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首页> 外文期刊>Fuel >Semiquantitative analysis of thiophenic compounds in light cycle oil (LCO) using ~(13)C NMR spectroscopy
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Semiquantitative analysis of thiophenic compounds in light cycle oil (LCO) using ~(13)C NMR spectroscopy

机译:使用〜(13)C NMR光谱对轻循环油(LCO)中的噻吩化合物进行半定量分析

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摘要

S-methyltetrafluoroborate salts of the thiophenic compounds (CH_3-S~+ :BF_4~-) present in LCO petroleum fractions were obtained and analyzed by ~1H and ~(13)C NMR spectroscopy. The methylation of the samples was carried out using 99.5 percent ~(13)C enriched methyl iodine, to improve the sensitivity of the technique. The amount of the methylated derivatives was determined by the internal standard method; using dioxane as a reference, 37 sulphur compounds were detected. Among them, benzo[b]thiophene, dibenzo[b,d]thiophene, and several isomers of methyl, dimethyl and trimethyl[b]benzothiophenes were the most abundant. With this research, it was demonstrated that NMR spectroscopy can be used to analyze thiophenic compounds from petroleum medium fractions.
机译:获得了LCO石油馏分中存在的噻吩化合物的S-甲基四氟硼酸盐(CH_3-S〜+:BF_4〜-),并通过〜1H和〜(13)C NMR光谱进行了分析。样品的甲基化使用99.5%的〜(13)C富集的甲基碘进行,以提高该技术的灵敏度。甲基化衍生物的量通过内标法确定;以二恶烷为参考,检测到37种硫化合物。其中,苯并[b]噻吩,二苯并[b,d]噻吩和甲基,二甲基和三甲基[b]苯并噻吩的几种异构体最丰富。通过这项研究,证明了NMR光谱可用于分析石油介质馏分中的噻吩化合物。

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