Preparation of mesophase pitch from refined coal tar pitch using naphthalene-based mesophase pitch as nucleating agent

[Display omitted] •In this paper, the mesophase pitch with wide-area streamlined texture were obtained.•The additive can significantly promote the formation of mesophase spheres.•The additive can shorten the time required for the formation of mesophase pitch. By adding naphthalene-based mesophase pi...

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Bibliographic Details
Published in:Fuel (Guildford) 2019-05, Vol.243, p.390-397
Main Authors: Zhang, Xingwei, Meng, Yuchen, Fan, Baolin, Ma, Zhaokun, Song, Huaihe
Format: Article
Language:English
Subjects:
Aromaticity
Carbonization
Co-carbonization
Coal tar
Coking
Condensates
Fourier transforms
Infrared analysis
Infrared spectroscopy
Mesophase
Mesophase pitch
Naphthalene
Nucleating agent
Pitch (material)
Pyrolysis
Pyrolysis products
Raman spectroscopy
Refined coal tar pitch
Spectroscopy
Spectrum analysis
Tar
Thermogravimetric analysis
X-ray diffraction
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Summary:[Display omitted] •In this paper, the mesophase pitch with wide-area streamlined texture were obtained.•The additive can significantly promote the formation of mesophase spheres.•The additive can shorten the time required for the formation of mesophase pitch. By adding naphthalene-based mesophase pitch (NBMP) into refined coal tar pitch (RCTP), pyrolysis products were obtained by dry-blending and co-carbonization method. The properties of pyrolysis products were characterized by polarizing microscope, thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT-IR), X-ray diffractometer (XRD) and Raman spectroscopy. The result shows the NBMP can obviously change the mesophase development of RCTP because it can promote the formation of mesophase spheres during the pyrolysis process. The carbon yield and aromaticity of pyrolysis products were increased with the increase of NBMP content. The anisotropic texture was wide-area structure when the NBMP content was 5 wt%. However, when the content of the additive is increased to 10 wt%, pyrolysis products will appear coking. The main role of this additive is to accelerate the reaction rate as the “nucleating agent” of the thermal condensation reaction.
ISSN:0016-2361
1873-7153
DOI:10.1016/j.fuel.2019.01.114