| RESEARCH PAPER |
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| Pyrolysis Characteristics and Properties of Thermal Conversion Products on Toluene Soluble Component from Medium Pitch |
| ZHU Yaming1, ZHAO Xuefei1, CHENG Junxia1, LIU Wei1, LU Jun1,2, WANG Ying3
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1 Engineering Research Center of Advanced Coal Coking and Efficient Use of Coal Resources, University of Science and Technology Liaoning, Anshan 114051;
2 College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006;
3 Anshan Xingde Material Technology Co. Ltd, Anshan 114048 |
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Abstract Elemental composition, pyrolysis characteristics and microcrystalline structure of thermal conversion products on toluene soluble component from medium pitch were studied by elemental analysis, TG/DTG, polarizing microscope, X-ray diffraction, Raman spectrum and curve-fitting methods. The Flynn-Wall-Ozawa method and Kissinger-Akahira-Sunose method were used to calculate the pyrolysis activation energy of toluene soluble component. The Satava-Sastak method was used to investigate the pyrolysis kinetic parameters of toluene soluble component from medium pitch. Briefly, the activation energy (E) and pre-exponential factor (A) were E=88.48 kJ/mol and lgA=10.22, the reaction series was 2, and the pyrolysis mechanism model of toluene soluble is random nucleation and subsequent growth. What’s more, the optical microstructure of calcined thermal conversion product shows that the distribution of optical microstructure contents were mosaic structure (23.74%), crude fiber structure (14.80%), fine fiber structure (17.88%), and large structure (30.45%), respectively. Combined with XRD analysis and curve-fitting method, it was revealed that the content of ordered carbon crystallite (Ig) in the product was 41.86%. Raman spectrum and curve-fitted method proves that the content of ideal graphite carbon crystallite was 11.59%, the content of detect carbon crystallite was 79.31%, and the ratio of amorphous carbon was 9.10%. The thermal conversion product has a good graphitization ability.
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Published: 08 May 2018
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2017, Vol. 31 
