INVESTIGATION OF A NOVEL MICROREACTOR FOR ENHANCING MIXING AND CONVERSION
INVESTIGATION OF A NOVEL MICROREACTOR FOR ENHANCING MIXING AND CONVERSION
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研究用于增强混合和转化的新型微反应器
DOI：
10.1080/00986440701690980
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发表时间：
2008
影响因子：
2.5
通讯作者：
K. Varahramyan
中科院分区：
文献类型：
--
作者：
Liang Yu;R. Nassar;Ji Fang;D. Kuila;K. Varahramyan
一种新型的微反应器与网络的欧米茄形微通道的设计，制造和测试，以增强化学物种的混合和反应转化。利用计算流体力学（CFD）模拟研究了欧米茄通道反应器的流动和混合特性。此外，描述颗粒在轴向方向上的运输的随机模型被施加到表征的停留时间分布或随着时间的推移离开微反应器的颗粒的累积概率。流体模拟和随机模型方法都揭示了欧米茄形微通道与直微通道或椭圆形微通道相比的优势。采用溶胶-凝胶法将铁和钴催化剂封装在Ω形微通道中进行费托反应。实验结果表明，Ω形微通道的转化率明显高于传统的直微通道或喇叭形微通道。这些结果与流体模拟和随机模拟结果一致。
A novel microreactor with a network of omega-shaped microchannels has been designed, fabricated, and tested for enhanced chemical species mixing and reaction conversion. Fluidic and mixing properties of the omega channel reactor have been investigated by means of computational fluid dynamic (CFD) simulation. Also, a stochastic model describing particle transport in the axial direction was applied to characterize the residence time distribution or the cumulative probability of a particle exiting the microreactor over time. Both fluidic simulation and stochastic model approaches revealed the advantage of the omega-shaped microchannels as compared to straight or zigzag-shaped microchannels. Fischer-Tropsch reactions were carried out using sol-gel encapsulated iron and cobalt catalysts in the omega-shaped microchannels. The experimental results showed that the conversion rate for the omega-shaped microchannels was considerably higher than that for the conventional straight microchannel or for the zigzag-shaped microchannels. These results were consistent with the fluidic simulation and the stochastic modeling results.