Separation and characterization of squalene and carotenoids derived sulfides in a low mature crude oil
Separation and characterization of squalene and carotenoids derived sulfides in a low mature crude oil
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DOI：
10.1016/j.fuel.2020.117536
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发表时间：
2020-06
期刊：
影响因子：
7.4
通讯作者：
Jianxun Wu;Weilai Zhang;C. Ma;Limin Ren;Su-mei Li;Yahe Zhang;Quan Shi
中科院分区：
文献类型：
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作者：
Jianxun Wu;Weilai Zhang;C. Ma;Limin Ren;Su-mei Li;Yahe Zhang;Quan Shi
渤海湾盆地某原油中有机硫化物（OSC）的分子组成分布异常，该原油中噻吩类硫化物含量极少，但C30和C40硫化物含量丰富。采用甲基化/脱甲基法分离原油中的硫化物，并采用气相色谱-质谱（GC-MS）和傅立叶变换离子回旋共振质谱（FT-ICR MS）对硫化物进行了表征。发现了一系列新的具有角鲨烯生物前体的C30 OSC。在原油中首次发现了来源于二苯乙烯（C33）的OSC，表明烃源岩在早期成岩作用中处于严格的厌氧环境。大多数C40硫化合物被证实是具有β-胡萝卜烷骨架的硫化物。大多数已鉴定的硫化物在其碳骨架内具有含季碳原子的硫杂环戊烷基团或硫杂环丁烷基团。
An unusual distribution on molecular composition of organic sulfur compounds (OSCs) was found in a crude oil from the Bohai Bay Basin (China) that contains negligible thiophenic sulfur compounds but abundant in C30and C40sulfides. The sulfides were separated from the crude oil by methylation/demethylation method and characterized by gas chromatography-mass spectrometry (GC–MS) and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). A novel series of C30OSCs that possess a bio-precursor of squalene were identified. The lexene (C33) derived OSC was also identified for the first time in the crude oil, which indicates a strictly anaerobic condition during the early diagenesis of the source rock. Most C40sulfur compounds were verified to be sulfides having aβ-carotane skeleton. Most identified sulfides possess a thiolane group with a quaternary carbon atom or a thiane group within their carbon skeletons.