油页岩有机质的逐级热溶解聚及产物特性

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。

Sequential thermal dissolution of Yilan oil shale organic matter and properties of products

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.