Carbon Letters 2023 KCI Impact Factor : 1.35 KCI-WoS Impact Factor : 6.04
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pISSN : 1976-4251 / eISSN : 2233-4998
- https://journal.kci.go.kr/carbon
KJCKorea
Journal Central
Production of monodisperse spherical mesophase from coal tar pitch by solvent extraction
- Carbon Letters
- Abbr : Carbon Lett.
- 2023, 33(6), pp.1669-1677
- DOI : 10.1007/s42823-023-00481-8
- Publisher : Korean Carbon Society
- Research Area : Natural Science > Natural Science General > Other Natural Sciences General
- Received : November 15, 2022
- Accepted : February 8, 2023
- Published : October 1, 2023
Phiciato Phiciato 1, Thaha Yudi Nugraha 2, Darsono Nono 3, Huda Miftahul 1
1Research Center for Geological Resources, National Research and Innovation Agency (BRIN), Bandung, Indonesia
2Research Center for Metallurgy, National Research and Innovation Agency (BRIN), Tangerang Selatan, Indonesia
3Research Center for Advanced Materials, National Research and Innovation Agency (BRIN), Tangerang Selatan, Indonesia
Accredited
ABSTRACT
The spherical mesophases are the main precursors for the high tap density of carbonaceous anode batteries. However, it is challenging to control mesophase size without coalescence and no deformation since it quickly coalesces into a regular large sphere. Here, we propose a feasible extraction method to refine the spherical size of mesophase using benzene. Thermogravimetric and differential scanning calorimetry analysis of untreated pitch revealed that the maximum temperature for mesophase nucleation should not exceed 410 °C to provoke the nucleation of mesophase spheres while maintaining a high pyrolysis yield. The extraction results showed that the extraction weight tends to decrease with an increase in the solvent ratio. There is an exponential relationship between the influence of solvent ratio and the ability for extraction. The solubility of the spherical mesophase in benzene is size-dependent and can dissolve selectively spherical mesophases smaller than 5 µm. Consequently, a monodisperse spherical mesophase was obtained. The reason for forming uniform mesophase spheres can be explained by their thermodynamic state, as described by the “two-step” classical nucleation theory. Benzene effectively improves the size distribution of spherical mesophase by dissolving small sizes while retaining large ones.
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