Abstract:

Yilan oil shale organic matter was depolymerized by sequential thermal dissolution in tetralin.The soluble portions (SP) were analyzed by GC-MS and classified into different components,and the residues were analyzed by FT-IR and ¹³C NMR.Based on the above information,Yilan oil shale organic molecular structure was revealed at a molecular level.The results indicated that Yilan oil shale organic matter could be depolymerized by sequential thermal dissolution from 200℃ to 400℃,the yields of soluble portions at 200,300,350,375 and 400℃ were 8.8%,9.9%,18.5%,19.2% and 23.4%,respectively,and the total yield was 79.8%.In the total soluble fraction,aliphatic hydrocarbon compounds accounted for more than 36.9%(including 27.4%n-alkanes and 8.7% branched alkanes),alcohols/phenol 5.5%,aromatic hydrocarbon 32.0%,ketones 12.7%,ether/ester 5.4%,and the other compounds 7.5%.The order of yield of compounds is as follow:aliphatic hydrocarbons > aromatic compounds > ketones > phenols > alcohols/esters.The identified n-alkanes in soluble portions have a distribution range from C₁₄ to C₃₀ with two maximum values at C₁₆ and C₂₆.

Key words: fuel, oil shale, solvent extraction, sequential thermal dissolution, depolymerization, organic compounds, structure

摘要：

依兰油页岩有机质经过四氢萘逐级热溶解聚，热溶解聚物分别经过GC-MS检测并归纳分类，并结合热溶解聚残渣的FT-IR和¹³C NMR分析结果，旨在从分子水平上揭示依兰油页岩有机分子结构特征。结果表明，依兰油页岩有机质经过200~400℃逐级热溶解聚后，200、300、350、375和400℃温度条件下逐级热溶解聚物的收率分别为8.8%、9.9%、18.5%、19.2%和23.4%，总收率达79.8%。在可溶性组分中，脂肪烃化合物占比为36.9%（其中直链烷烃27.4%，支链烷烃8.7%），酚/醇类占比为5.5%，芳香烃占比为32.0%，酮类占比为12.7%，醚/酯类占比为5.4%，其他化合物占比为7.5%。呈现脂肪烃>芳烃化合物>酮类>酚/醇>酯/醚的规律分布状态，其中27.4%直链烷烃中碳数分布在14~30并在C₁₆和C₂₆呈现两个峰值。

关键词: 燃料, 油页岩, 溶剂萃取, 逐级热溶, 解聚, 有机化合物, 结构