塞尔维亚喀尔巴阡-巴尔干地区Vrška Čuka无烟煤干酪根中的多芳结构

A.R.H. Juma, B. Todorović, Dragana Stojiljković, Ljubiša Nikolić, Tanja Petrović-Pantić, P. Premović
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摘要

Vrška Čuka无烟煤无机化合物含量为16%,有机质含量为84%,其中干酪根含量82%,沥青含量<2%。x射线衍射(XRD)表明石墨结构的存在。电子自旋共振(ESR)显示出高浓度的多芳顺磁结构(PPS;4.5×10 19个旋转g-1)。傅里叶变换红外光谱(FTIR)显示Vrška Čuka干酪根主要含有芳香族/多芳香族结构。芳香族区分析表明,产物中没有芳香取代基,存在芳香缩聚反应(平均3-4环;≥17个碳原子)。光谱还显示,由于脂肪族的存在,吸收大大减少。大多数脂肪碳以ch3的形式存在(可能在短烷基链中-甲基/亚甲基连接到多芳结构上),如适当吸收的ch3 / ch2值0.7所示。干酪根成熟过程中芳烃的缩聚形成了多芳烃结构。氢碳比(H/C)和氧碳比(O/C)的原子值较低,分别为0.45和0.07。这些分析结果一致表明,该干酪根的成熟导致了芳烃多芳结构的形成。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Polyaromatic structure in the kerogen from anthracite at Vrška Čuka (Carpatho-Balkan region, Serbia)
The Vrška Čuka anthracite shows contents of 16% inorganic compound and 84% organic matter, out of which 82% is kerogen and <2% is bitumen. X-ray diffraction (XRD) indicates the presence of the graphitic structures. The electron spin resonance (ESR) shows a high concentration of polyaromatic paramagnetic structures (PPS; 4.5×10 19 spins g-1). The Fourier transform infrared spectroscopy (FTIR) reveal that the Vrška Čuka kerogen contains predominantly aromatic/polyaromatic structures. Analysis of the aromatic area shows both the absence of aromatic substituents and the presence of aromatic polycondensation (average 3-4 rings; ≥17 carbon atoms). The spectrum also shows considerably reduced absorptions corresponding to the presence of aliphatic groups. Most of the aliphatic carbon is present as CH 3 (probably in short alkyl chains-methyl/methylene attached to polyaromatic structures) as indicated by the CH 3 /CH 2 value 0.7 of the appropriate absorptions. It was suggested that polyaromatic structures were formed by poly-condensation of aromatics during kerogen maturation. Low atomic values of H/C and O/C (0.45 and 0.07) indicate a high degree of genesis (metagenesis). The result of these analyzes are in agreement with each other and show that the maturation of this kerogen led to the formation of polyaromatic structures from aromatic.
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