A Kinetic Study of Thermal-Oxidative Decomposition of Waste Polyurethane

폐폴리우레탄의 열적 산화분해에 대한 속도론적 연구

  • Jun, Hyun Chul (Department of Chemical Engineering, Hanyang University) ;
  • Oh, Sea Cheon (Department of Environmental Engineering, Kongju National University) ;
  • Lee, Hae Pyeong (School of Fire & Disaster Prevention, Kangwon National University) ;
  • Kim, Hee Taik (Department of Chemical Engineering, Hanyang University)
  • Received : 2006.04.03
  • Accepted : 2006.05.17
  • Published : 2006.06.10

Abstract

The kinetics of the thermal-oxidative decomposition of waste polyurethane (PU) according to oxygen concentration has been studied using a non-isothermal thermogravimetric technique at several heating rates from 10 to $50^{\circ}C/min$. A kinetic model accounting for the effects of the oxygen concentration by the differential and integral method based on Arrhenius equation was proposed to describe the thermal-oxidative decomposition of waste PU. To obtain the information on the kinetic parameters such as activation energy, reaction order, and pre-exponential factor, the thermogravimetric analysis curves and its derivatives have been analyzed using the kinetic analysis method proposed in this work. From this work, it was found that reaction orders for oxygen concentration had a negative sign, and activation energy decreased as the oxygen concentration increased. It was also found that the kinetic parameters obtained from the integral method using the single heating rate experiments varied with heating rates. Therefore, it is thought that the differential method using the multiple heating rate experiments more effectively represents the thermal-oxidative decomposition of waste polyurethane.

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