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

被引：11

作者：

Chen, Dengyu ^{[1
]}

Liu, Xu ^{[1
]}

Zhu, Xifeng ^{[1
]}

机构：

[1] Univ Sci & Technol China, Key Lab Biomass Clean Energy Anhui Prov, Hefei 230026, Peoples R China

来源：

BIOMASS & BIOENERGY | 2013年 / 50卷

基金：

中国国家自然科学基金;

关键词：

Biomass; Effective moisture diffusivity; Non-isothermal method; TGA; Drying; DRYING KINETICS; THERMOGRAVIMETRIC ANALYSIS; ACTIVATION-ENERGY; STORAGE; PEPPER;

D O I：

10.1016/j.biombioe.2013.01.023

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

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. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：81 / 86

页数：6

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