Liquid–Solid Mass Transfer for Microchannel Suspension Catalysis in Gas–Liquid and Liquid–Liquid Segmented Flow
Liquid–Solid Mass Transfer for Microchannel Suspension Catalysis in Gas–Liquid and Liquid–Liquid Segmented Flow
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DOI：
10.1021/ie504523y
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发表时间：
2015-04
影响因子：
4.2
通讯作者：
Anne-Kathrin Liedtke;Frederik Scheiff;F. Bornette;R. Philippe;D. Agar;C. Bellefon
中科院分区：
文献类型：
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作者：
Anne-Kathrin Liedtke;Frederik Scheiff;F. Bornette;R. Philippe;D. Agar;C. Bellefon
本文研究了水平气-液（G-L）和液-液（L-L）“浆状泰勒”流的液-固外传质特性。催化剂颗粒（dP = 40-200 μm）在圆柱形毛细管（dT = 1.6-1.65 mm）中以悬浮液的形式在含水液相中输送，并由于液塞中存在的再循环模式而保持运动。离子交换颗粒用于跟踪稀氢氧化钠溶液的中和，以估计传质系数。考察了两相流速度、颗粒粒径、段塞长度和惰性物性等因素的影响。液-固传质系数不受段塞长度的影响，粒径对大于50 μm的颗粒也没有影响。传质系数主要取决于总流速和液相中固体颗粒的充分循环。对于甲苯-水L-L泰勒流，部分...
In this work, the external liquid–solid mass transfer properties of horizontal gas–liquid (G–L) and liquid–liquid (L–L) “slurry Taylor” flow are investigated. The catalytic particles (dP = 40–200 μm) are transported in a cylindrical capillary (dT = 1.6–1.65 mm) in the form of a suspension in the aqueous liquid phase and kept in motion due to the recirculation patterns present in the liquid slugs. Ion exchange particles are used to follow the neutralization of dilute sodium hydroxide solutions in order to estimate the mass transfer coefficients. The influence of two phase velocity, particle size, slug length, and inert physical properties was investigated. No influence of slug length on the liquid–solid mass transfer coefficient was detected, and the particle size appears likewise to have no effect for particles larger than 50 μm. The mass transfer coefficient depends mainly on overall flow velocity and an adequate circulation of solid particles in the liquid phase. For toluene–water L–L Taylor flow, parti...