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Correlating micro/meso pore evolution and chemical structure variation in a mild thermal treatment of a subbituminite
Xu, Shipei1,2; Han, Zhennan3; Wu, Rongcheng1; Cheng, Jiguang3; Xu, Guangwen1,3
2018
Source PublicationRSC ADVANCES
ISSN2046-2069
Volume8Issue:18Pages:9754-9761
AbstractThis work investigates the evolution of micro/meso pores during a mild thermal treatment of subbituminous coal based on the observation of coal structure changes with the gradual detachment of organic matter from the coal. Pores in coal can be described as super-micropores (d < 1 nm), micropores (1 nm < d < 2 nm) and mesopores (2 nm < d < 50 nm). The decomposition of the carboxyl group at 200 degrees C decreases the super-micropore volume. A mild and sustained reaction takes place at 300 degrees C to gradually change the aromaticity and CH2/CH3 ratio of the treated coal. The amount of micropore structure sharply decreases in the early stages of heating, while the amount of mesopore structure continuously decreases during the whole process. A dramatic reaction takes place at 400 degrees C to sharply change the aromaticity and CH2/CH3 ratio of the treated coal, while the detachment of volatile compounds from the coal matrix caused an evident variation in the mesopore structure of the coal. The aromaticity and CH2/CH3 ratio of coal organics are found to correlate with the volumes of super-micropores and mesopores, respectively. The super-micropores are identified as comprising the inter-layer distance between stacks of aromatic rings, and mesopores are the spaces between macromolecular aromatic rings which are inter-connected via aliphatic chains.
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1039/c7ra13215h
Indexed BySCI
Language英语
WOS KeywordGAS-ADSORPTION ; COMBUSTION REACTIVITY ; MERCURY INTRUSION ; ACTIVATED CARBONS ; GRAPHENE OXIDE ; CHAR STRUCTURE ; HEAT-TREATMENT ; BROWN-COAL ; RANK COALS ; PYROLYSIS
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
Funding OrganizationFund of State Key Laboratory of Multi-Phase Complex Systems(MPCS-2015-A-06) ; National High Technology Research and Development Program 863(2015AA050505-02) ; National Key Research and Development Program(2016YFB0600404-02)
WOS IDWOS:000430451800020
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/24179
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
3.Shenyang Univ Chem Technol, Inst Ind Chem & Energy Technol, Shenyang 110142, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Xu, Shipei,Han, Zhennan,Wu, Rongcheng,et al. Correlating micro/meso pore evolution and chemical structure variation in a mild thermal treatment of a subbituminite[J]. RSC ADVANCES,2018,8(18):9754-9761.
APA Xu, Shipei,Han, Zhennan,Wu, Rongcheng,Cheng, Jiguang,&Xu, Guangwen.(2018).Correlating micro/meso pore evolution and chemical structure variation in a mild thermal treatment of a subbituminite.RSC ADVANCES,8(18),9754-9761.
MLA Xu, Shipei,et al."Correlating micro/meso pore evolution and chemical structure variation in a mild thermal treatment of a subbituminite".RSC ADVANCES 8.18(2018):9754-9761.
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