辽河稠油减压渣油的超临界流体分离与评价  

SEPARATION BY SUPERCRITICAL FLUID AND EVALUATION OF LIAOHE HEAVY CRUDE VACUUM RESIDUUM

作　　者：孙显锋[1] 许志明[1] 孙学文[1] 赵锁奇[1] 徐春明[1] 

机构地区：[1]中国石油大学重质油国家重点实验室,北京102249

出　　处：《石油学报（石油加工）》2010年第4期622-627,共6页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家重点基础研究发展计划"973"项目(2004CB217801;2004CB217803);国家自然科学基金项目(20676148)资助

摘　　要：采用超临界流体萃取分馏技术,将辽河稠油减压渣油分离成14个窄馏分和1个萃余残渣,测定了各个窄馏分的性质和组成,用改进的Brown-Ladner法计算了各个窄馏分和原料的结构参数,预测了窄馏分的二次加工性能,对特征化参数与窄馏分的性质进行了关联。结果表明,随着窄馏分产率的增加,残炭值、S和N及金属元素含量逐渐增加,饱和分质量分数减小,胶质质量分数增大,芳香分质量分数先增大后减小,芳香碳率fA增大,环烷碳率fN和烷基碳率fP逐渐减小。加工性能较好的窄馏分产率为15.18%。建立了辽河稠油减压渣油窄馏分残炭值、芳碳率、环烷碳率、烷基碳率与特征化参数之间的关联式。The Liaohe heavy crude vacuum residuum was separated into 14 narrow fractions and an end-cut by supercritical fluid extraction and fractionation（SFEF） technology.The properties and compositions of narrow fraction were determined.The characteristic index（KH） was used to assess feedstock reactivity and process capability.The average structural parameters（fA,fN,fP） of narrow fractions and vacuum residuum were calculated with modified Brown-Ladner method.The results indicated that as the yield of narrow fraction increased,the content of S and N increased,as well as metal content and the value of residual carbon.When the fraction became heavier,the content of saturates increased and that of resins decreased.Aromatics content firstly increased,reaching its maximum value and then decreased with the yield of narrow fraction increasing.The value of fA increased and that of fN and fP decreased with narrow fraction becoming heavier.The characteristic index KH correlated well with the carbon residue and the structural parameters（fA,fN,fP） of narrow fractions.

关 键 词：辽河稠油减压渣油 超临界 萃取分馏 特征化参数 化学组成 

分 类 号：TE622.1[石油与天然气工程—油气加工工程]