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首页> 外文期刊>Fuel >Separation and analysis of high range extractable molecules formed during coal pyrolysis using coupled thin layer chromatography-imaging mass spectrometry (TLC-LDI-IMS)
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Separation and analysis of high range extractable molecules formed during coal pyrolysis using coupled thin layer chromatography-imaging mass spectrometry (TLC-LDI-IMS)

机译：使用耦合薄层色谱-成像质谱（TLC-LDI-IMS）分离和分析煤热解过程中形成的高范围可萃取分子

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摘要

A new coupled thin layer chromatography-imaging mass spectrometry method was developed to investigate solvent extracts from a coal. The technique was used to assess the separation of complex molecular structures in a tetrahydrofuran (THF) soluble extract taken from a semi-coke (the solid residue obtained after thermal pre-treatment of coal at 430 degrees C). Thin layer chromatography (TLC) was then used with acetone as a mobile phase and silica as a stationary phase. The component separation was determined by laser desorption/ionisation time-of-flight imaging mass spectrometry (i.e. TLC-LDI-IMS). This provided the molecular weight distributions and spatial concentrations of coal derived structures observed over the TLC plate. In general, acetone lifted and concentrated lighter molecular species in the range of 200-500 Da by up to 55% compared to the THF extract. Structures of 500-1000 Da in molecular weight were lifted, but to lesser extent, distributing these more evenly across the TLC plate. The structures observed in the acetone -concentrate repeated every 12-14 Da.as in a homologous series, similar to previous studies. Residual material remaining in the sample (unascended by the mobile phase) showed repeating structures every 24 Da from 600-3000 Da, also similar to previous work.
机译：开发了一种新的耦合薄层色谱-成像质谱方法来研究煤中的溶剂萃取物。该技术用于评估取自半焦的四氢呋喃（THF）可溶性提取物中复杂分子结构的分离（煤在430摄氏度进行热预处理后获得的固体残留物）。然后使用薄层色谱（TLC），其中丙酮为流动相，二氧化硅为固定相。通过激光解吸/电离飞行时间成像质谱仪（即TLC-LDI-IMS）确定组分分离。这提供了在TLC板上观察到的煤衍生结构的分子量分布和空间浓度。通常，与THF提取物相比，丙酮可将200-500 Da范围内的较轻分子种类提升并浓缩至多55％。分子量为500-1000 Da的结构被提升，但程度较小，将它们更均匀地分布在TLC板上。与以前的研究相似，在丙酮浓缩物中观察到的结构每12-14 Da.as重复一次。样品中残留的残留物质（流动相未覆盖）在600-3000 Da之间每24 Da出现一次重复结构，这与以前的工作类似。

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  • 来源
    《Fuel》 |2017年第may15期|269-279|共11页
  • 作者

    Stanger Rohan; Tran Quang Anh; Smith Nathan; Kennedy Eric; Stockenhuber Michael; Lucas John; Wall Terry;

  • 作者单位

    Univ Newcastle, Dept Chem Engn, Callaghan, NSW 2308, Australia;

    Univ Newcastle, Dept Chem Engn, Callaghan, NSW 2308, Australia;

    Univ Newcastle, Analyt & Biomol Res Facil, Callaghan, NSW 2308, Australia;

    Univ Newcastle, Dept Chem Engn, Callaghan, NSW 2308, Australia;

    Univ Newcastle, Dept Chem Engn, Callaghan, NSW 2308, Australia;

    Univ Newcastle, Dept Chem Engn, Callaghan, NSW 2308, Australia;

    Univ Newcastle, Dept Chem Engn, Callaghan, NSW 2308, Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Solvent extracts; Thin layer chromatography; Coking; Mass spectrometry; Pyrolysis;

    机译：溶剂萃取薄层色谱焦化质谱热解;

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