@article{ART003208663},
author={Ting He and Siying Xin and Louwei Cui and Sijie Wang and Shiquan He and Xian Xu and Tao Liu and Yonghong Zhu and Jiaojiao Liu and Dong Li},
title={Effect of changes in the structure and composition of medium–low-temperature coal tar pitch on the quality of needle coke},
journal={Carbon Letters},
issn={1976-4251},
year={2025},
volume={35},
number={2},
pages={575-591},
doi={10.1007/s42823-024-00795-1}
TY - JOUR
AU - Ting He
AU - Siying Xin
AU - Louwei Cui
AU - Sijie Wang
AU - Shiquan He
AU - Xian Xu
AU - Tao Liu
AU - Yonghong Zhu
AU - Jiaojiao Liu
AU - Dong Li
TI - Effect of changes in the structure and composition of medium–low-temperature coal tar pitch on the quality of needle coke
JO - Carbon Letters
PY - 2025
VL - 35
IS - 2
PB - Korean Carbon Society
SP - 575
EP - 591
SN - 1976-4251
AB - The structure and composition of coal tar pitch are critical in the production of superior needle coke. We used high-temperature refined coal tar pitch (HRCTP) to modify medium–low-temperature refined coal tar pitch (MLRCTP) for needle coke preparation. Various characterization techniques were applied to evaluate the effects of the HRCTP addition on the MLRCTP's structure and composition, and to investigate the microstructural and crystallographic differences in needle coke from different feedstocks. We identified the optimal HRCTP addition level and assessed how carbonization reaction conditions influenced needle coke quality. The findings indicated that HRCTP addition increased the aromatic hydrocarbons content while reducing the heterocyclic compounds and excess alkanes, leading to enhanced structure and composition, which supported the structured development of carbon-based structures during the thermal polycondensation process. Notably, higher HRCTP amounts did not equate to better outcomes. With a 25% HRCTP additive level, the needle coke’s microstructure showed a highly ordered fibrous texture with optimal orientation, the greatest degree of graphitization, and a mature graphite crystal content of 24.84%. Further optimization of the carbonization process demonstrated that very high temperatures might cause the formation of numerous mosaic structures due to disordered radical cross-linking. Properly reducing pressure at high temperatures could promote adequate directional airflow and apply shear force during orderly stacking of the mesophase, thus enhancing the carbon lamellae’s streamline and orientation. Following the carbonization process optimization, the mature graphite crystal content in the needle coke increased from 24.84% to 39.87%.
KW - Needle coke;Carbonization process;Modification;Medium–low-temperature coal tar pitch;Hightemperature coal tar pitch;Microstructure
DO - 10.1007/s42823-024-00795-1
ER -
Ting He, Siying Xin, Louwei Cui, Sijie Wang, Shiquan He, Xian Xu, Tao Liu, Yonghong Zhu, Jiaojiao Liu and Dong Li. (2025). Effect of changes in the structure and composition of medium–low-temperature coal tar pitch on the quality of needle coke. Carbon Letters, 35(2), 575-591.
Ting He, Siying Xin, Louwei Cui, Sijie Wang, Shiquan He, Xian Xu, Tao Liu, Yonghong Zhu, Jiaojiao Liu and Dong Li. 2025, "Effect of changes in the structure and composition of medium–low-temperature coal tar pitch on the quality of needle coke", Carbon Letters, vol.35, no.2 pp.575-591. Available from: doi:10.1007/s42823-024-00795-1
Ting He, Siying Xin, Louwei Cui, Sijie Wang, Shiquan He, Xian Xu, Tao Liu, Yonghong Zhu, Jiaojiao Liu, Dong Li "Effect of changes in the structure and composition of medium–low-temperature coal tar pitch on the quality of needle coke" Carbon Letters 35.2 pp.575-591 (2025) : 575.
Ting He, Siying Xin, Louwei Cui, Sijie Wang, Shiquan He, Xian Xu, Tao Liu, Yonghong Zhu, Jiaojiao Liu, Dong Li. Effect of changes in the structure and composition of medium–low-temperature coal tar pitch on the quality of needle coke. 2025; 35(2), 575-591. Available from: doi:10.1007/s42823-024-00795-1
Ting He, Siying Xin, Louwei Cui, Sijie Wang, Shiquan He, Xian Xu, Tao Liu, Yonghong Zhu, Jiaojiao Liu and Dong Li. "Effect of changes in the structure and composition of medium–low-temperature coal tar pitch on the quality of needle coke" Carbon Letters 35, no.2 (2025) : 575-591.doi: 10.1007/s42823-024-00795-1
Ting He; Siying Xin; Louwei Cui; Sijie Wang; Shiquan He; Xian Xu; Tao Liu; Yonghong Zhu; Jiaojiao Liu; Dong Li. Effect of changes in the structure and composition of medium–low-temperature coal tar pitch on the quality of needle coke. Carbon Letters, 35(2), 575-591. doi: 10.1007/s42823-024-00795-1
Ting He; Siying Xin; Louwei Cui; Sijie Wang; Shiquan He; Xian Xu; Tao Liu; Yonghong Zhu; Jiaojiao Liu; Dong Li. Effect of changes in the structure and composition of medium–low-temperature coal tar pitch on the quality of needle coke. Carbon Letters. 2025; 35(2) 575-591. doi: 10.1007/s42823-024-00795-1
Ting He, Siying Xin, Louwei Cui, Sijie Wang, Shiquan He, Xian Xu, Tao Liu, Yonghong Zhu, Jiaojiao Liu, Dong Li. Effect of changes in the structure and composition of medium–low-temperature coal tar pitch on the quality of needle coke. 2025; 35(2), 575-591. Available from: doi:10.1007/s42823-024-00795-1
Ting He, Siying Xin, Louwei Cui, Sijie Wang, Shiquan He, Xian Xu, Tao Liu, Yonghong Zhu, Jiaojiao Liu and Dong Li. "Effect of changes in the structure and composition of medium–low-temperature coal tar pitch on the quality of needle coke" Carbon Letters 35, no.2 (2025) : 575-591.doi: 10.1007/s42823-024-00795-1
