期刊
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
卷 101, 期 -, 页码 142-149出版社
ELSEVIER
DOI: 10.1016/j.jaap.2013.01.018
关键词
Eucalyptus globulus; Pyrolysis; Polysaccharides; Levoglucosan; C/L ratio
资金
- Portuguese Science Foundation (FCT) [SFRH/BD/40060/2007]
- R&D project through FEDER/POCI Program [PTDC/AGR-CFL/110419/2009]
- [PEst-OE/AGR/UI0239/2011]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/40060/2007, PEst-OE/AGR/UI0239/2011] Funding Source: FCT
Eucalyptus globulus heartwood, sapwood and their delignified samples by kraft pulping at 130, 150 and 170 degrees C along time were characterized in respect to total carbohydrates by Py-GC/MS(FID). No significant differences between heartwood and sapwood were found in relation to pyrolysis products and composition. The main wood carbohydrate derived pyrolysis compounds were levoglucosan (25.1%), hydroxyacetaldehyde (12.5%), 2-oxo-propanal (10.3%) and acetic acid (8.7%). Levoglucosan decreased during the early stages of delignification and increased during the bulk and residual phases. Acetic acid decreased hydroxyacetaldehyde and 2-oxo-propanal increased, and 2-furaldehyde and hydroxypropanone remained almost constant during delignification. The C/L ratio was 3.2 in wood and remained rather constant in the first pulping periods until a loss of 15-25% in carbohydrate and 60% in lignin. Afterwards it increased sharply until 44 that correspond to the removal of 25-35% of carbohydrates and 95% of lignin. The pulping reactive selectivity to lignin vs. polysaccharides was the same for sapwood and heartwood. (C) 2013 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据