Pyrolysis of petroleum asphaltenes from different geological origins and use of methylnaphthalenes and methylphenanthrenes as maturity indicators for asphaltenes

Bulletin of materials science

Aradhana Dutta¹  Manoj Kumar Sarmah³  Arun Borthakur² 

[1] Dibrugarh University, P.O. Dibrugarh 786 002, India$$Dibrugarh University, P.O. Dibrugarh 786 002, IndiaDibrugarh University, P.O. Dibrugarh 786 002, India$$;North East Institute of Science and Technology, P.O. Jorhat 786 001, India$$North East Institute of Science and Technology, P.O. Jorhat 786 001, IndiaNorth East Institute of Science and Technology, P.O. Jorhat 786 001, India$$;Oil India Limited, P.O. Duliajan, Dist. Dibrugarh 786 602, India$$Oil India Limited, P.O. Duliajan, Dist. Dibrugarh 786 602, IndiaOil India Limited, P.O. Duliajan, Dist. Dibrugarh 786 602, India$$

关键词: Maturity;    methylnaphthalenes;    methylphenanthrenes;    asphaltenes;    pyrolysate;    kerogen.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Asphaltenes separated from two different crude oils from upper Assam, India, having different geological origins, viz. DK (Eocene) and JN (Oligocene�?�Miocene) were pyrolysed at 600°C and the products were analysed by gas chromatography�?�mass spectrometry (GC/MS) especially for the generated alkylnaphthalenes and alkylphenanthrenes. Both the asphaltenes produced aliphatic as well as aromatic compound classes. Alkylnaphthalenes and alkylphenanthrenes were identified by using reference chromatograms and literature data and the distributions were used to assess thermal maturity of the asphaltenes. The ratios of �?-substituted to α-substituted isomers of both alkylnaphthalenes and alkylphenanthrenes revealed higher maturity of the JN asphaltenes than the DK asphaltenes. For both the asphaltenes the abundance of 1-methylphenanthrene dominated over that of 9-methylphenanthrene showing the terrestrial nature of the organic matter.

【 授权许可】

Unknown