Advances in New and Renewable Energy

Recycling Reinforced Fibers from Waste Wind Turbine Blades: Process and Parameter Optimization for Improving Mechanical Strength of the Fiber

Chenghao WANG, Feng ZHU, Dezhen CHEN, Liu HONG

Advances in New and Renewable Energy, 2025, 13(1): 97-106. DOI: 10.3969/j.issn.2095-560X.2025.01.012

序号	脱碳温度/℃	保温时间/min	升温速率/(℃/min)	最大荷重/N
1	400	30	10	18.21
2	400	45	5	15.82
3	400	45	15	17.92
4	400	60	10	16.60
5	500	30	5	15.11
6	500	30	15	16.20
7	500	45	10	18.80
8	500	45	10	19.20
9	500	45	10	19.33
10	500	60	5	13.23
11	500	60	15	16.76
12	600	30	10	14.99
13	600	45	5	13.16
14	600	45	15	14.66
15	600	60	10	13.67

Table 4 Response surface test results

Other figure/table from this article

Table 1 Proximate and ultimate analysis of blade sample (dry basis)
Fig. 1 Schematic diagram of pyrolysis device
Table 2 Coding value and level
Fig. 2 TG and DTG curves of wind turbine blades: (a) N₂-10 °C/min; (b) O₂-10 °C/min
Table 3 Composition of the thermolytically produced gases
Fig. 3 The yield of each component of pyrolysis tar
Fig. 4 Optical microscopy images of recovered fibers: (a) WS4000; (b) 400 °C; (c) 500 °C; (d) 600 °C
Table 5 Fitting results of four models
Table 6 Variance analysis for regression model
Fig. 5 Comparison of the predicted and actual maximum load
Fig. 6 The response surface diagram of the effects of different factors on the maximum load of recovered fibers: (a) the effect of decarburization temperature and holding time on the maximum load; (b) the effect of decarburization temperature and heating rate on the maximum load; (c) the influence of holding time and heating rate on the maximum load
Fig. 7 Optical microscope image of recovered fibers after optimizing parameters
Fig. 8 Plot of ln(α/T²) versus 1000/T according to DAEM method
Table 7 Activation energy and pre-exponential factor at different conversion rates
Table 8 Energy balance for waste wind blade pyrolysis system
Fig. 9 DSC curve of pyrolysis fibers loaded with pyrolysis char at a heating rate of 10 °C/min under air