煤沥青中甲苯可溶物的基础物性研究

doi:10.11896/cldb.201902031

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Abstract Three kinds of toluene soluble (named as TS_M, TS_OM and TS_TM) were obtained via the method of solvent extraction-hot filtering-distillation, and using toluene as solvent, medium pitch (MP), oxidation modified pitch (OMP) and thermal modified pitch (TMP) as raw materials. Elemental analyzer GPC gel permeation chromatography, ¹H-NMR, and FTIR spectroscopy combined with curve-fitting method were employed to study the basic properties of the resultant toluene solubles, such as aromatic index (Iar), branching index (CH₃/CH₂) and aromatic condensation (f_a). Moreover, TGA analyzer was used to reveal the thermostability of the toluene soluble, SEM and polarizing microscope (PM) was used to observe the micro-structure of the pyrolysis products. The experimental results indicated the satisfactory aromaticity of all the three kinds of to-luene solubles, as the aromatic indices (Iar) of TS_M, TS_OM, and TS_TM are 0.949,0.954 and 0.987, respectively. The aromatic condensations (f_a) are 0.967 2,0.968 7 and 0.978 5, respectively. The branching indices (CH₃/CH₂) of TS_M, TS_OM, and TS_TM are 0.200,0.297 and 0.503. It means that the number and the length of the branched chain in these three samples are in descending order. The pyrolysis characteristic temperature of TS_M, TS_OM, and TS_TM were increased successively, which is correlated well with the indicators of Iar, CH₃/CH₂ and f_a.

Key words： coal tar pitch toluene soluble pyrolysis characteristic

Published: 31 January 2019

CLC number:

TQ522.65

Fund:This work was financially supported by the National Natural Science Foundation of China (U1361126), the Specialized Research Fund for the Doctoral Program of Higher Education (20132120110001), the Natural Science Foundation of Liaoning Province (20180551218), the Youth Fund of the Education Department of Liaoning Province (2017LNQN04), and the Youth Fund of University of Science and Technology Liaoning (2017QN06, 2016QN25).

About author:: Yaming Zhu received his Ph. D. degrees in Chemical Engineering and Technology from University of Science and Technology Liaoning (USTL) in 2017. He is currently an lecturer in University of Science and Technology Liaoning (USTL). His research interests are preparation and application of pitch-based carbon materials.Xuefei Zhao received his Ph. D. degree in chemical technology from Dalian University of Technology (DUT) in 2011. He is currently an professor in University of Science and Technology Liaoning (USTL). His research interests are deep processing of coal tar and coal-based carbon materials.

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	ZHU Yaming
	ZHAO Chunlei
	LIU Xian
	ZHAO Xuefei
	GAO Lijuan
	CHENG Junxia

Cite this article:

ZHU Yaming,ZHAO Chunlei,LIU Xian, et al. Study on the Basic Physical Properties of Toluene Soluble Extracted from Coal Tar Pitch[J]. Materials Reports, 2019, 33(2): 368-372.

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http://www.mater-rep.com/EN/10.11896/cldb.201902031 OR http://www.mater-rep.com/EN/Y2019/V33/I2/368

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