摘要
采用能谱分析方法确定催化裂化油浆结垢物质为无机垢和有机垢的混合物。随着反应温度和反应时间的增加,油浆反应产物中的沥青质及甲苯不溶物含量呈明显上升趋势,表明体系的结垢趋势及结垢程度均不断增加。当反应温度为390-410℃、反应时间为6 h时,沥青质及甲苯不溶物的含量上升最快,这是由于此温度区间内结垢倾向加剧、黏性增加、油浆浓缩、生焦性能增强,使得油浆结垢速度最快、结垢量最大。反应压力的变化对以固-液相反应为主的生垢反应影响不明显。结合实验室考察结果,绘制了催化油浆安全加工的操作域,在操作域内催化油浆的结焦倾向很低,不会影响装置正常运转。
It is concluded from energy dispersive spectrum（ EDS） analysis of FCC slurry that the foul is composed of organic and inorganic substances. As reaction temperature and residence time increasing,the content of asphaltene and TI in the reactant of slurry oil system is increased obviously,which indicates that the fouling tendency and fouling extent of the system have also been elevated. Furthermore,the contents of asphaltene and TI increase rapidly on the conditions of 390 - 410 ℃ reaction temperature and 6 h reaction time.This is because that,in this temperature range,the fouling tendency is accelerated,the slurry oil is concentrated,the coking formation is enhanced,which maximize the fouling speed and fouling rate. The variations of reaction pressure have little impact on the fouling reaction of liquid-solid phase. With the reference of laboratory data,the safe operating range for FCC slurry processing is developed. The coking tendency of FCC slurry is the lowest in this operating range,and there is no impact on the process unit.
出处
《炼油技术与工程》
CAS
2016年第9期31-34,共4页
Petroleum Refinery Engineering
关键词
催化裂化油浆
结垢
反应机理
操作域
FCC slurry
fouling
reaction mechanism
operating range
