竞争吸附对催化裂化反应过程的影响  

Effect of competitive adsorption on catalytic cracking reaction

作　　者：刘银东[1] 李泽坤[1] 王刚[1] 徐春明[1] 高金森[1] 

机构地区：[1]中国石油大学(北京)重质油国家重点实验室,北京102249

出　　处：《化工学报》2008年第11期2794-2799,共6页CIESC Journal

基　　金：国家杰出青年科学基金项目(20725620)~~

摘　　要：以大港焦化蜡油为原料,利用催化裂化工业平衡剂LBO-16在小型固定流化床实验装置上研究了竞争吸附效应对催化裂化反应的影响,并对特征组分竞争吸附行为进行分析。结果表明,竞争吸附效应对催化裂化转化率影响很大,通过提高剂油比可以基本消除竞争吸附对反应过程的影响。原料中含氮化合物及稠环烃类化合物竞争吸附效应很强,阻滞烃类裂化反应的正常进行,是催化裂化过程快速生焦的重要原因。随着竞争吸附效应的减弱,脱氢缩合反应比例下降,氢转移反应显著加强。The effect of competitive adsorption on catalytic cracking reaction of Dagang coking gas oil over commercial equilibrium catalysts LBO-16 was investigated in a confined fluidized bed reactor,and the competitive adsorption behavior of the characteristic ingredients was analyzed.The experimental results showed that competitive adsorption had strong effect on catalytic cracking conversion,but with the increase of mass ratio of catalyst to oil,the effect of competitive adsorption on catalytic cracking can be eliminated.Nitrogen compounds and polycyclic aromatic hydrocarbons in the feedstock had strong competitive adsorption effect that interfered catalytic cracking reaction of hydrocarbons and was an important cause of fast coke formation.With weakening of competitive adsorption behavior,the rate of dehydro-condensation reaction decreased,and hydrogen transfer reaction was obviously strengthened.

关 键 词：催化裂化 竞争吸附 焦化蜡油 氮化物 稠环芳烃 

分 类 号：TE624.4[石油与天然气工程—油气加工工程]