Abstract Some aromatic sulfur compounds contained in vacuum gas oils are known to be very refractory to hydrotreatment. Thus, a better knowledge of these molecules would help to improve hydrodesulfurization efficiency by designing targeted catalysts or choosing adequate operating conditions for hydrotreatment process. The characterization of such compounds using advanced analytical techniques such as Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR MS) can give more information about the aromaticity and the number of carbon atoms of these refractory molecules. One vacuum gas oil feed and six hydrotreated samples obtained from pilot plant tests at several temperatures or using different catalysts have been analyzed using APPI(+)-FT-ICR MS. The differences of the aromaticity and number of carbon atoms among the several hydrotreated samples have been investigated to identify the effects of catalysts and temperatures over hydrotreatment process. Principal Component Analysis was used to explore the obtained data and put forward the variables explaining most of the variance between the hydrotreated samples.

中文翻译：

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使用 FT-ICR MS 表征硫化合物：更好地理解真空瓦斯油加氢脱硫过程

摘要 减压瓦斯油中含有的一些芳香族硫化合物对加氢处理非常难处理。因此，更好地了解这些分子将有助于通过设计目标催化剂或为加氢处理过程选择适当的操作条件来提高加氢脱硫效率。使用傅立叶变换离子回旋共振质谱 (FT-ICR MS) 等先进分析技术对此类化合物进行表征，可以提供有关这些难熔分子的芳香性和碳原子数的更多信息。已经使用 APPI(+)-FT-ICR MS 分析了在几个温度下或使用不同催化剂从中试工厂测试中获得的一种真空瓦斯油进料和六个加氢处理样品。研究了几种加氢处理样品之间的芳香性和碳原子数的差异，以确定催化剂和温度对加氢处理过程的影响。主成分分析用于探索获得的数据并提出解释加氢处理样品之间大部分差异的变量。