Assessing the effect of size and shape factors on the devolatilization of biomass particles by coupling a rapid-solving thermal-thick model
发布时间：2025-10-16
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- 发布时间：
- 2025-10-16
- 论文名称：
- Assessing the effect of size and shape factors on the devolatilization of biomass particles by coupling a rapid-solving thermal-thick model
- 发表刊物：
- JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
- 摘要：
- In CFD modeling, while the isothermal assumption has conventionally been coupled for updating particle temperature, its applicability diminishes when dealing with thermally thick particles. A thermal-thick discrete phase model (DPM) is developed to simulate pyrolysis of biomass particle group at high heating rates and temperatures, with particles tracked in a Lagrangian scheme. The effects of particle size and shape on the volatile release and heating history are investigated. For spherical particles with a diameter of 9.6 mm, the temperature difference between the surface and center (∆T) does not disappear even up to 50 s. In the particle size range spanning from 200 μm to 9.6 mm, the duration required for a complete volatile release extends from 1.5 to 40 s. For cylindrical particles, in contrast to the particles with an aspect ratio (AR, ratio of particle length to diameter) of 1, the devolatilization time of particles with an AR of 15 can be shortened by more than 50 %. In addition, both the particle shape and size can significantly influence the volatile distribution within the reactor. This work contributes to understanding both the particle size and shape impact on heat and mass transfer during biomass pyrolysis at high heating rates.
- 合写作者：
- Zhang Jiaye, Wang Zhao, Dai Gaofeng, Heberlein Stephan, Chan Wei Ping, Wang Xuebin, Tan Houzhang, Lisak Grzegorz
- 卷号：
- 183
- 是否译文：
- 否
- 发表时间：
- 2024-10-01