摘要
以镇海减压蜡油分别掺炼直馏柴油、催化裂化柴油以及焦化柴油的3种混合油(质量比均为1∶1)为原料,采用高脱氮活性加氢精制催化剂/加氢裂化催化剂体系,并在反应压力为15.7 MPa、裂化段温度为370℃、精制段和改质段氢油体积比分别为800∶1和1 200∶1、精制段和改质段的体积空速分别为1.0 h^-1和1.5 h^-1、控制精制油氮质量分数小于10μg/g的反应条件下,考察掺炼不同种类柴油对加氢裂化产物分布及产品性质的影响。结果表明:掺炼不同种类柴油后,由于混合原料油性质发生明显变化,使得加氢裂化产物分布及产品质量发生明显变化,其中掺炼直馏柴油后可增产高芳烃潜含量的重石脑油,掺炼催化裂化柴油或焦化柴油后可大幅度增加中间馏分油收率,但喷气燃料烟点及柴油十六烷值等性质会明显降低。
Three blends of Zhenhai vacuum gas oil blended with straight-run diesel, FCC LCO and coker diesel(mass ratio of 1∶1) are used as feedstocks. The hydrofining catalyst/hydrocracking catalyst system with high denitrification activity is used. The volume ratio of hydrogen to oil is 800∶1 and 1 200∶1 at the reaction pressure of 15.7 MPa, the temperature of the cracking section is 370 ℃, the volume space velocity of the refined and modified section is 1.0 h^-1 and 1.5 h^-1 respectively, and the mass fraction of nitrogen in the refined oil is controlled to be less than 10 μg/g. The effects of blending different kinds of diesel on the distribution and properties of hydrocracking products are investigated under reaction conditions. The results show that the distribution of hydrocracking products and the quality of hydrocracking products change obviously after blending different kinds of diesel due to the change of the properties of feedstocks. The blending of straight-run diesel can increase the yield of heavy naphtha with high aromatic potential, and the blending of FCC diesel or coker diesel can greatly increase the yield of intermediate distillate, but the product properties such as smoke point of jet fuel and cetane number of diesel can also be significantly worse.
作者
庞宏
Pang Hong(SINOPEC Dalian Research Institute of Petroleum and Petrochemicals,Dalian,Liaoning 116041)
出处
《炼油技术与工程》
CAS
2019年第10期13-16,共4页
Petroleum Refinery Engineering
