Embodied Energy in Pyrolysis and Solvolysis Approaches to Recycling for Carbon Fiber-Epoxy Reinforced Composite Waste Streams

Recycling

Uday K. Vaidya¹  Komal Kooduvalli¹  Soydan Ozcan²  John Unser² 

[1] Fibers and Composites Manufacturing Facility, The University of Tennessee, 1321 White Ave, Knoxville, TN 37996, USA;Institute for Advanced Composites Manufacturing Innovation (IACMI), 2360 Cherahala Blvd, Knoxville, TN 37932, USA;

关键词: recycling;    composites;    embodied energy;    pyrolysis;    solvolysis;    life cycle assessment;   

DOI  :  10.3390/recycling7010006

来源: DOAJ

【 摘 要 】

Carbon fiber composites are increasingly used in aerospace, motorcycles, sporting, and high-performance vehicles, and their end of life recycling is of growing interest. This study deals with the life cycle assessment (LCA) of carbon fiber reinforced plastics (CFRP) waste streams. The embodied energy (EE) of recycling CFRP via two viable methods—i.e., pyrolysis and solvolysis—is studied. Both pyrolysis and solvolysis were studied for EE with different variants. Alongside fiber recovery from CFRP, the pyrolysis process calculations consider energy recovery from syngas and oil produced within the system. For pyrolysis, electric furnace and natural gas were primarily considered. For solvolysis, different solvent scenarios were considered, including (a) deionized water, (b) water and potassium hydroxide, (c) acetone and water, and (d) water with acetic acid and potassium hydroxide. Energy reduction from one generation to the next has also been highlighted. The EE for recycling CFRP is quantified and discussed for these scenarios in this paper.

【 授权许可】

Unknown