摘要
以加氢柴油为原料,在小型固定流化床装置（FFB）上,采用MLC-500催化剂,在反应温度为420～560℃、剂油质量比为6、质量空速为10 h-1的条件下,考察了反应温度对催化裂化过程中芳烃生成及转化规律的影响.结果表明：加氢柴油经过催化裂化反应后,在不同反应温度下,生成物的芳烃总质量一般可增加9％～12％;整个生成物体系中一环芳烃总质量在试验温度范围内变化不大,但是低于原料中一环芳烃的质量.随反应温度升高,汽油中一环芳烃所占总一环芳烃的比例越来越高,柴油中一环芳烃所占比例越来越低;二环芳烃在试验温度范围内质量有所下降,但是远高于原料中二环芳烃的质量;三环芳烃和焦炭的质量在试验温度范围内都是上升的;环烷烃脱氢生成芳烃是造成芳烃总质量增加的主要原因.
The effect of temperature on the aromatic balance in FCC was simulated using hydrotrea- ted diesel as a feed in a laboratory fixed-fluidized bed （FFB） unit. Test results show that the total a- mount of aromatics in the product increases by about 9%--12%, compared with the hydrotreated diesel feed, at any reaction temperature. The total amount of monocylic aromatics in the product has little changes in the test temperature range, but is lower than that of the feed. With the temperature in- creased, the proportion of the monocyclic aromatics in gasoline is getting higher, but is becoming in- creasingly lower in diesel. The amount of di-aromatics decreases as the temperature increases, however it is significantly higher than that of the feedstock. The amount of tricyclic aromatics and coke increases with temperature. A conclusion can be drawn that the main reason for the total aromatic unbalance is the aromatics generated from naphthene through dehydrogenation.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2014年第2期8-12,共5页
Petroleum Processing and Petrochemicals
关键词
催化裂化
加氢柴油
芳烃
catalytic cracking
hydrotreated diesel
aromatic
