SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2024, Vol. 67 ›› Issue (3): 135-147.DOI: 10.1016/j.cjche.2023.11.017

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Particle agglomeration and inhibition method in the fluidized pyrolysis reaction of waste resin

Congjing Ren1,2, Peng Zhang1,2, Qi Song2, Zhengliang Huang2, Yao Yang2, Yongrong Yang2   

  1. 1 Ningbo Innovation Center, Zhejiang University, Ningbo 315100, China;
    2 College of Chemical and Biological Engineering, Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, Zhejiang University, Hangzhou 310027, China
  • 收稿日期:2023-04-28 修回日期:2023-11-28 出版日期:2024-03-28 发布日期:2024-06-01
  • 通讯作者: Peng Zhang,E-mail address:zhangp94@zju.edu.cn.
  • 基金资助:
    The authors acknowledge the support and encouragement of the Joint Funds of the National Natural Science Foundation of China (No. U21B2095), and the Major Research Project of National Natural Science Foundation of China (No. 91834303).

Particle agglomeration and inhibition method in the fluidized pyrolysis reaction of waste resin

Congjing Ren1,2, Peng Zhang1,2, Qi Song2, Zhengliang Huang2, Yao Yang2, Yongrong Yang2   

  1. 1 Ningbo Innovation Center, Zhejiang University, Ningbo 315100, China;
    2 College of Chemical and Biological Engineering, Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, Zhejiang University, Hangzhou 310027, China
  • Received:2023-04-28 Revised:2023-11-28 Online:2024-03-28 Published:2024-06-01
  • Contact: Peng Zhang,E-mail address:zhangp94@zju.edu.cn.
  • Supported by:
    The authors acknowledge the support and encouragement of the Joint Funds of the National Natural Science Foundation of China (No. U21B2095), and the Major Research Project of National Natural Science Foundation of China (No. 91834303).

摘要: This work investigated the pyrolysis reaction of waste resin in a fluidized bed reactor. It was found that the pyrolysis-generated ash would adhere to the surface of ceramic particles, causing particle agglomeration and defluidization. Adding kaolin could effectively inhibit the particle agglomeration during the fluidized pyrolysis reaction through physical isolation and chemical reaction. On the one hand, kaolin could form a coating layer on the surface of ceramic particles to prevent the adhesion of organic ash generated by the pyrolysis of resin. On the other hand, when a sufficient amount of kaolin (≥0.2% (mass)) was added, the activated kaolin could fully contact with the Na+ ions generated by the pyrolysis of resin and react to form a high-melting aluminosilicate mineral (nepheline), which could reduce the formation of low-melting-point sodium sulfate and thereby avoid the agglomeration of ceramic particles.

关键词: Pyrolysis reaction of waste resin, Fluidization, Particle agglomeration, Kaolin

Abstract: This work investigated the pyrolysis reaction of waste resin in a fluidized bed reactor. It was found that the pyrolysis-generated ash would adhere to the surface of ceramic particles, causing particle agglomeration and defluidization. Adding kaolin could effectively inhibit the particle agglomeration during the fluidized pyrolysis reaction through physical isolation and chemical reaction. On the one hand, kaolin could form a coating layer on the surface of ceramic particles to prevent the adhesion of organic ash generated by the pyrolysis of resin. On the other hand, when a sufficient amount of kaolin (≥0.2% (mass)) was added, the activated kaolin could fully contact with the Na+ ions generated by the pyrolysis of resin and react to form a high-melting aluminosilicate mineral (nepheline), which could reduce the formation of low-melting-point sodium sulfate and thereby avoid the agglomeration of ceramic particles.

Key words: Pyrolysis reaction of waste resin, Fluidization, Particle agglomeration, Kaolin