石油学报(石油加工) ›› 2019, Vol. 35 ›› Issue (2): 289-295.doi: 10.3969/j.issn.1001-8719.2019.02.010

• 研究报告 • 上一篇    下一篇

全二维气相色谱-高分辨飞行时间质谱分析LCO中芳烃化合物

王宗霜,王乃鑫,刘泽龙   

  1. 中国石化 石油化工科学研究院, 北京 100083
  • 收稿日期:2018-02-05 修回日期:2018-07-03 出版日期:2019-03-25 发布日期:2019-05-22
  • 通讯作者: 刘泽龙,男,教授级高级工程师,从事石油化学质谱分析方面的研究,Tel:010-82368298, E-mail:liuzl.ripp@sinopec.com E-mail:liuzl1@ripp-sinopec.com
  • 作者简介:第一作者:王宗霜,女,硕士,从事石油化学质谱分析方面的研究;Tel: 010-82368199; E-mail: wangzongshuang@126.com

Analysis of Aromatics in Light Cycle Oil by Comprehensive Two-Dimensional Gas Chromatography Coupled With High Resolution Time of Flight Mass Spectrometry

WANG Zongshuang, WANG Naixin, LIU Zelong   

  1. Research Institute of Petroleum Processing, SINOPEC, Beijing 100083, China
  • Received:2018-02-05 Revised:2018-07-03 Online:2019-03-25 Published:2019-05-22

摘要: 采用全二维气相色谱高分辨飞行时间质谱(GC×GC/HR-TOF MS)对催化裂化轻循环油(LCO)中的芳烃化合物进行详细表征。通过质谱图解析、沸点信息和标准物质保留时间对比,结合仪器高分辨率的优势,确定LCO中的主要芳烃类型及结构。对相同Z值、但类型不同的芳烃在总离子流色谱图中的峰面积进行归一化计算,结合SH/T 0606—2005法测定结果,得到不同类型芳烃在LCO中的含量。结果表明:LCO中除含有Z值为-6的烷基苯类、Z值为-12的萘类和Z值为-18的菲类和蒽类化合物外,还含有Z值为-8的芳烃包含茚满类和四氢萘类化合物,以茚满类为主;Z值为-10的芳烃主要为茚类,含有少量的二环烷基苯类;Z值为-14的芳烃包含联苯类、苊类和二苯并呋喃类化合物,以苊类为主;Z值为-16的芳烃主要为芴类,不含苊烯类化合物。该方法可以提供更为详细的芳烃类型和单体化合物的分子组成信息。

关键词: 催化裂化轻循环油(LCO), 芳烃;类型分布;全二维气相色谱;高分辨飞行时间质谱

Abstract: Comprehensive two-dimensional gas chromatography coupled with high resolution time of flight mass spectrometry (GC×GC/HR-TOF MS) was employed for the characterization of aromatics in light cycle oil (LCO). Identification of aromatic hydrocarbons was carried out by mass spectrum analysis, through comparing with boiling point information and retention time of standard reference materials. High resolution of GC×GC/HR-TOF MS was also used for the above aromatics identification. The main types of aromatics and their chemical structures in LCO were determined. The content of aromatics that had the same Z value but different types, can be obtained by normalized peak areas and hydrocarbon types data which was provided by the SH/T 0606—2005 method. Experimental results show that the aromatics in the LCO include alkylbenzenes (Z=-6), naphthalenes (Z=-12), anthracenes and phenanthrenes (Z=-18). Besides the above aromatics, it was also identified indans and tetralins (Z value of -8), in which indanes are dominant; indenes and a small amount of dinaphthenebenzenes (Z value of -10); biphenyls and acenaphthenes (Z value of -14), in which acenaphthenes are dominant; and fluorenes (Z value of -16). Acenaphthylenes were not detected in the LCO. The developed method can provide detailed information of aromatic types and the molecular composition of monomer compound.

Key words: light cycle oil(LCO), aromatics, type distribution, comprehensive two-dimensional gas chromatography, high resolution time of flight mass spectrometry