Investigation of the liquid recycle in the reactor cascade of an industrial scale ebullated bed hydrocracking unit

Eduard Manek; Juma Haydary

doi:10.1016/j.cjche.2018.06.023

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Investigation of the liquid recycle in the reactor cascade of an industrial scale ebullated bed hydrocracking unit

Fluid Dynamics and Transport Phenomena | Updated：2026-01-06

- Investigation of the liquid recycle in the reactor cascade of an industrial scale ebullated bed hydrocracking unit
- Investigation of the liquid recycle in the reactor cascade of an industrial scale ebullated bed hydrocracking unit
- 中国化学工程学报（英文版） 2019年27卷第2期页码：298-304
- Affiliations：
  
  Institute of Chemical and Environmental Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, Bratislava,Slovakia,812 37
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2018.06.023
  中图分类号：
- 纸质出版：2019
- Accepted：
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Eduard Manek, Juma Haydary. Investigation of the liquid recycle in the reactor cascade of an industrial scale ebullated bed hydrocracking unit[J]. 中国化学工程学报（英文版）, 2019,27(2):298-304.

Eduard Manek, Juma Haydary. Investigation of the liquid recycle in the reactor cascade of an industrial scale ebullated bed hydrocracking unit[J]. Chin.J.Chem.Eng., 2019, 27(2): 298-304.
Eduard Manek, Juma Haydary. Investigation of the liquid recycle in the reactor cascade of an industrial scale ebullated bed hydrocracking unit[J]. 中国化学工程学报（英文版）, 2019,27(2):298-304. DOI： 10.1016/j.cjche.2018.06.023.

Eduard Manek, Juma Haydary. Investigation of the liquid recycle in the reactor cascade of an industrial scale ebullated bed hydrocracking unit[J]. Chin.J.Chem.Eng., 2019, 27(2): 298-304. DOI： 10.1016/j.cjche.2018.06.023.

摘要

Abstract

One of the commercial means to convert heavy oil residue is hydrocracking in an ebullated bed. The ebullated bed reactor includes a complex gas-liquid-solid backmixed system which attracts the attention of many scientists and research groups. This work is aimed at the calculation of the internal recycle flow rate and understanding its effect on other parameters of the ebullated bed. Measured data were collected from an industrial scale residual hydrocracking unit consisting of a cascade of three ebullated bed reactors. A simplified block model of the ebullated bed reactors was created in Aspen Plus and fed with measured data. For reaction yield calculation

a lumped kinetic model was used. The model was verified by comparing experimental and calculated distillation curves as well as the calculated and measured reactor inlet temperature. Influence of the feed rate on the recycle ratio (recycle to feed flow rate) was estimated. A relation between the recycle flow rate

pump pressure difference and catalyst inventory has been identified. The recycle ratio also affects the temperature gradient along the reactor cascade. Influence of the recycle ratio on the temperature gradient decreased with the cascade member order.

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