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Method for Analyzing the Molecular and Carbon Isotope Composition of Volatile Hydrocarbons (C-1-C-9) in Natural Gas
Cao, Chunhui; Li, Zhongping; Li, Liwu; Du, Li
2018
Source PublicationJOURNAL OF ANALYTICAL METHODS IN CHEMISTRY
ISSN2090-8865
Pages9
AbstractSolid-phase microextraction (SPME) coupled with gas chromatography-isotope ratio mass spectrometry (GC-IRMS) has already been applied to collect and identify volatile light hydrocarbons in oil and source rocks. However, this technology has not yet been used to analyze volatile light hydrocarbons in dry gas (natural gas with C-1/C2+ > 95%). In this study, we developed a method to measure the molecular and carbon isotope composition of natural gas using divinylbenzene/carboxen/polydimethylsiloxane (DVB/CAR/PDMS) fiber. This fiber proved to be suitable for extracting C-1-C-9 hydrocarbons from natural gas without inducing carbon isotopic fractionation. Notably, the extraction coefficients of the analytes were not the same but rather increased with the increasing carbon number of the hydrocarbons. Nevertheless, we successfully identified 24 hydrocarbons from the in-lab standard natural gas, while also obtaining the carbon isotope composition of C-1 to C-9 hydrocarbons with satisfying repeatability. The relative standard deviation (RSD) of the molecular composition data was in the range of 0.06-0.74%, with the RSDs of the carbon isotope composition data not exceeding 1 parts per thousand. Finally, seven natural gas samples, collected from different sedimentary basins, were successfully analyzed and the stable carbon isotope compositions of C-1-C-9 hydrocarbons present in these were determined through this method. Overall, the new approach provides a simple but useful technique to obtain more geochemical information about the source and evolution of natural gas.
DOI10.1155/2018/4512081
Funding OrganizationNational Science Foundation of China ; National Science Foundation of China ; Project of Gansu Key Lab ; Project of Gansu Key Lab ; National Science Foundation of China ; National Science Foundation of China ; Project of Gansu Key Lab ; Project of Gansu Key Lab ; National Science Foundation of China ; National Science Foundation of China ; Project of Gansu Key Lab ; Project of Gansu Key Lab ; National Science Foundation of China ; National Science Foundation of China ; Project of Gansu Key Lab ; Project of Gansu Key Lab
WOS KeywordLIGHT-HYDROCARBONS ; CRUDE OILS ; GEOCHEMICAL CHARACTERISTICS ; ORIGIN ; PETROLEUM ; BASIN ; BIODEGRADATION
Language英语
Funding ProjectNational Science Foundation of China[41502143] ; Project of Gansu Key Lab[1309RTSA041]
Funding OrganizationNational Science Foundation of China ; National Science Foundation of China ; Project of Gansu Key Lab ; Project of Gansu Key Lab ; National Science Foundation of China ; National Science Foundation of China ; Project of Gansu Key Lab ; Project of Gansu Key Lab ; National Science Foundation of China ; National Science Foundation of China ; Project of Gansu Key Lab ; Project of Gansu Key Lab ; National Science Foundation of China ; National Science Foundation of China ; Project of Gansu Key Lab ; Project of Gansu Key Lab
WOS Research AreaChemistry ; Engineering
WOS SubjectChemistry, Analytical ; Engineering, Civil
WOS IDWOS:000454803600001
PublisherHINDAWI LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90230
Collection兰州油气中心
Corresponding AuthorCao, Chunhui
AffiliationChinese Acad Sci, Inst Geol & Geophys, Gansu Prov Key Lab Petr Resources Res, Key Lab Petr Resources, Lanzhou 730000, Gansu, Peoples R China
Recommended Citation
GB/T 7714
Cao, Chunhui,Li, Zhongping,Li, Liwu,et al. Method for Analyzing the Molecular and Carbon Isotope Composition of Volatile Hydrocarbons (C-1-C-9) in Natural Gas[J]. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY,2018:9.
APA Cao, Chunhui,Li, Zhongping,Li, Liwu,&Du, Li.(2018).Method for Analyzing the Molecular and Carbon Isotope Composition of Volatile Hydrocarbons (C-1-C-9) in Natural Gas.JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY,9.
MLA Cao, Chunhui,et al."Method for Analyzing the Molecular and Carbon Isotope Composition of Volatile Hydrocarbons (C-1-C-9) in Natural Gas".JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY (2018):9.
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