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化工学报  2015 

利用GC-MS与NMR技术研究干馏终温对桦甸页岩油组成性质的影响

DOI: 10.11949/j.issn.0438-1157.20150210, PP. 2670-2677

Keywords: 页岩油,热解,气相色谱质谱,核磁共振,碳氢化合物,化学结构

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Abstract:

通过控制桦甸油页岩干馏终温,得到5个不同终温下页岩油样品,对各页岩油样按沸点300℃进行切割,其中轻质油馏分(300℃)进行了1H和13C核磁共振波谱分析,对谱图积分获得其氢、碳分布情况,研究了干馏终温对页岩油化学结构的影响。结果显示,轻质油组成中脂肪族化合物占绝大部分,其中正构烷烃、α-烯烃和正构醛、醇三者具有同源性,均由烷基自由基生成。随着干馏终温的升高,长链烷烃分解,支链烷烃侧链断裂,使轻质油脂肪烃碳链长度变短,重质油直链脂肪烃增多,页岩油发生更多的芳环缩合反应导致轻质油与重质油芳香环数量均增多,同时轻质油中芳环缩合程度加深。

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