Backmixing characterization of liquid phase in ebullated bed reactor

被引：0

作者：

Huang Z. ^{[1
]}

Zhu C. ^{[1
]}

Huang Y. ^{[1
]}

Cheng Z. ^{[1
]}

Yang T. ^{[2
]}

Liu J. ^{[2
]}

Fang X. ^{[2
]}

机构：

[1] State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai

[2] SINOPEC Fushun Research Institute of Petroleum and Petrochemicals, Fushun, 113001, Liaoning

来源：

Huagong Xuebao/CIESC Journal | 2017年 / 68卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Backmixing; Ebullated bed reactor; Experimental validation; Numerical simulation; Residence time distribution; Solid holdup; Tanks-in-series with backflow model;

D O I：

10.11949/j.issn.0438-1157.20160967

中图分类号：

学科分类号：

摘要：

The liquid backmixing characteristics were investigated experimentally using pulse tracing technique in an ebullated bed reactor of 7.2 m in height and 0.3 m in diameter. Air and water were used as the gas and liquid phases, respectively. The superficial gas velocity ranged from 0.26 to 12.97 cm·s-1, while the liquid velocity was fixed at 0.86 cm·s-1. The particles of aluminum oxide with an average diameter of 0.4 mm were used as the solid phase. All experiments were carried out under the solids holdup from 0 to 42.9%(vol). The results showed that each response curve demonstrated obvious long tail phenomenon, which implied that there existed evident liquid backmixing in the ebullated bed reactor at different operating conditions. A tanks-in-series with backflow model was adopted to interpret the response data, which showed an excellent agreement between the prediction and experimental data. It also indicated that the number of stages N was 8, while the backmixing coefficient k varied between 1.320 and 4.218. Most of the variances of the predicted model were within +18% of their corresponding experimental values. © All Right Reserved.

引用

页码：630 / 636

页数：6

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