The densification of bio-char: Effect of pyrolysis temperature on the qualities of pellets

被引：95

作者：

Hu, Qiang ^{[1
]}

Yang, Haiping ^{[1
]}

Yao, Dingding ^{[1
]}

Zhu, Danchen ^{[1
]}

Wang, Xianhua ^{[1
]}

Shao, Jingai ^{[1
]}

Chen, Hanping ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 430074, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2016年 / 200卷

基金：

中国国家自然科学基金;

关键词：

Bio-char; Pelletization; Pyrolysis temperature; Quality; Bonding mechanism; BLACK CARBON DECOMPOSITION; FUEL PELLETS; BIOMASS; TORREFACTION; BIOCHAR; PELLETIZATION; POLYGENERATION; COMBUSTION; STRENGTH; HARDNESS;

D O I：

10.1016/j.biortech.2015.10.077

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The densification of bio-chars pyrolyzed at different temperatures were investigated to elucidate the effect of temperature on the properties of bio-char pellets and determine the bonding mechanism of pellets. Optimized process conditions were obtained with 128 MPa compressive pressure and 35% water addition content. Results showed that both the volume density and compressive strength of bio-char pellets initially decreased and subsequently increased, while the energy consumption increased first and then decreased, with the increase of pyrolysis temperature. The moisture adsorption of bio-char pellets was noticeably lower than raw woody shavings but had elevated than the corresponding char particles. Hydrophilic functional groups, particle size and binder were the main factors that contributed to the cementation of bio-char particles at different temperatures. The result indicated that pyrolysis of woody shavings at 550-650 degrees C and followed by densification was suitable to form bio-char pellets for application as renewable biofuels. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：521 / 527

页数：7

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