Gas-liquid mass transfer in rotating solid foam reactors
Gas-liquid mass transfer in rotating solid foam reactors
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DOI：
10.1016/j.ces.2009.05.047
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发表时间：
2010
影响因子：
4.7
通讯作者：
R. Tschentscher;T. A. Nijhuis;J. Schaaf;B. Kuster;J. J. Schouten-J.
中科院分区：
文献类型：
--
作者：
R. Tschentscher;T. A. Nijhuis;J. Schaaf;B. Kuster;J. J. Schouten-J.
提出了一种基于旋转固体泡沫的三相反应器设计方法，用于精细化工领域。目的是使用固体泡沫作为催化剂载体和搅拌器，以混合气相和液相并产生精细的气泡。介绍了不同固体泡沫搅拌器配置的气液传质数据，并与优化后的拉什顿搅拌器进行了比较。固体泡沫搅拌器采用叶片式和块式设计。两种泡沫反应器设计都在低于600rpm的搅拌速率下工作。采用泡沫叶片设计，气泡主要由气液界面处的湍流产生。大气泡被泡沫叶片击碎。使用泡沫块设计，旋转导致反应器体积的结构分成气含率，流动行为和气泡大小分布强烈不同的部分。这导致气液传质，比用作比较的拉什顿搅拌器高50%。泡沫搅拌器设计可以很容易地在普通三相反应器中使用，并且在进一步优化气液流动模式从而进一步提高传质速率方面显示出很高的潜力。
Three-phase reactor designs based on rotating solid foams for the application in the fine chemical industry are developed. The aim is to use solid foams both as a catalyst support and stirrer in order to mix the gas and liquid phases and create fine gas bubbles. Gas–liquid mass transfer data are presented for different solid foam stirrer configurations and compared to an optimized Rushton stirrer. Solid foam stirrers were developed in a blade and a block design. Both foam reactor designs work at stirring rates below 600rpm. Using the foam blade design, gas bubbles are mainly created by the turbulence at the gas–liquid interface. Large bubbles are broken up by the foam blades. Using a foam block design, rotation leads to the structurization of the reactor volume into sections strongly differing in gas holdup, flow behavior and bubble size distribution. This results in a gas–liquid mass transfer, which is 50% higher than the Rushton stirrer used as comparison. The foam stirrer designs can be easily used in ordinary three-phase reactors and show a high potential for further optimization of the gas–liquid flow pattern and therefore for further increase of the rate of mass transfer.