石油炼制与化工 ›› 2019, Vol. 50 ›› Issue (8): 96-102.

• 基础研究 • 上一篇    下一篇

不同重油的正戊烷及正庚烷沥青质性质对比

范勐1,赵锁奇2,孙学文2,许志明2   

  1. 1. 北部湾大学石油与化工学院
    2. 中国石油大学(北京)重质油国家重点实验室
  • 收稿日期:2019-02-19 修回日期:2019-03-23 出版日期:2019-08-12 发布日期:2019-08-27
  • 通讯作者: 范勐 E-mail:fanmeng@qzhu.edu.cn
  • 基金资助:
    广西高校北部湾石油天然气资源有效利用重点实验室基金资助项目;2018年度广西高校中青年教师基础能力提升项目

COMPARISON OF PROPERTIES OF C5 and C7 ASPHALTENES FROM DIFFERENT HEAVY OILS

    

  1.  
  • Received:2019-02-19 Revised:2019-03-23 Online:2019-08-12 Published:2019-08-27
  • Supported by:
     

摘要: 以中东减压渣油(MEVR)、加拿大油砂沥青(VTB)、辽河稠油减压渣油(LHVR)、委内瑞拉常压渣油及减压渣油(VAR、VVR)等5种重油为原料,利用溶剂沉淀法制备正戊烷及正庚烷沥青质,采用元素组成、GPC、1H-NMR、13C-NMR、XRD、SEM等分析方法和手段进行沥青质性质评价以考察其差异性。结果表明,五种重油的C5沥青质、C7沥青质在含量、分子结构、平均结构单元数目、分子大小、微观结构形态等方面差异明显。沥青质芳碳率在0.47~0.54之间,VTB、LHVR沥青质中参与有序堆积结构的芳香碳较少,而MEVR,VAR,VVR沥青质中该部分芳香碳则相对较多。

关键词: 重油, 沥青质, 正戊烷, 正庚烷

Abstract: Asphaltenes were prepared with n-pentane and n-heptane from Middle East vacuum residue (MEVR), Canada oil sand vacuum topped bitumen (VTB), China Liaohe vacuum residue (LHVR), Venezuela atmospheric residue (VAR), and Venezuela vacuum residue (VVR). Those asphaltenes were compared and analyzed by element analysis, GPC, 1H-NMR, 13C-NMR, XRD and SEM techniques. The results showed that C5 asphaltene and C7 asphaltene of five heavy oils have obvious differences in content, molecular structure, average number of structural units, molecular size and microstructure. Aromatic carbon ratio of those asphaltene ranged from 0.47 to 0.54. The C7 asphaltenes of VTB and LHVR were less in aromatic carbon in ordered stacking structure, while more aromatic carbon was in MEVR, VAR and VVR asphaltene structures.

Key words: heavy oil, asphaltene, n-pentane, n-heptane

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