Numerical Predication of Cracking Reaction of Particle Clusters in Fluid Catalytic Cracking Riser Reactors

Behavior of catalytic cracking reactions of particle cluster in fluid catalytic cracking （FCC） riser reactors was numerically analyzed using a four-lump mathematical model. Effects of the cluster porosity, inlet gas velocity and temperature, and coke deposition on cracking reactions of the cluster were investigated. Distributions of temperature, gases, and gasoline from both catalyst particle cluster and an isolated catalyst particle are presented. The reaction rates from vacuum gas oil （VGO） to gasoline, gas and coke of individual particle in the cluster are higher than those of the isolated particle, but it reverses for the reaction rates from gasoline to gas and coke. Less gasoline is produced by particle clustering. Simulated results show that the produced mass fluxes of gas and gasoline increase with the operating temperature and molar concentration of VGO, and decrease due to the formation of coke.

在液体的粒子簇的催化裂开的反应的行为催化裂开(FCC ) 起床人反应堆数字地用一个四块的数学模型被分析。簇孔，入口气体速度和温度的效果，和击碎簇的反应上的焦炭免职被调查。温度，气体，和汽油从的分布两个都，催化剂粒子簇和一个孤立的催化剂粒子被介绍。反应从真空气体油(VGO ) 评价到汽油，在簇的单个粒子的气体和焦炭比孤立的粒子的那些高，但是它为到气体和焦炭的从汽油的反应率逆行。更少的汽油被粒子聚类生产。模仿的结果证明气体和汽油的生产集体流动与操作温度和 VGO 的臼齿的集中增加，并且由于焦炭的形成减少。