共 11 条
[11]
White RH., 2001, ENCY MAT SCI TECHNOL, VSecond, P9712
Torrefaction of wood - Part 2. Analysis of products
被引：473
作者：
Prins, Mark J.
[1
]
Ptasinski, Krzysztof J.
[1
]
Janssen, Frans J. J. G.
[1
]
机构：
[1] Eindhoven Univ Technol, Environm Technol Grp, Dept Chem Engn & Chem, NL-5600 MB Eindhoven, Netherlands
关键词：
thermal analysis;
torrefaction;
pyrolysis;
pyrolysis products;
wood;
lignocellulosic fuels;
D O I：
10.1016/j.jaap.2006.01.001
中图分类号：
O65 [分析化学];
学科分类号：
070302 ;
081704 ;
摘要：
Torrefaction is a mild pyrolysis process carried out at temperatures ranging from 225 to 300 degrees C, in which hemicellulose, the most reactive fraction of wood, is decomposed. Dehydration and decarboxylation reactions cause a mass loss of the wood, whereas the lower heating value of the wood is largely conserved. Deciduous wood types (beech and willow) and straw were found to produce more volatiles than coniferous wood (larch), especially more methanol and acetic acid. These originate from acetoxy- and methoxy-groups present as side chains in xylose units present in the xylan-containing hemicellulose fraction. The torrefied wood product has a brown/black color, reduced volatile content and increased energy density: 20.7 MJ/kg (after 15 min reaction time at 270 degrees C) versus 17.7 MJ/kg for untreated willow. It has favorable properties for application as a fuel for gasification and/or (co-)combustion. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：35 / 40
页数：6
相关论文