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The methylation of aromatic nuclei - I: Implications for the geochemical evolution of gas
Liu, Yanhong1,2,3; Wu, Yingqin1,2; Xia, Yanqing1,2; Xing, Lantian1,2; Tian, Chuntao1,2; Lei, Tianzhu1,2
2019-11-01
Source PublicationINTERNATIONAL JOURNAL OF COAL GEOLOGY
ISSN0166-5162
Volume215Pages:11
AbstractAromatic hydrocarbons are an important component in crude oil and sediments. Furthermore, the structure of macromolecular organic matter (such as kerogen) is also based on aromatic nuclei. The earlier methylation and later demethylation of various aromatic nuclei would affect the chemical components and carbon isotopes of aromatics as well as saturated hydrocarbons and gaseous hydrocarbons. The scope of the present study was to investigate the role of aromatic nuclei in the formation and geochemical evolution of natural gas in complex geological systems. The use of model compounds could simplify the complex system, and n-tricosane (n-C-23), n-tetracosane (n-C-24), and naphthalene (N) were selected as model compounds for paraffins and aromatic hydrocarbons and subjected to pyrolysis experiments. The results showed that aromatic nuclei had a slight influence on the gas generation without using a catalyst. However, the gaseous components were substantially affected by aromatic nuclei under the catalysis of clay, when the temperature was lower than 400 degrees C. The ratios of isoparaffin to n-alkane of gaseous hydrocarbons were reduced by the aromatic nuclei. As carbon isotopically lighter methyls preferred to combine with the aromatic nuclei, the gas productions were reduced, and there was a C-13 depletion of methane with increasing temperature, which is contrary to the case of paraffin cracking alone. This trend can also be observed in the pyrolysis gases formed from the type II and III kerogens. The macromolecular aromatic nuclei played a similar role with the small aromatic hydrocarbons. These effects would mainly occur in the mature to highly mature stage of the organic matter (the paleo-geothermal temperature is <= 150 degrees C). The above explorative experiments suggested that a large number of aromatic nuclei and their methylation reactions could exert a significant influence on the distributions and the carbon isotopic compositions of gaseous hydrocarbons in the evolution of sedimentary organic matter. This research also provided a new explanation for the carbon isotopic abnormality (the C-13-depleted methane and the increasing delta C-13(2)-delta C-13(1) values) of deep natural gas of the Tarim Basin, in northwest China.
KeywordAromatic nuclei Methylation process Natural gas Ratio of isoparaffin to n-alkane delta C-13(methane)
DOI10.1016/j.coal.2019.103302
Funding OrganizationNational Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Foundation for Excellent Youth Scholars of NIEER, CAS ; Foundation for Excellent Youth Scholars of NIEER, CAS ; Foundation for Excellent Youth Scholars of NIEER, CAS ; Foundation for Excellent Youth Scholars of NIEER, CAS ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Foundation for Excellent Youth Scholars of NIEER, CAS ; Foundation for Excellent Youth Scholars of NIEER, CAS ; Foundation for Excellent Youth Scholars of NIEER, CAS ; Foundation for Excellent Youth Scholars of NIEER, CAS ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Foundation for Excellent Youth Scholars of NIEER, CAS ; Foundation for Excellent Youth Scholars of NIEER, CAS ; Foundation for Excellent Youth Scholars of NIEER, CAS ; Foundation for Excellent Youth Scholars of NIEER, CAS ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Foundation for Excellent Youth Scholars of NIEER, CAS ; Foundation for Excellent Youth Scholars of NIEER, CAS ; Foundation for Excellent Youth Scholars of NIEER, CAS ; Foundation for Excellent Youth Scholars of NIEER, CAS
WOS KeywordTHERMAL-CRACKING ; ORGANIC-MATTER ; METHANE GENERATION ; NATURAL-GAS ; TARIM BASIN ; OIL ; PYROLYSIS ; MINERALS ; INSIGHTS ; SYSTEM
Language英语
Funding ProjectNational Science and Technology Major Project of China[2016ZX05007001-004] ; National Natural Science Foundation of China[41272147] ; National Natural Science Foundation of China[41772147] ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Foundation for Excellent Youth Scholars of NIEER, CAS
Funding OrganizationNational Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Foundation for Excellent Youth Scholars of NIEER, CAS ; Foundation for Excellent Youth Scholars of NIEER, CAS ; Foundation for Excellent Youth Scholars of NIEER, CAS ; Foundation for Excellent Youth Scholars of NIEER, CAS ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Foundation for Excellent Youth Scholars of NIEER, CAS ; Foundation for Excellent Youth Scholars of NIEER, CAS ; Foundation for Excellent Youth Scholars of NIEER, CAS ; Foundation for Excellent Youth Scholars of NIEER, CAS ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Foundation for Excellent Youth Scholars of NIEER, CAS ; Foundation for Excellent Youth Scholars of NIEER, CAS ; Foundation for Excellent Youth Scholars of NIEER, CAS ; Foundation for Excellent Youth Scholars of NIEER, CAS ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Science and Technology Major Project of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Opening Fund of the Key Laboratory for Salt Lake Geology and Environment, Qinghai Institute of Salt Lakes ; Foundation for Excellent Youth Scholars of NIEER, CAS ; Foundation for Excellent Youth Scholars of NIEER, CAS ; Foundation for Excellent Youth Scholars of NIEER, CAS ; Foundation for Excellent Youth Scholars of NIEER, CAS
WOS Research AreaEnergy & Fuels ; Geology
WOS SubjectEnergy & Fuels ; Geosciences, Multidisciplinary
WOS IDWOS:000497256800002
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95818
Collection兰州油气中心
Corresponding AuthorXia, Yanqing
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Gansu Prov Key Lab Petr Resources, Lanzhou 730000, Gansu, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Lanzhou 730000, Gansu, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author AffilicationInstitute of Geology and Geophysics, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Geology and Geophysics, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Liu, Yanhong,Wu, Yingqin,Xia, Yanqing,et al. The methylation of aromatic nuclei - I: Implications for the geochemical evolution of gas[J]. INTERNATIONAL JOURNAL OF COAL GEOLOGY,2019,215:11.
APA Liu, Yanhong,Wu, Yingqin,Xia, Yanqing,Xing, Lantian,Tian, Chuntao,&Lei, Tianzhu.(2019).The methylation of aromatic nuclei - I: Implications for the geochemical evolution of gas.INTERNATIONAL JOURNAL OF COAL GEOLOGY,215,11.
MLA Liu, Yanhong,et al."The methylation of aromatic nuclei - I: Implications for the geochemical evolution of gas".INTERNATIONAL JOURNAL OF COAL GEOLOGY 215(2019):11.
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