期刊
出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/15567036.2021.2024923
关键词
Ethylene residue pitch; thermal modification; microstructure; carbon microcrystalline; resistance
资金
- National Natural Science Foundation of China [U1361126]
- Excellent Talents Training Program of University of Science and Technology Liaoning [2018RC07]
- Liaoning Provincial Department of Education Project [2020LNQN03, LJKZ0309]
- Nature Science Foundation of Liaoning Province [2021-BS-245,2021-MS-306]
Ethylene residue pitch (ETP) is a by-product of crude oil pyrolysis. Thermal modification of ETP can enhance the quality of derived needle coke. Moderate thermal modification significantly improves the properties of the derived needle coke.
Ethylene residue pitch (ETP) is the by-product in the process of producing ethylene from the pyrolysis of crude oil. ETP is a kind of complex organic matrix with a lower aromaticity, a larger number of aliphatic chain hydrocarbons, and a higher content of carbon. To study the effects of thermal polycondensation on the quality of derived needle coke, 5 types of thermally modified ETPs have been used as the feedstock for needle coke production. Thermal modification is a favorable method to adjust the molecular structure parameters of ETP (especially on I-ar and CH3/CH2). I-ar is also a key parameter to determine the quality of ETP-based needle coke. Thermal modification treatment of ETP followed by liquid-phase carbonization is a feasible strategy to obtain high-quality ETP-based needle coke with the content of tended regular carbon microcrystals higher than 74%, the specific area (S-BET) lower than 6 m(2)center dot g(-1), the microstrength higher than 61%, and the resistance lower than 5.747 omega. Therefore, moderate thermal modification of ETP significantly enhances the properties of the derived needle coke.
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