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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
发表期刊RSC ADVANCES
ISSN2046-2069
卷号8期号:18页码:9754-9761
摘要This 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.
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
DOI10.1039/c7ra13215h
收录类别SCI
语种英语
关键词[WOS]GAS-ADSORPTION ; COMBUSTION REACTIVITY ; MERCURY INTRUSION ; ACTIVATED CARBONS ; GRAPHENE OXIDE ; CHAR STRUCTURE ; HEAT-TREATMENT ; BROWN-COAL ; RANK COALS ; PYROLYSIS
WOS研究方向Chemistry
WOS类目Chemistry, Multidisciplinary
项目资助者Fund 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记录号WOS:000430451800020
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/24179
专题多相复杂系统国家重点实验室
作者单位1.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
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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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