A one-step non-isothermal method for the determination of effective moisture diffusivity in powdered biomass

作者：Chen Dengyu; Liu Xu; Zhu Xifeng^*

来源：Biomass and Bioenergy, 2013, 50: 81-86.

DOI：10.1016/j.biombioe.2013.01.023

• Biomass
• Effective moisture diffusivity
• Non-isothermal method
• TGA
• Drying

The effective moisture diffusivity (D-eff) is an important drying parameter. D-eff is usually calculated using a traditional two-step isothermal method. The current study presents a one-step non-isothermal method as a promising alternative for determining D-eff of biomass particles. Non-isothermal drying experiments were performed at various heating rates (2, 4, 6, 8, and 10 degrees C min (1)) from room temperature to 100 degrees C. Isothermal drying experiments were also performed to obtain D-eff at five temperatures (50, 60, 70, 80, and 90 degrees C) for comparison. All experiments were conducted using a thermogravimetric analyzer (TGA) due to its precise temperature control capability and accurate recording of mass loss. Thermal lag was significantly reduced under non-isothermal conditions, and the values obtained by the one-step non-isothermal method were in agreement with those obtained by isothermal procedures.

• 出版日期2013-3
• 单位中国科学技术大学