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Abstract <p>Precarbonization is a crucial step in the graphitization of petroleum coke to produce anode materials, and its caking property adversely affects the stable operation of this process. Using caking petroleum coke as the raw materials, the caking properties were determined with characterization parameters and a pre-oxidation method was proposed to destroy the caking tendency during precarbonization in this study. The caking characteristics of different types of petroleum coke were analyzed, and the effects of pre-oxidation temperature, time, and petroleum coke type on caking destruction were investigated. The experimental results showed that: (1) The caking characteristics varied significantly among different petroleum coke; the caking index correlated with the volatile content but was unrelated to sulfur content. (2) The caking tendency of petroleum coke decreased with increasing pre-oxidation temperature and extended reaction time. (3) The same pre-oxidation conditions yielded different caking destruction effects on different petroleum coke. Fujian low-sulfur petroleum coke (FJ) achieved complete caking destruction (caking index decreased from 72.02 to 0%) after reacting in air at 250°C for 10 min. (4) The pre-oxidation process had no impact on the subsequent graphitization process of petroleum coke, making it a practical and promising method for destroying the caking tendency of petroleum coke.</p>

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Caking Destruction of Petroleum Coke via Low-Temperature Pre-Oxidation

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • Zhi-gang Zhao,
  • Jun-jie Ni,
  • Wei Chen,
  • Yu-li Duan,
  • Kai-wen Guo,
  • Shuang Wu,
  • Xiang-chun Liu,
  • Ping Cui

摘要

Abstract

Precarbonization is a crucial step in the graphitization of petroleum coke to produce anode materials, and its caking property adversely affects the stable operation of this process. Using caking petroleum coke as the raw materials, the caking properties were determined with characterization parameters and a pre-oxidation method was proposed to destroy the caking tendency during precarbonization in this study. The caking characteristics of different types of petroleum coke were analyzed, and the effects of pre-oxidation temperature, time, and petroleum coke type on caking destruction were investigated. The experimental results showed that: (1) The caking characteristics varied significantly among different petroleum coke; the caking index correlated with the volatile content but was unrelated to sulfur content. (2) The caking tendency of petroleum coke decreased with increasing pre-oxidation temperature and extended reaction time. (3) The same pre-oxidation conditions yielded different caking destruction effects on different petroleum coke. Fujian low-sulfur petroleum coke (FJ) achieved complete caking destruction (caking index decreased from 72.02 to 0%) after reacting in air at 250°C for 10 min. (4) The pre-oxidation process had no impact on the subsequent graphitization process of petroleum coke, making it a practical and promising method for destroying the caking tendency of petroleum coke.