Abstract

Hydrodynamics, mass transfer and reaction rates were studied experimentally in a microreactor that had a square channel with a size of 1.0 × 1.0 mm × mm. The gas-limited hydrogenation of alpha-methylstyrene was chosen as the model reaction. The experiments covered superficial two-phase velocities in the range from 0.05 to 0.30 m/s and gas holdups at the channel inlet between 0.25 and 0.94. Overall hydrogen mass transfer elevated mainly with two-phase velocity and reached values between 0.1 and 1.2 1/s. Novel mass transfer equations were derived because the film theory which had often been applied was not applicable in this case. These equations are based on Reynolds, Schmidt and Sherwood numbers as well as the specific interfacial areas from the hydrodynamic observations.

中文翻译：

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三相微反应器中流体动力学，传质和反应速率的同时检测

摘要

在具有大小为1.0×1.0 mm×mm的方形通道的微型反应器中，通过实验研究了流体动力学，传质和反应速率。选择α-甲基苯乙烯的气体限制加氢作为模型反应。实验覆盖了从0.05至0.30 m / s的表观两相速度，通道入口处的气体滞留率在0.25至0.94之间。总氢质量传递主要以两相速度升高，并达到0.1至1.2 1 / s之间的值。推导了新的传质方程式，因为经常应用的薄膜理论不适用于这种情况。这些方程式基于雷诺数，施密特数和舍伍德数以及流体动力学观测中的特定界面区域。