Experimental study of gas-liquid mass transfer characteristics in up-flow reactor

被引：0

作者：

Cao J. ^{[1
]}

Zhang S. ^{[1
]}

Zhang T. ^{[2
]}

Yong Y. ^{[3
]}

Yang C. ^{[3
,4
]}

机构：

[1] School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing, 100083, Beijing

[2] Petrochemical Research Institute of PetroChina Company Limited, Beijing

[3] Institute of Process Engineering, Chinese Academy of Sciences, Chinese Academy of Sciences Key Laboratory of Green Process and Engineering, Beijing

[4] University of Chinese Academy of Sciences, Beijing

来源：

Huagong Xuebao/CIESC Journal | 2019年 / 70卷 / 10期

关键词：

Internals; Mass transfer; Particles gradation; Reaction engineering; Reactor; Residual oil hydrogenation;

D O I：

10.11949/0438-1157.20190636

中图分类号：

学科分类号：

摘要：

The upflow reactor is a key pre-reactor of fixed bed residual hydrocracking process, which improves the applicability to residual materials and prolongs the run time of the device. Experimental bench of upflow reactor for the mass transfer process between gas and liquid was built. The industrial catalysts particles with the shape of pentagonal cylinder are packed in the reactor, and air simulates hydrogen and aqueous solution for oil. Based on physical absorption of oxygen into water and chemical absorption into sodium sulfite, the gas-liquid mass transfer characteristics in the upflow reactors are explored under the condition of high gas liquid flux ratio. The influences of superficial gas velocity, superficial liquid velocity, packing particle dimension, internal component, catalyst packing gradation and the ratio of height to diameter on volumetric liquid-side mass transfer coefficient and gas-liquid interfacial area were investigated. The experimental data show that the volumetric liquid-side mass transfer coefficient increases with the increase of gas and liquid superficial velocity. The smaller the particle diameter, the greater the volumetric liquid-side mass transfer coefficient is. Installing proper internal components in the bed layer can enhance gas-liquid mass transfer and the larger aspect ratio of the reactor is beneficial to the gas-liquid mass transfer process. Based on the experimental data, the empirical correlation formula suitable for the volumetric liquid-side mass transfer coefficient and gas-liquid interfacial area of upflow reactor are established, and the maximum fitting errors are 12% and 24% respectively. That the empirical correlations of gas-liquid mass transfer may well describe the characteristics of gas-liquid mass transfer in upflow reactor. © All Right Reserved.

引用

页码：3914 / 3923

页数：9

共 33 条

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