色谱

色谱 ›› 2018, Vol. 36 ›› Issue (3): 303-308.DOI: 10.3724/SP.J.1123.2017.11052

• 研究论文 • 上一篇    下一篇

高温气相色谱和高温气相色谱-质谱法对费托合成蜡的分离和鉴定

盖青青1, 刘聪云1, 赵帅1, 董海峰2, 赵新颖2   

  1. 1. 北京低碳清洁能源研究所, 北京 102209;
    2. 北京市理化分析测试中心, 北京 100094
  • 收稿日期:2017-11-27 出版日期:2018-03-08 发布日期:2018-04-04
  • 通讯作者: 盖青青,E-mail:gaiqingqing@nicenergy.com;赵新颖,E-mail:zhaoxinying@sina.com
  • 基金资助:

    Shenhua Group Project (Nos. ST930015SH10, ST930015SH12).

Separation and identification of Fischer-Tropsch wax by high temperature gas chromatography-mass spectrometry

GAI Qingqing1, LIU Congyun1, ZHAO Shuai1, DONG Haifeng2, ZHAO Xinying2   

  1. 1. National Institute of Clean-and-Low-Carbon Energy, Beijing 102209, China;
    2. Beijing Center for Physical and Chemical Analysis, Beijing 100094, China
  • Received:2017-11-27 Online:2018-03-08 Published:2018-04-04
  • Supported by:

    Shenhua Group Project (Nos. ST930015SH10, ST930015SH12).

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摘要：

费托合成蜡是费托合成反应中的重要产物之一。采用高温气相色谱与冷柱头进样相结合的方式，建立了一种分离分析费托合成蜡的气相色谱方法。该方法无需对费托合成蜡进行预处理，使用氦气为载气，选用更长的高温色谱柱，具有平稳的色谱基线，对费托合成蜡中正构烷烃和其他未知组分有很好的分离效果，能够洗脱费托合成蜡中碳数大于C90的重组分。用高温气相色谱-质谱法对费托合成蜡馏分进行定性分析，其组分有烷烃、烯烃和含氧化合物。该方法对了解费托合成蜡组分的详细信息和费托合成工艺的开发有重要意义。

关键词: 费托合成蜡, 高温气相色谱, 正构烷烃分离, 质谱

Abstract:

Fischer-Tropsch (FT) wax is an important material produced from FT synthesis reactions. In this study, an improved separation and identification method for FT wax by high temperature gas chromatography (HTGC) coupled with cold-on-column (without pretreatment) was developed. In our improved separation procedure, the carrier gas was changed to helium and a long chromatographic column was adapted for use at high temperature. The n-alkanes in FT wax were well separated from other unknown components and the heavy components with carbon numbers higher than C90 could be eluted. Unknown components of the FT wax fraction were confirmed as alkanes, alkenes and oxygenated compounds by using HTGC-mass spectrometry. These results improve our understanding of the FT synthesis process and increase our detailed knowledge of FT products.

Key words: n-alkane separation, Fischer-Tropsch wax, high temperature gas chromatography (HTGC), mass spectrometry (MS)

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