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Peer-reviewedCC BY-NC-ND 4.0ACS Omega

Enhancing the Valorization of Heavy Coal Tar through SBS Modification: Pyrolysis Kinetics and Thermal Conversion Behavior

  • Wang Guohua1,2
  • Huang Zhengze1,2
  • Xu Zhen1,2
  • Pei Yanchun1,2
  • Jiang Zhufeng1,2
  • Li Jiayin1,2
  • Jia Yang1,2
  • Hao Shu1,2
  1. 1Changji University , , , ,
  2. 2Changji Univeristy , , ,
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Abstract

Heavy coal tar (HCT), a byproduct of coal pyrolysis, presents challenges in resource utilization due to its complex composition but also provides opportunities for value-added conversion. This study explored the modification of HCT using different SBS copolymers as screening candidates, followed by detailed investigation of a representative SBS-modified system. The structural evolution associated with SBS incorporation was characterized using Fourier-transform infrared spectroscopy (FTIR), ultimate analysis, gel permeation chromatography (GPC), and nuclear magnetic resonance (13C NMR). Kinetic analysis and thermodynamic simulation during heat treatment were performed to evaluate the reaction behavior of SBS-modified HCT. The results showed that (1) SBS incorporation did not significantly alter hydroxyl or aliphatic structures in HCT. (2) The normalized elemental composition of MHCT-YH802–4% was represented as C7H8.50N0.04O0.41, and a representative statistical composition of C8.78H10.65N0.05O0.51 was estimated using the GPC-derived Mn. (3) Among the evaluated kinetic models, the three-dimensional diffusion function showed a relatively better fit under the investigated heating conditions and was therefore selected as an empirical mathematical descriptor of the overall thermal conversion behavior. These results underscore the potential of polymer-modified HCT in providing a basis for precursor structure control and thermal behavior analysis.

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Cite

BibTeXRIS
BibTeX
@article{guohua2026enhancing,
  title = {{Enhancing the Valorization of Heavy Coal Tar through SBS Modification: Pyrolysis Kinetics and Thermal Conversion Behavior}},
  author = {Wang Guohua and Huang Zhengze and Xu Zhen and Pei Yanchun and Jiang Zhufeng and Li Jiayin and Jia Yang and Hao Shu},
  journal = {ACS Omega},
  year = {2026},
  month = oct,
  doi = {10.1021/acsomega.6c04605},
  url = {https://pubs.acs.org/acsodf/article/11/42/64654/5452257/Enhancing-the-Valorization-of-Heavy-Coal-Tar},
  note = {CC BY-NC-ND 4.0},
}
RIS
TY  - JOUR
TI  - Enhancing the Valorization of Heavy Coal Tar through SBS Modification: Pyrolysis Kinetics and Thermal Conversion Behavior
AU  - Wang Guohua
AU  - Huang Zhengze
AU  - Xu Zhen
AU  - Pei Yanchun
AU  - Jiang Zhufeng
AU  - Li Jiayin
AU  - Jia Yang
AU  - Hao Shu
PY  - 2026
DA  - 2026/10/15
JO  - ACS Omega
DO  - 10.1021/acsomega.6c04605
UR  - https://pubs.acs.org/acsodf/article/11/42/64654/5452257/Enhancing-the-Valorization-of-Heavy-Coal-Tar
AB  - Heavy coal tar (HCT), a byproduct of coal pyrolysis, presents challenges in resource utilization due to its complex composition but also provides opportunities for value-added conversion. This study explored the modification of HCT using different SBS copolymers as screening candidates, followed by detailed investigation of a representative SBS-modified system. The structural evolution associated with SBS incorporation was characterized using Fourier-transform infrared spectroscopy (FTIR), ultimate analysis, gel permeation chromatography (GPC), and nuclear magnetic resonance (13C NMR). Kinetic analysis and thermodynamic simulation during heat treatment were performed to evaluate the reaction behavior of SBS-modified HCT. The results showed that (1) SBS incorporation did not significantly alter hydroxyl or aliphatic structures in HCT. (2) The normalized elemental composition of MHCT-YH802–4% was represented as C7H8.50N0.04O0.41, and a representative statistical composition of C8.78H10.65N0.05O0.51 was estimated using the GPC-derived Mn. (3) Among the evaluated kinetic models, the three-dimensional diffusion function showed a relatively better fit under the investigated heating conditions and was therefore selected as an empirical mathematical descriptor of the overall thermal conversion behavior. These results underscore the potential of polymer-modified HCT in providing a basis for precursor structure control and thermal behavior analysis.
SN  - 2470-1343
ER  -