Micromixing Efficiency Enhancement in a Rotating Packed Bed Reactor with Surface-Modified Nickel Foam Packing
Micromixing Efficiency Enhancement in a Rotating Packed Bed Reactor with Surface-Modified Nickel Foam Packing
复制标题
采用表面改性镍泡沫填料提高旋转填充床反应器中的微混合效率
DOI：
10.1021/ie504407a
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发表时间：
2015
影响因子：
4.2
通讯作者：
Jian-Feng Chen
中科院分区：
文献类型：
--
作者：
Guang-Wen Chu;Yin-Jiang Song;Wen-Jie Zhang;Yong Luo;Hai-Kui Zou;Yang Xiang;Jian-Feng Chen
微观混合，即分子尺度的混合，被认为在许多工业过程中发挥着重要作用。在这项工作中，一种新型的表面改性泡沫镍填料（SNP）装载在旋转填料床（RPB）反应器，以提高微观混合效率的研究采用碘化物-碘酸盐反应作为工作系统。实验结果表明，与未改性的泡沫镍填料（NNP）和传统的不锈钢丝网填料（SWP）相比，采用SNP的RPB反应器具有更好的微观混合效率。结果表明，随着转速和液流率的增大，偏析指数（XS）减小，而随着酸浓度和体积比的增大，XS增大。此外，使用基于实验数据的掺入模型计算微观混合时间（tm）。与NNP或SWP相比，SNP的最小tm值（tm = 3.28 ms）小于NNP（tm = 5.68 ms）或SWP（tm = 8.28 ms）。
Micromixing, the mixing at the molecular scale, is believed to play a substantial role in many industrial processes. In this work, a novel surface-modified nickel foam packing (SNP) loaded in a rotating packed bed (RPB) reactor was first proposed to improve the micromixing efficiency studied by adopting the iodide–iodate reaction as a working system. Experimental results showed that the RPB reactor with the SNP presented better micromixing efficiency, compared to the RPB reactor with the nonmodified nickel foam packing (NNP) or traditional stainless steel wire mesh packing (SWP). It could be found that the segregation index (XS) decreased as the rotational speed and liquid flow rate each increased, while it increased with increasing acid concentration and volumetric ratio. Moreover, the micromixing time (tm) was calculated using an incorporation model based on the experimental data. Compared with NNP or SWP, the minimum tm value of SNP (tm = 3.28 ms) is less than that of NNP (tm = 5.68 ms) or SWP (tm = 8....