 , Arturo Macchi 1 , Dominique M. Roberge 2
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-01-14 , DOI: 10.1021/acs.iecr.9b04496 Brendon J. Doyle 1 , Bernhard Gutmann 2 , Michael Bittel 2 , Thierry Hubler 2 , Arturo Macchi 1 , Dominique M. Roberge 2
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The solid handling ability and flow patterns of a baffleless oscillatory flow coil reactor are investigated and characterized. Previous works in oscillatory flow have been generally conducted in straight channels with various baffled geometries. Solid handling capabilities of the reactor are examined through two reactions, namely, a precipitation reaction and a phase transfer catalysis reaction. In the first reaction, the reactor geometry proved capable of continuously handling liquid–solid suspensions of 5.8 wt % for 5 h and up to 7.9 wt % for 2 h. No signs of clogging were observed during these tests, and the maximum run time of the reactor is currently unknown. However, when gas was formed in the second reaction, rapid system clogging is observed due to a 10-fold decrease in the energy dissipation rate as a result of the pulsation dampening effect by the gas. A broadening of residence time distributions with oscillation intensity is observed and, accordingly, is accompanied by a broadening of solid product particle size distributions. Lower pulsation amplitude and frequencies were capable of keeping solids suspended in the precipitation reaction and may therefore be employed to achieve a tighter residence time and particle size distributions.
中文翻译：
无挡板振荡流盘管反应器中固体的处理和流动特性
研究和表征了无挡板振荡流盘管反应器的固体处理能力和流型。振荡流的先前工作通常是在具有各种折流板几何形状的直通道中进行的。通过两个反应，即沉淀反应和相转移催化反应，检查反应器的固体处理能力。在第一个反应中，反应器的几何形状证明能够连续处理5.8 wt％的液固悬浮液5小时，最高7.9 wt％的液固悬浮液2 h。在这些测试中没有观察到堵塞的迹象，并且反应器的最大运行时间目前未知。但是，在第二反应中生成气体时，由于气体的脉动阻尼作用，能量耗散率降低了10倍，因此观察到系统快速堵塞。观察到具有振荡强度的停留时间分布变宽，因此，伴随着固体产物粒径分布的变宽。较低的脉动幅度和频率能够使固体悬浮在沉淀反应中，因此可以用于获得更紧密的停留时间和粒度分布。
更新日期：2020-01-14
中文翻译：
无挡板振荡流盘管反应器中固体的处理和流动特性
研究和表征了无挡板振荡流盘管反应器的固体处理能力和流型。振荡流的先前工作通常是在具有各种折流板几何形状的直通道中进行的。通过两个反应，即沉淀反应和相转移催化反应，检查反应器的固体处理能力。在第一个反应中，反应器的几何形状证明能够连续处理5.8 wt％的液固悬浮液5小时，最高7.9 wt％的液固悬浮液2 h。在这些测试中没有观察到堵塞的迹象，并且反应器的最大运行时间目前未知。但是，在第二反应中生成气体时，由于气体的脉动阻尼作用，能量耗散率降低了10倍，因此观察到系统快速堵塞。观察到具有振荡强度的停留时间分布变宽，因此，伴随着固体产物粒径分布的变宽。较低的脉动幅度和频率能够使固体悬浮在沉淀反应中，因此可以用于获得更紧密的停留时间和粒度分布。
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