论文部分内容阅读
利用小型提升管催化裂化实验装置对工业提升管中的催化裂化和热裂化反应进行了实验模拟研究,考察了反应停留时间、反应温度和剂油比对催化裂化和热裂化反应的影响,在此基础上对催化裂化反应工艺条件进行了分析。结果表明,缩短反应停留时间和提高剂油比可有效抑制提升管反应器中热裂化反应的发生,提高轻质油收率;提高反应温度虽然可在一定程度上提高轻质油收率,但反应温度过高会使热裂化反应加剧,从而使产物分布变差;当采用高温、大剂油比操作时,缩短反应时间,尽量消除提升管反应后期的热裂化反应,是改善催化裂化产物分布的关键。
The experimental study of catalytic cracking and thermal cracking in industrial riser was carried out by using a small riser FCC unit. The effects of reaction residence time, reaction temperature and catalyst / oil ratio on the catalytic cracking and thermal cracking reactions were investigated. Based on the catalytic cracking reaction process conditions were analyzed. The results showed that shortening reaction residence time and increasing the ratio of oil to solvent could effectively suppress the occurrence of thermal cracking reaction in riser reactor and increase the yield of light oil. Although increasing the reaction temperature could improve the yield of light oil to a certain extent, When the reaction temperature is too high, the thermal cracking reaction will aggravate, which will lead to poor product distribution. When using high temperature and large dosage of oil to operate, the reaction time will be shortened and the thermal cracking reaction in the late stage of the riser will be eliminated as far as possible to improve the distribution of the catalytic cracking products key.