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首页> 外文期刊>American Journal of Analytical Chemistry >Applicability of Static Supercritical Carbon Dioxide Extraction in Biogeochemical Characterization of Oil Shales
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Applicability of Static Supercritical Carbon Dioxide Extraction in Biogeochemical Characterization of Oil Shales

机译：静态超临界二氧化碳萃取在油页岩生物地球化学表征中的适用性

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摘要

This study aimed at the assessment of applicability of static supercritical carbon dioxide extraction method (SFE) in biogeochemical characterization of oil shales as an alternative to the standard Soxhlet extration. A comparative investigation on yields and compositions of the solvent soluble bitumoids and their constituents extracted from Estonian Kukersite and Dictyonema oil shales by using Soxhlet extraction method (SEM) and static CO2 supercritical fluid extraction in an autoclave at varied subpyrolysis temperatures was carried out. Resulting from TLC- and GC-MS-analyses, aliphatic and aromatic hydrocarbons and neutral oxygen compounds were separated and identified. For the first time, in the composition of the Kukersite bitumoid, homologous series of n-alkanones-3 to n-alkanones-7 were detected. The extracts obtained were similar in both group and individual composition, and geochemical parametres calculated on the basis of aliphatic hydrocarbons including that made static SFE applicable to geochemical investigation of oil shales.
机译：本研究旨在评估静态超临界二氧化碳萃取方法（SFE）在油页岩生物地球化学表征中作为标准索氏抽提的替代方法的适用性。在不同的亚热解温度下，采用索氏提取法（SEM）和高压静态CO2超临界流体萃取法，从爱沙尼亚古克力石油和狄克塞内玛油页岩中提取溶剂可溶性沥青质及其成分，进行了产量和组成的比较研究。根据TLC和GC-MS分析，分离并鉴定了脂肪族和芳香族烃以及中性含氧化合物。在Kukersite沥青的组成中，第一次检测到n-链烷酮3至n-链烷酮7的同源序列。所得提取物在组别和单个组成上都相似，并且基于脂肪烃计算的地球化学参数，包括使静态SFE适用于油页岩地球化学研究的参数。

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