Microwave heating of silicon carbide and polypropylene particles in a fluidized bed reactor

Cui, Yunlei; Zhang, Yaning; Cui, Longfei; Zhao, Wei; Ahmad, Faizan

doi:10.1016/j.applthermaleng.2023.121009

Cited by 5 publications

(2 citation statements)

References 32 publications

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“…The initial temperature rise curves of the three groups, which had SiC particle sizes of 0.85 mm, 2 mm, and 3 mm, were basically the same, with the only difference being observed at the final temperature. Similarly, transient temperature drops were observed in several groups of experiments, and the same pattern was observed by Cui et al [46] during the microwave heating of polypropylene and SiC mixtures. When the SiC particle size was 0.06 mm, the particles were mainly distributed at the bottom of the reactor.…”

Section: Gas Component At Different Sic Sizesupporting

confidence: 81%

“…Although the small particles enhanced heat exchange with DWTBs, the overall heat absorption capacity of the system still needed to be improved. The heating rate of SiC is 15.6-77.2 times higher than that of plastic material under the same conditions [46]. Conversely, a larger particle size provided an enhanced heat absorption capacity.…”

Section: Temperature Rise Characteristic At Different Microwave Heati...mentioning

confidence: 86%

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Experimental Study on Microwave Pyrolysis of Decommissioned Wind Turbine Blades Based on Silicon Carbide Absorbents

Zhang,

Song,

Hou

et al. 2024

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The rapid expansion of the scale of wind power has led to a wave of efforts to decommission wind turbine blades. The pyrolysis of decommissioned wind turbine blades (DWTBs) is a promising technological solution. Microwave pyrolysis offers the benefits of fast heating rates and uniform heat transfer, making it a widely used method in various heating applications. However, there are few studies on the microwave pyrolysis of DWTBs, and pyrolysis characteristics under different boundary conditions remain unclear. In this paper, we investigate the pyrolysis characteristics of DWTBs by utilizing silicon carbide (SiC) particles as a microwave absorbent. The results demonstrated that, when the microwave heating power increased from 400 W to 600 W, the heating rate and pyrolysis final temperature of the material increased, resulting in a reduction in pyrolysis residual solid yield from 88.30% to 84.40%. At 600 W, pyrolysis gas components included C2H4, CH4, and CO, while the tar components included phenol and toluene. The highest degree of pyrolysis was achieved under the condition of an SiC particle size of 0.85 mm, with better heating performance, and the calorific value of the pyrolysis gas generated was 36.95 MJ/Nm3. The DWTBs did not undergo pyrolysis when SiC was not added. However, when the mass ratio of SiC to DWTBs was 4, the tar yield was 4.7% and the pyrolysis gas yield was 17.0%, resulting in a faster heating rate and the highest degree of pyrolysis. Based on this, an optimal process for the microwave pyrolysis of DWTBs was proposed, providing a reference for its industrial application.

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Section: Gas Component At Different Sic Sizesupporting

confidence: 81%

Section: Temperature Rise Characteristic At Different Microwave Heati...mentioning

confidence: 86%