渣油加氢性质与结构变化规律研究  

Research on properties and structure changes of residue hydrogenation

作　　者：葛海龙 仝玉军 杨涛 Ge Hailong;Tong Yujun;Yang Tao(SINOPEC Dalian Research Institute of Petroleum and Petrochemicals,Dalian,Liaoning 116045)

机构地区：[1]中国石油化工股份有限公司大连石油化工研究院,辽宁省大连市116045

出　　处：《炼油技术与工程》2020年第10期5-9,共5页Petroleum Refinery Engineering

摘　　要：针对SIRUT渣油加氢工艺技术,利用超临界萃取方法对原料及沸腾床单元加氢生成油进行了分离与表征,剖析了沸腾床加氢过程中渣油性质、组成结构的变化规律,揭示了沸腾床加氢反应的机理。与减压渣油原料相比,沸腾床加氢重油各窄馏分硫、氮、金属、残炭等性质均出现显著降低,氢碳原子比由1.75~1.50增加至1.86~1.62,表明沸腾床对劣质渣油具有较好的加氢效果;加氢重油各窄馏分相对平均分子质量由600~1000降低至500~860,较大幅度减小,说明沸腾床加氢的同时发生了裂化反应,实现了重油的轻质化。从结构参数分析结果来看,沸腾床加氢裂化主要是芳香环侧链发生了断裂而产生了短链的轻质油品,但所产生芳香环系缩合度参数H AU/C A平均值由0.76降至0.69,结构缩合性更强,芳香环系取代率更低,后续加工难度较原料有所增加。For the SIRUT residue hydrogenation technology,supercritical extraction is used to separate and characterize the feedstock and hydrogenated oil of ebullated-bed.The change rule of the properties and composition of residue in the ebullated-bed hydrogenation process is analyzed.The mechanism of hydrogenation in ebullated-bed is revealed.Compared with vacuum residuum feedstock,the sulfur content,nitrogen content,metal content and carbon residue of each narrow fraction of heavy oil in ebullated-bed hydrogenation decrease significantly.The ratio of hydrogen to carbon increases from 1.75~1.50 to 1.86~1.62,indicating that the ebullated-bed hydrogenation has a better hydrogenation on inferior residuum.The average relative molecular mass of each narrow fraction of hydrogenated heavy oil decreases from 600~1000 to 500~860.It shows that the cracking reaction occurrs during the ebullated-bed hydrogenation process,and the heavy oil converts into light oil.From the analysis results of structure parameters,the main reason for the ebullated-bed hydrocracking is that the side chain of the aromatic ring breaks and produces light oil with short chain.However,the average value of H AU/C A decreass from 0.76 to 0.69,with stronger structure condensation and lower aromatic ring substitution rate.The subsequent processing is more difficult than that of the feedstocks.

关 键 词：SIRUT技术 渣油加氢 生成油 窄馏分 结构参数 

分 类 号：TE624.5[石油与天然气工程—油气加工工程]