Optimising CFRP Recycling via Arrhenius-Type Kinetic Behaviour Analysis

Wei Y., Hadigheh S. A.

10th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering (CICE), İstanbul, Turkey, 8 - 10 December 2021, vol.198, pp.1110-1118 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 198
  • Doi Number: 10.1007/978-3-030-88166-5_97
  • City: İstanbul
  • Country: Turkey
  • Page Numbers: pp.1110-1118
  • Keywords: CFRP recycling, Pyrolysis, Thermal degradation, Activation energy, Arrhenius-type kinetic behaviour, THERMAL-DECOMPOSITION
  • Istanbul Technical University Affiliated: No


Pyrolysis method is one of the promising methods which can be used for reclaiming of clean carbon fibres from CFRP composites. To further improve this recycling method, kinetic behaviour of CFRP decomposition needs to be investigated. By monitoring and analysing the weight loss of CFRP during thermal degradation, the activation energy (E) of composites is determined by Arrhenius-type model-free (Friedman method) and curve fitting methods (Coats-Redfern method). Results show that the decomposition of the CFRP is a complex two-stage reaction. During the first stage, approximately 75% of epoxy matrix is removed. In this stage, pyrolysis of composite remains efficient up to around 425 degrees C where above 55% of resin is removed. Within this temperature range, analysis of kinetic energy confirms that a higher conversion rate and lower activation energy can be achieved by using lower heating rate. The outcomes contribute to optimisation of design parameters and development of highly efficient and cost effective CFRP recycling method using pyrolysis technique.