摘要
采用欧拉-欧拉方法对催化裂解提升管反应器内的气固两相流动与催化裂解反应过程进行了研究,构建了12集总反应动力学模型模拟裂解反应过程,并使用焦炭生成量与催化剂质量比例函数来模拟催化剂失活动力学;考察了提升管轴向和径向的产物分布特征,分析了剂油比CTO、原料中沥青质含量和入口蒸气量对产物的影响。结果表明:产物和催化剂有壁面富集现象;随着CTO增大,反应器出口柴油比例减小,烯烃比例增大;原料中沥青质增大,出口烯烃产量降低,但影响较小;入口蒸气量越高,烯烃出口产量越低。
The gas-solid two-phase flow and the catalytic cracking reaction process in the catalytic cracking riser reactor was studied by Euler-Euler method, and a 12-lumped reaction kinetic model was used to represent the catalytic cracking reaction network and catalyst deactivation was described by the mass ratio of coke to catalyst. The product distribution in the axial and radial direction and the influence of catalyst-to-oil ratio(CTO),asphaltene content and steam flow rate in the feedstock on products were studied. The results show that catalysts and products were enriched near the wall;the proportion of diesel oil decrease and the proportion of olefin increase with the increase of CTO;the proportion of olefins decreased slightly with the increase of asphaltene in feedstock;the higher the amount of inlet steam, the lower the output of olefins.
作者
贺翔宇
王景效
许建良
刘海峰
龚剑洪
HE Xiang-yu;WANG Jing-xiao;XU Jian-liang;LIU Hai-feng;GONG Jian-hong(Shanghai Coal Gasification Engineering Technology Research Center,East China University of Science and Technology,Shanghai 200237,China;SINOPEC Research Institute of Petroleum Processing,Beijing 100083,China)
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2021年第5期829-839,共11页
Journal of Chemical Engineering of Chinese Universities
关键词
催化裂解
提升管
模拟
计算流体力学
catalytic cracking
riser reactor
simulation
computational fluid dynamics
