摘要
通过对转油线内结焦物的组成、结构及烃类热反应行为的分析，提出重芳烃、胶质、沥青康的缩合反应和二烯烃的聚合环化反应是造成转油线结焦的主要原因，认为转油线结焦的初期金属催化生焦起主要作用，以后因油气在器壁上冷凝，造成易生焦组分在高温下长时间的停留，最终转化成焦炭。
According to the composition and structure of coke in FCC transfer line and the ther-mal reactions of hydrocarbons, it is explained that the formation of coke in transfer line is resulted from the condensations of heavy aromatics, resins and asphaltenes as well as the polymerization and cyclization of diolefins. It is also Inferred that the initial coking is caused by the metal catalysis and the subsequent coking is formed from the coke precursors such as diolefins, polynuclear aromatics, resins and asphaltenes in the condenced liquid.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
1997年第5期43-46,共4页
Petroleum Processing and Petrochemicals
关键词
催化裂化
转油线
结焦
石油
catalytic cracking, transfer line, coking, cause
