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Study on the evolution characteristic of intermediate during the pyrolysis of oil shale
Li, Mengya1,2; Zhan, Jin-Hui1; Lai, Dengguo1,2; Tian, Yong1,2; Liu, Xiaoxing1; Xu, Guangwen1
2017-12-01
Source PublicationJOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
ISSN1388-6150
Volume130Issue:3Pages:2227-2238
Abstract

The pyrolysis of oil shale is a complex process including a myriad of chemical reactions. A widely approved understanding suggests a two-step decomposition process for oil shale pyrolysis, considering bitumen as the intermediate product. In this study, intermediates derived from various pyrolysis conditions are comprehensively studied by FTIR, GC, GC-MS and NMR methods to understand the pyrolysis mechanism of oil shale and composition feature of intermediate. The pyrolysis of oil shale is a dynamic process, and the results show that the intermediate is continuously generated before 400 A degrees C, accompanying with the formation of final products from both intermediate and kerogen. The maximum yield of intermediates is presented at the fastest oil-producing temperature range (375 A degrees C in this study). Carbon chains in intermediate become short with the increase in temperature. Most components in pyrolysis intermediate are long straight aliphatic chains; thus, intermediate is much heavier than shale oil. Further reactions make intermediate convert into shale oil product. Aliphatic hydrocarbons occupied the biggest proportion over 86% at 375 A degrees C, mainly in the form of straight-chain alkanes. A few parts of aromatic fragments with small ring numbers will also transfer into intermediate. The heteroatom-containing compounds are mainly alcohols, ketones, amides and halohydrocarbons. High aromaticity in shale oil at high temperatures can be attributed to the condensation reaction of abundant aliphatic hydrocarbons in intermediate. During the conversion process from intermediate to final products, the generating capacity of oil is evidently higher than that of gas.

KeywordOil Shale Intermediate Pyrolysis Structural Composition
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s10973-017-6610-z
Indexed BySCI
Language英语
WOS KeywordSTATE C-13 NMR ; RESIDUAL CARBON ; KEROGEN ; FTIR ; DECOMPOSITION ; SPECTROSCOPY ; CONVERSION ; KINETICS ; BITUMEN ; GC/MS
WOS Research AreaThermodynamics ; Chemistry
WOS SubjectThermodynamics ; Chemistry, Analytical ; Chemistry, Physical
Funding OrganizationNational Natural Science Foundation of China(21306210) ; National Basic Research Program of China(2014CB744302)
WOS IDWOS:000415619800097
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/23431
Collection多相复杂系统国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Li, Mengya,Zhan, Jin-Hui,Lai, Dengguo,et al. Study on the evolution characteristic of intermediate during the pyrolysis of oil shale[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,2017,130(3):2227-2238.
APA Li, Mengya,Zhan, Jin-Hui,Lai, Dengguo,Tian, Yong,Liu, Xiaoxing,&Xu, Guangwen.(2017).Study on the evolution characteristic of intermediate during the pyrolysis of oil shale.JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,130(3),2227-2238.
MLA Li, Mengya,et al."Study on the evolution characteristic of intermediate during the pyrolysis of oil shale".JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY 130.3(2017):2227-2238.
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