Effect of terminator injection on catalytic cracking reactions in FCC riser

WANG Min; WU Yingya; LAN Xingying; GAO Jinsen

doi:10.11949/j.issn.0438-1157.20160438

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Effect of terminator injection on catalytic cracking reactions in FCC riser

更新时间：2025-12-10

- Effect of terminator injection on catalytic cracking reactions in FCC riser
- CIESC Journal Issue 8, Pages: 3191-3201(2016)
- 作者机构：
  
  中国石油大学(北京)重质油国家重点实验室,北京,102249
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20160438
  CLC： Q021.1
- Online First：05 August 2016，
  
  Published：05 August 2016
- 稿件说明：
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WANG Min, WU Yingya, LAN Xingying, et al. Effect of terminator injection on catalytic cracking reactions in FCC riser[J]. CIESC Journal, 2016, (8): 3191-3201.
DOI：

WANG Min, WU Yingya, LAN Xingying, et al. Effect of terminator injection on catalytic cracking reactions in FCC riser[J]. CIESC Journal, 2016, (8): 3191-3201. DOI： 10.11949/j.issn.0438-1157.20160438.

摘要

通过对催化裂化提升管注入终止剂前后的工况进行数值模拟，研究了终止剂注入对提升管内速度分布、催化剂颗粒浓度分布、温度分布以及组分浓度分布的影响，考察了不同注入量以及注入高度的终止剂在提升管内的作用区域及其对裂化反应的影响。研究表明，终止剂的注入大幅提升了提升管内的油气速度，降低了催化剂浓度、油气和催化剂的温度，使得提升管内原料的裂化程度降低，二次反应减少。且不同注入量和注入高度的作用区域不同，对裂化反应的影响不同，应根据实际工况进行分析。

Abstract

The flow

heat transfer and reaction behaviors in the fluid catalytic cracking (FCC) riser before and after the injection of terminator were simulated by the computational fluid dynamics (CFD) method. Distributions of velocity

solid catalyst volume fraction

temperature

and species concentration in FCC riser were obtained after the injection of terminator. Besides

the action zone of the terminator and the effect on cracking reactions were analyzed with different mass fraction and teeming height of the terminator. The simulation results showed that with injection of the terminator

the velocity of oil gas was increased but volume fraction and temperature of the catalyst as well as temperature of the oil gas were decreased. The change in flow and the heat transfer caused the reduction in degree of the cracking reactions and the secondary reaction of oil gas in the riser

which resulted in a higher yield of gasoline and lower yields of dry gas

LPG and coke. The action zone and the effect on cracking reaction varied with different mass fraction and teeming height of the terminator

which should be evaluated by actual process conditions.

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