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日用化学工业(中英文) ›› 2026, Vol. 56 ›› Issue (6): 827-832.doi: 10.3969/j.issn.2097-2806.2026.06.016

• 分析与检测 • 上一篇    

全二维气相色谱分析表征重烷基苯中烃组成

李映雪*(),黄爱忠,刘冬,陈丽君,董小宇,曹红   

  1. 中国石化集团金陵石油化工有限责任公司江苏 南京 210033
  • 收稿日期:2025-08-21 修回日期:2026-06-10 出版日期:2026-06-22 发布日期:2026-07-22

Characterization of hydrocarbon composition in heavy alkyl benzene using comprehensive two-dimensional gas chromatography

Yingxue Li*(),Aizhong Huang,Dong Liu,Lijun Chen,Xiaoyu Dong,Hong Cao   

  1. SINOPEC Jinling Petrochemical Corporation, Nanjing, Jiangsu 210033, China
  • Received:2025-08-21 Revised:2026-06-10 Online:2026-06-22 Published:2026-07-22
  • Contact: *E-mail: liyx.jlsh@sinopec.com

摘要:

为了获得重烷基苯中烃组分的详细组成,该研究基于全二维气相色谱技术,对重烷基苯的烃组分进行了定性鉴定与定量分析。构建了基于全二维气相色谱技术的分析体系,通过单次进样即可实现重烷基苯组分中烷烯烃、链烷基苯、一环芳烃及二环芳烃的高效分离,并同步完成各组分的定性鉴别与定量分析。研究结果表明,重烷基苯烃组分主要由烷烃、烯烃、链烷基苯、一环芳烃、二环芳烃组成。应用所建立的方法测定了1,2,3号重烷基苯中烷烯烃、链烷基苯、一环芳烃、二环芳烃的含量,按色谱峰面积计算,1,2,3号重烷基苯中链烷基苯含量最高,质量分数分别为94.05%,84.59%,66.43%。按碳数分布计算,1号重烷基苯谱峰集中在C17~C28,2号重烷基苯谱峰集中在C19~C33,3号重烷基苯谱峰集中在C27~C50。相较于传统一维气相色谱技术,全二维气相色谱凭借其峰容量大与分辨率高特性,在复杂化合物的分离中展现出显著的技术优势与广阔的应用前景,该方法为研究者深入认识重烷基苯中烃组成提供了技术支持。

关键词: 全二维气相色谱, 重烷基苯, 烃族组成, 碳数分布

Abstract:

To obtain detailed information on the hydrocarbon components in heavy alkyl benzene (HAB), in this study, comprehensive two-dimensional gas chromatography (GC×GC) was utilized for qualitative and quantitative analysis of HAB. An analytical system based on GC×GC technology was established, enabling efficient separation according to categories of alkenes-plus-alkanes, linear alkyl benzenes (LAB), monocyclic aromatics, and bicyclic aromatics in HAB through a single injection. Simultaneously, qualitative identification and quantitative analysis of each component were achieved. The results showed that the hydrocarbon fractions of HAB primarily consisted of alkenes-plus-alkanes, LAB, monocyclic aromatics, and bicyclic aromatics. Using the established method, the content of each category, i.e., alkenes-plus-alkanes, LAB, monocyclic aromatics and bicyclic aromatics, was determined for three HAB samples (designated as HAB-1, HAB-2, and HAB-3). Based on chromatographic peak area: LAB exhibited the highest mass fractions in three samples (94.05% in HAB-1, 84.59% in HAB-2, and 66.43% in HAB-3). Based on carbon number distribution: The peaks of HAB-1 mainly distributed in the range of C17-C28; the peaks of HAB-2 mainly distributed in the range of C19-C33; the peaks of HAB-3 mainly distributed in the range of C27-C50. Compared with traditional one-dimensional gas chromatography (GC), GC×GC demonstrated significant technical advantages and broad application prospects in separating complicated mixtures due to its enhanced peak capacity and superior resolution. This method could provide technical support for in-depth understanding of hydrocarbon composition in HAB.

Key words: comprehensive two-dimensional gas chromatography, heavy alkyl benzene, hydrocarbon group composition, carbon number distribution

中图分类号: 

  • TQ423