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Citation: GAI Qingqing, LIU Congyun, ZHAO Shuai, DONG Haifeng, ZHAO Xinying. Separation and identification of Fischer-Tropsch wax by high temperature gas chromatography-mass spectrometry[J]. Chinese Journal of Chromatography, ;2018, 36(3): 303-308. doi: 10.3724/SP.J.1123.2017.11052 shu

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

1.
National Institute of Clean-and-Low-Carbon Energy, Beijing 102209, China;
2.
Beijing Center for Physical and Chemical Analysis, Beijing 100094, China

Received Date: 27 November 2017

Fund Project: Shenhua Group Project (Nos. ST930015SH10, ST930015SH12).

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