Liquid -solid mass transfer in a rotating trickle -bed reactor: Mathematical modeling and experimental verification
Liquid -solid mass transfer in a rotating trickle -bed reactor: Mathematical modeling and experimental verification
复制标题
旋转滴流床反应器中的液固传质：数学建模和实验验证
DOI：
10.1016/j.ces.2020.115622
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发表时间：
2020
影响因子：
4.7
通讯作者：
Chen Jian-Feng
中科院分区：
文献类型：
--
作者：
Liu Ya-Zhao;Chu Guang-Wen;Li Yan-Bin;Luo Yong;Fan Tian-Xi;Shao Lei;Chen Jian-Feng
液固传质模型在旋转滴流床反应器（RTBR）的设计中具有重要意义，但仍存在不足，RTBR在多相催化反应过程强化方面具有巨大潜力。本文首先建立了考虑润湿效率的RTBR液固传质数学模型。采用外静态持液率作为计算的初始值。通过对单个球上欧拉单元的质量平衡分析，得到了浓度边界层的分布。然后将上述模型扩展到预测RTBR中的液-固传质系数（kLS）。采用铜溶解法测定了KLS，考虑了颗粒直径、转速和液体表观质量流速的影响。kLS的预测值与实验值进行了综合比较，偏差在± 25%以内。
Liquid-solid mass transfer model is significant but deficient for the design of a rotating trickle-bed reactor (RTBR), which has great potential for process intensification of heterogeneous catalytic reactions. In this work, a mathematical model considering the wetting efficiency was first established to describe the liquid-solid mass transfer process in the RTBR. External static liquid holdup was referred to give a reasonable initial value for calculation. The profile of concentration boundary layer was obtained by mass balance analysis of an Eulerian element on a single sphere. The above model was then extended to predict the liquid-solid mass transfer coefficient (kLS) in the RTBR. A copper dissolution method was employed to measure thekLS, considering the effects of particle diameter, rotational speed, and liquid superficial mass velocity. The comprehensive comparison between predicted and experimental values ofkLSwas conducted and deviations were within ±25%.