高温煤沥青中间相热转化行为

杨桃; 刘犇; 宋燕; 马兆昆; 宋怀河; 刘占军

高温煤沥青中间相热转化行为

杨桃^1,2,
刘犇¹,
宋燕^1,,
马兆昆³,
宋怀河³,
刘占军¹

1.
中国科学院山西煤炭化学研究所炭材料重点实验室, 山西太原 030001;
2.
中国科学院大学材料与光电研究中心, 北京 100049;
3.
北京化工大学化工资源有效利用国家重点实验室, 北京 100029

基金项目: NSFC-山西煤基低碳联合基金（U1610252）.

详细信息

作者简介:
杨桃,博士研究生.E-mail:taomung@126.com

通讯作者:
宋燕,研究员.E-mail:yansong1026@126.com

中图分类号: TQ127.1⁺1
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- 文章访问数: 487
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- 被引次数: 0
出版历程
- 收稿日期: 2019-09-20
- 录用日期: 2020-01-03
- 修回日期: 2019-11-30
- 刊出日期: 2019-12-28

Formation and transformation behavior of mesophase from three high softening-point pitches

1.
CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
2.
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;
3.
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China

Funds: National Natural Science Foundation of China (U1610252).

摘要

摘要: 沥青的组成结构直接决定其中间相形成和热转化行为。本文对3种高温煤沥青的组成和分子结构对中间相热转化的影响进行了研究。利用傅里叶红外光谱仪与X-射线衍射分析仪对煤沥青的分子结构进行分析，并采用带有热台的偏光显微镜原位观察煤沥青的中间相热转化行为。通过原位观察发现，不同高温煤沥青在相同条件下的中间相热转化行为并不完全相同，与其内部组成和结构相关。喹啉不溶物含量较高的煤沥青基炭微球成核速率显著高于生长速率，而芳香度较高的分子片层利于炭微球的生长与融并，从而形成体形中间相。
- 高温煤沥青 /
- 中间相 /
- 热转化 /
- 分子结构
Abstract: The transformation behavior of mesophase derived from three coal tar pitches with different softening-points was investigated. FTIR and XRD were used to analyze the compositions and molecular structures of pitches. The transformation behavior of the pitch to mesophase was observed in situ by a polarizing light microscope equipped with a heating stage. A correlation of the composition and molecular structure of the pitches to the development of the mesophase was obtained. Results indicate that the thermal conversion behavior of the three pitches to mesophase were different, and this was closely related to their aromaticity and quinolone insoluble fraction. The nucleation rate of mesocarbon microbeads was higher than the growth rate for the coal tar pitch with a high content of quinolone insolubles. A molecular lamellar structure with a high aromaticity benefitted the growth of microspheres and the formation of mesophase.
- High-softening point pitch /
- Mesophase /
- Thermal conversion /
- Molecular structure

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参考文献(10)

王成杨. 碳质中间相理论与应用[M]. 北京:科学出版社, 2015. (Wang C Y. Theory and Application of Carbon Mesophase[M]. Beijing:Science Press, 2015.)

杨辉,梁朋,宋怀河,等. 煤加氢液化残渣制备中间相沥青的研究[J]. 炭素技术, 2014, 33:26-30. (Yang H, Liang P, Song H H, et al. Preparation of mesophase pitch from coal hydroliquefaction residue[J]. Carbon Techniques, 2014, 33:26-30.)

钱树安,李春锋,周国英. 炭化原料的组成结构和中间相组织形态之间的关系[J]. 燃料化学学报, 1983, 4:348-358. (Qian S A, Li C F, Zhou G Y. The relationship between the composition and molecular structure of carbonizing feedstocks and mesophase textures formed in pyrolysis[J]. Journal of Fuel Chemistry and Technology, 1983, 4:348-358.)

Xu G Y, Yan Q, Yu H F, et al. Tracking and analyzing the structures and morphologies of mesocarbon microbeads (Mcmbs) in air oxidation process[J]. Polymer Bulletin, 2016, 73:3175-3182.

Zhu Y M, Zhao X F, Gao L J, et al. Properties and micro-morphology of primary quinoline insoluble and mesocarbon microbeads[J]. Journal of Materials Science, 2016, 51:8098-8107.

Parsa M R, Chaffee A L. The effect of densification with naoh on brown coal thermal oxidation behaviour and structure[J]. Fuel, 2018, 216:548-558.

Xie X, Zhao Y, Qiu P, et al. Investigation of the relationship between infrared structure and pyrolysis reactivity of coals with different ranks[J]. Fuel, 2018, 216:521-530.

Li K, Khanna R, Zhang J, et al. Comprehensive investigation of various structural features of bituminous coals using advanced analytical techniques[J]. Energy & Fuels, 2015, 29:7178-7189.

Dun W, Guijian L, Ruoyu S, et al. Investigation of structural characteristics of thermally metamorphosed coal by ftir spectroscopy and X-ray diffraction[J]. Energy & Fuels, 2013, 27:5823-5830.

李同起,王成扬. 碳质中间相形成机理研究[J]. 新型炭材料, 2005, 20:278-285. (Li T Q, Wang C Y. The formation mechanism of carbonaceous mesophase[J]. New Carbon Materials, 2005, 20:278-285.)

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