Influence of retorting end temperature on chemical structure of oil-sand oil

doi:10.3969/j.issn.0438-1157.2013.11.045

Abstract

Abstract: Oil samples,obtained by retorting Indonesian oil sands at different end temperatures,were analyzed by ¹H nuclear magnetic resonance spectroscopy and elemental analyzer.Based on the assignments of hydrogen peaks,integrating each ¹H NMR peak can give hydrogen distribution in oil samples.The average structure parameters were calculated using modified Brown-Ladner method.The influence of retorting end temperature on chemical structure of the oil-sands oil could be revealed from an analysis for change tendency of structure parameters with retorting end temperature.The results showed that,with increasing end temperature,the chemical structure of oil-sands oil changed significantly,i.e.,the number of aliphatic carbons C_al,aromatic peripheral carbons C_p(us),aromatic carbons C_a(us),aromatic rings R_a(us),naphthenic rings R_n(us) and total rings R_t(us) all decreasing,mainly due to decomposition of alkanes,broken of alkyl side chains,condensation of aromatic and naphthenic rings and ring-opening.Owing to the different of oil constituents produced and that of influence degree of distillation-pyrolysis,average mass of unit structure and average relative molecular weight decrease first and then increase with rise of retorting end temperature.

Key words: oil sands, nuclear magnetic resonance, pyrolysis, chemical structure, alkane

关键词: 油砂, 核磁共振, 热解, 化学结构, 烷烃

CLC Number:

TK16

WANG Qing, GE Jianxin, JIA Chunxia, XU Xiaofei, LIU Hongpeng. Influence of retorting end temperature on chemical structure of oil-sand oil[J]. CIESC Journal, 2013, 64(11): 4216-4222.

王擎, 戈建新, 贾春霞, 许晓飞, 刘洪鹏. 干馏终温对油砂油化学结构的影响[J]. 化工学报, 2013, 64(11): 4216-4222.

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