Effect of Injection Zone Cracking on Fluid Catalytic Cracking

被引：18

作者：

Patel, Rajesh ^{[1
]}

Wang, Dawei ^{[1
]}

Zhu, Chao ^{[1
]}

Ho, Teh C. ^{[2
]}

机构：

[1] New Jersey Inst Technol, Dept Mech & Ind Engn, Newark, NJ 07102 USA

[2] ExxonMobil Res & Engn Co, Corp Strateg Res Labs, Annandale, NJ 08801 USA

来源：

AICHE JOURNAL | 2013年 / 59卷 / 04期

关键词：

fluid catalytic cracking riser; vaporizing spray; feed injection; droplet-solid collision; EVAPORATIVE LIQUID JETS; FREE STREAM-VELOCITY; HEAT-TRANSFER; NUMERICAL-SIMULATION; CROSS-FLOW; VAPORIZATION; MODEL;

D O I：

10.1002/aic.13902

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Fluid catalytic cracking (FCC) is a refining process for converting heavy oils to valuable products such as gasoline and olefins. Modeling of this process is quite challenging. A common assumption has been that vaporization is instantaneously fast and cracking is negligible in the injection zone. Relaxing this assumption, an approach for quantifying the effect of injection zone cracking on FCC performance is developed. The approach combines a Lagrangian description of the spray behavior with an Eulerian modeling of transport-cracking coupling in the FCC riser. Included in the model are droplet vaporization, a four-lump kinetic network, spray penetration trajectory, solid-fluid and solid-solid collisions, and multispray interactions. Parametric studies show that precracking in the injection zone plays an important role in steering the overall performance of an FCC riser. The model developed here can accommodate a large number of reactions, thus, allowing for composition-based modeling of the FCC process. (C) 2012 American Institute of Chemical Engineers AIChE J, 59: 1226-1235, 2013

引用

页码：1226 / 1235

页数：10

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