委内瑞拉减渣供氢热转化中沥青质结构变化研究  

Structural changes of asphaltene in hydrogen donor visbreaking of Venezuelan vacuum residue

作　　者：王齐 郭磊 王宗贤[1] 刘贺 李红艳 沐宝泉[1] 郭爱军[1] 

机构地区：[1]中国石油大学(华东)化学工程学院重质油国家重点实验室,山东青岛266580

出　　处：《燃料化学学报》2013年第9期1064-1069,共6页Journal of Fuel Chemistry and Technology

基　　金：中央高校基本科研业务费专项资金(12CX06041A);中国石油天然气股份有限公司委内瑞拉超重油减黏基础研究(供氢热裂化)项目(W2008E-1502/2)

摘　　要：以委内瑞拉减压渣油为原料,在高压反应釜内考察了反应温度425℃时不同反应时间下常规热转化与供氢热转化反应前后沥青质的平均相对分子质量、元素组成、氢类型分布及其平均结构参数变化。结果表明,与常规热转化相比,反应时间相同时,供氢热转化过程所得残渣油沥青质平均相对分子质量较低,S/C原子比较低,而H/C原子比及活泼性氢量较高。供氢剂能够在热转化过程中降低残渣油沥青质的芳碳率,提高其环烷碳率及环烷环与芳香环的比值,从而延缓其相分离及生焦过程。Hydrogen donor visbreaking and conventional visbreaking of Venezuelan vacuum residue were studied at 425 ℃ for different reaction time in an autoclave.Changes of average molecular w eight,elemental analysis,hydrogen type distribution and average structural parameter of the asphaltenes separated from the feed residues of the tw o processes and their visbroken residuals w ere investigated.The results show ed that in comparison w ith conventional visbreaking at the same reaction time,average molecular w eight and S / C atomic ratio of hydrogen donor visbroken residuals w ere low er,how ever,the H / C atomic ratio and total active hydrogen w ere higher.The hydrogen donor could reduce the aromatic carbon rate of asphaltenes and increase the naphthenic carbon rate and the ratio of naphthenic ring number to aromatic ring number so as to delay the phase separation and coke formation.

关 键 词：沥青质 热转化 平均相对分子质量 元素组成 平均结构参数 

分 类 号：TE624.3[石油与天然气工程—油气加工工程]