Journal of South China University of Technology (Natural Science Edition) ›› 2006, Vol. 34 ›› Issue (3): 20-22,33.

• Chemistry,Chemical & Energy Engineering • Previous Articles     Next Articles

Pyrolysis Kinetics of Waste Print Circuit Board in Vacuum Condition

Gan Ge  Chen L ie-qiang  Cai Ming-zhao  Peng Shao-hong   

  1. College of Chemical and Energy Engineering, South China Univ. of Tech. , Guangzhou 510640, Guangdong, China
  • Received:2005-03-28 Online:2006-03-25 Published:2006-03-25
  • Contact: 甘舸(1976-) ,男,博士生,主要从事化工过程传热与节能研究. E-mail:gegan@21cn. com
  • About author:甘舸(1976-) ,男,博士生,主要从事化工过程传热与节能研究.
  • Supported by:

    广东省科技计划项目(2003E32104)

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Abstract:

The introduction of vacuum pyrolysis into the treatment of waste p rint circuit board (WPCB) was first proposed in this paper. In order to lay a theoretical foundation for the batch treatment, the pyrolysis kineticswas investigated. Based on the differential thermo-gravimetry (DTG) curves of WPCB, the three stages of pyrolysis of WPCB were then discussed, and the corresponding kinetic parameterswere found, that is, the reaction order is 3, the average activation energy is 68. 001 kJ /mol, and the pre-exponent factor is 4. 67 ×107 min- 1. As compared with the pyrolysis in N2 , the pyrolysis activation energy in vacuum decreases by about 100 kJ /mol. Furthermore, there is little difference between the simulated DTG curves obtained by computer and by experiments.

Key words: waste print circuit board, vacuum pyrolysis, kinetics