摘要
以青岛加氢蜡油为原料,在小型固定流化床装置上通过改变剂油比,研究了催化裂化催化剂粒径分布对裂化产品选择性的影响。研究结果表明:随着剂油比的增加,四种不同粒径分布催化剂的转化率逐渐增加;粒径在40～80μm的催化剂具有较优的干气、焦炭和汽油选择性;粒径小于40μm的催化剂尽管微反活性最高,但重油转化能力最差;随着转化率的增加,汽油中正构烷烃和芳烃的含量逐渐增加,烯烃和环烷烃的含量逐渐减少。
The effects of catalyst particle size distributions on the selectivity of catalytic cracking products were studied on a fixed fluidized bed device using hydrogenated VGO as feedstock and by changing the catalyst to oil （C/O） ratio to reach various conversions. The results show that with the increase of C/O ratio, the conversions of the four catalysts having various particle size distributions increase;cat- alyst having particle size within 40 80 μm exhibited the best selectivity to dry gas, coke and gasoline. Although catalyst with particle size less than 40 μm has the highest micro-activity among the four catalysts, yet its crackability of bottoms is the worst. With the increase of conversion, the contents of paraffin and aromatic hydrocarbon in gasoline increase and the contents of olefin and cycloalkane decrease.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2011年第2期42-46,共5页
Petroleum Processing and Petrochemicals
关键词
催化裂化
催化剂
粒径分布
选择性
catalytic cracking
catalyst
particle size distribution
selectivity
