Oxidative liquefaction as an alternative method of recycling and the pyrolysis kinetics of wind turbine blades

Hamza Mumtaz, Szymon Sobek, Marcin Sajdak, Roksana Muzyka, Sabina Drewniak and Sebastian Werle

Energy, 2023, vol. 278, issue PB

Abstract: Oxidative liquefaction of wind turbine blades (WTBs) is carried out in a controlled environment having temperature ranges of 250–300 °C, pressure 20–40 bar, oxidant concentration of 15–45%, a reaction time of 30–90 min, and a waste-to-liquid ratio of 5–25 %wt. Fourier transform infrared spectroscopy (FTIR) in the wavenumber range from 650 to 3200 cm−1, analytical pyrolysis at 500 °C was performed. Thermogravimetric analysis (TGA) was employed at a temperature range of 30–800 °C at heating rates of 2, 4, 8, and 16 K/min. The kinetics of WTBs pyrolysis were analyzed using the Fraser-Suzuki (FS) deconvolution method and a model-based kinetic modeling procedure. Oxidative liquefaction resulted in higher resin degradation of WTBs and the production of liquid chemical compounds. Gas chromatography with flame ionization detection (GC-FID) was used to investigate the insight into these chemical compounds which were mostly fatty acids. The resin degradation yield was found to be in the range of 55–100% while volatile fatty acid (VFA) concentrations were from 28.90 to 210.59 g/kg-WTBs. In addition, analysis of variance (ANOVA) have been performed to provide the optimal reaction conditions to maximize the process outputs and minimize the energy consumption to make the process economically feasible.

Keywords: Recycling of wind turbine blades; Oxidative liquefaction; Kinetic analysis; Resin degradation yield; Volatile fatty acids production; Optimal reaction conditions (search for similar items in EconPapers)
Date: 2023
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:278:y:2023:i:pb:s0360544223013440

DOI: 10.1016/j.energy.2023.127950

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