Some biogenic-related compounds occluded inside asphaltene aggregates
Some biogenic-related compounds occluded inside asphaltene aggregates
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DOI：
10.1021/ef8007294
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发表时间：
2009-02
期刊：
影响因子：
5.3
通讯作者：
Chupeng Yang;Z. Liao;Lvhui Zhang;P. Creux
中科院分区：
文献类型：
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作者：
Chupeng Yang;Z. Liao;Lvhui Zhang;P. Creux
在H_2O_2/CH_3COOH体系中，16种沥青质通过温和的降解过程释放出沥青质聚集体中的封闭化合物。在氧化过程之前，所有n-C7沥青质(不溶于正庚烷的沥青质)都要用丙酮连续进行240h的索氏提取，以排除吸附/共沉淀化合物的干扰，这些化合物可能是在沥青质制备过程中引入的。在这些封闭化合物中，13个沥青质中检测到一系列偶数碳数的n-烷基-(1)烯，3个沥青质中同时检测到22，29，30-三去甲苯-17(21)-烯和17个α-HOP-20(21)-烯，另外3个沥青质中还检测到C23三环萜烯-12(13)-烯和C29 18-α-30-降碳-13(18)-烯共存。从16种沥青质中均检出一系列正构烷酸乙酯，其主要成分为碳数为偶数的正构烷酸乙酯。上述代表..。
The occluded compounds inside asphaltene aggregates were released from 16 asphaltenes through mild degradation processes oxidized by the H2O2/CH3COOH system. Prior to the oxidation procedure, all of the n-C7 asphaltenes (n-heptane-insoluble asphaltenes) were subjected to Soxhlet extraction by acetone continuously for 240 h to rule out interferences from the adsorbed/co-precipitated compounds, which were likely introduced during the asphaltene preparation processes. Among these occluded compounds, a series of even-carbon-numbered n-alk-(1)-enes were detected from 13 asphaltenes, 22,29,30-trisnorhop-17(21)-ene and 17α-hop-20(21)-ene were simultaneously detected from 3 asphaltenes, and C23 tricyclic terp-12(13)-ene and C29 18α-30-norneohop-13(18)-ene were found co-existent in another 3 asphaltenes. From all 16 asphaltenes, a series of n-alkanoic acid ethyl esters were detected from the occluded compounds, which were generally dominated by the even-carbon-numbered n-alkanoic acids in the esters. The above-rep...