RECYCLING OF AEROSPACE CFRP COMPOSITES THROUGH PYROLYSIS


Günerhan A., Değirmenci H., Güven T. B., Altuntaş Ö.

INTERNATIONAL CONFERENCE OF AERONAUTICS AND ASTRONAUTICS (ICAA’24), Konya, Türkiye, 6 - 08 Kasım 2024, ss.5-6

  • Yayın Türü: Bildiri / Özet Bildiri
  • Basıldığı Şehir: Konya
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.5-6
  • Kocaeli Üniversitesi Adresli: Evet

Özet

This study explores the recycling of end-of-life carbon fiber reinforced polymer (CFRP) composites, which are widely used in aerospace due to their lightweight and superior mechanical properties. The study focuses on the challenges and benefits of pyrolysis recycling, which involves separating epoxy resin and carbon fibers. The epoxy resin, which accounts for 40% of CFRP, evaporates into liquid and gas phases during pyrolysis, leaving carbon fibers and char attached to the carbon fiber surface. The yield of solid, liquid, and gaseous products depends on pyrolysis parameters such as temperature, residence time, and heating rate. High temperature increases the pyrolysis gas yield, with most of the gas being valuable H2. However, high temperature and residence time can adversely affect the mechanical properties of carbon fibers, making it crucial to determine the optimum temperature and residence time. The char formed on the carbon fibers' surface can be removed through oxidation, improving the tensile strength and modulus of the recovered carbon fibers. This allows for the production of high-value gas with high H2 content and recovered carbon fibers with high tensile strength and modulus for waste CFRP.