Insight into product characteristics from microwave co-pyrolysis of low-rank coal and corncob: Unraveling the effects of metal catalysts

Wu, Lei; Guan, Yining; Li, Changcong; Zhou, Jun; Liu, Tiantian; Ye, Gan; Zhang, Qiuli; Song, Yonghui; Zhu, Ruiyu

doi:10.1016/j.fuel.2023.127860

Cited by 11 publications

(2 citation statements)

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“…To overcome these challenges related to conventional pyrolysis, MW-assisted pyrolysis has received a lot of attention owing to unique heating/volumetric heating (dielectric heating 10 ) and efficient methods. In this technology, MW radiation acts directly to the core of feedstock that MW energy converts into heat from the inner core to surface of feedstock owing to particle collusions via dipole polarization, ion conduction, and interfacial polarization, providing high energy utilization efficiency 11 . Therefore, this type of heating provides selective heating, higher heating rates which help to improve quality products and pyrolysis efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…Dielectric heating requires the materials to have higher MW absorbing or dielectric properties to reach pyrolysis temperature. However, biomasses and organic waste have low susceptibility towards MW irradiation and dielectric properties, which hinders to achieving the desired pyrolysis temperature and results in low energy utilization efficiency 11 , 13 .…”

Section: Introductionmentioning

confidence: 99%

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Unveiling the microwave heating performance of biochar as microwave absorber for microwave-assisted pyrolysis technology

Singh,

Lindenberger,

Chawade

et al. 2024

Sci Rep

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Microwave (MW) heating has gained significant attention in food industries and biomass-to-biofuels through pyrolysis over conventional heating. However, constraints for promoting MW heating related to the use of different MW absorbers are still a major concern that needs to be investigated. The present study was conducted to explore the MW heating performance of biochar as a low-cost MW absorber for performing pyrolysis. Experiments were performed on biochar under different biochar dosing (25 g, 37.5 g, 50 g), MW power (400 W, 700 W, 1000 W), and particle sizes (6 mm, 8 mm, 10 mm). Results showed that MW power and biochar dosing significantly impacted average heating rate (AHR) from 17.5 to 65.4 °C/min at 400 W and 1000 W at 50 g. AHR first increased, and then no significant changes were obtained, from 37.5 to 50 g. AHR was examined by full factorial design, with 94.6% fitting actual data with predicted data. The model suggested that the particle size of biochar influenced less on AHR. Furthermore, microwave absorption efficiency and biochar weight loss were investigated, and microwave absorption efficiency decreased as MW power increased, which means 17.16% of microwave absorption efficiency was achieved at 400 W rather than 700 W and 1000 W. Biochar weight loss estimated by employing mass-balance analysis, 2–10.4% change in biochar weight loss was obtained owing to higher heating rates at higher powers and biochar dosing.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%