The mechanism for thermal decomposition of cellulose and its main products
The mechanism for thermal decomposition of cellulose and its main products
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DOI：
10.1016/j.biortech.2009.06.095
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发表时间：
2009-12-01
影响因子：
11.4
通讯作者：
Gu, S.
中科院分区：
文献类型：
--
作者：
Shen, D. K.;Gu, S.
对纤维素的热解机理和主要产物的形成进行了实验研究。在升温速率为5-60K/min的条件下，用三维傅立叶变换红外光谱分析了气态产物的演化过程。利用由沸腾床反应器、碳过滤器、蒸汽冷凝系统和储气库组成的热解装置，研究了纤维素在不同温度(430-730℃)和不同停留时间(0.44-1.32 S)下的热解产物。用GC-MS对生物油的组成进行了表征，用气相色谱对气体样品进行了分析。考察了温度和停留时间对生物油主要产物(LG、5-HMF、FF、HAA、HA和PA)的影响。此外，从纤维素分子的直接转化和碎片的二次反应中开发了形成产物的可能路线。结果表明，随着温度的升高和停留时间的延长，CO的生成增加，而CO2的产率变化不大。(C)2009爱思唯尔有限公司。保留所有权利。
Experiment is performed to investigate the mechanism of the cellulose pyrolysis and the formation of the main products. The evolution of the gaseous products is examined by the 3-D FTIR spectrogram at the heating rate of 5-60 K/min. A pyrolysis unit, composed of fluidized bed reactor, carbon filter, vapour condensing system and gas storage, is employed to investigate the products of the cellulose pyrolysis under different temperatures (430-730 degrees C) and residence time (0.44-1.32 s). The composition in the bio-oil is characterized by GC-MS while the gases sample is analyzed by GC. The effects of temperature and residence time on the main products in bio-oil (LG, 5-HMF, FF, HAA, HA and PA) are examined thoroughly. Furthermore the possible routes for the formation of the products are developed from the direct conversion of cellulose molecules and the secondary reactions of the fragments. It is found that the formation of CO is enhanced with elevated temperature and residence time, while slight change is observed for the yield of CO2. (c) 2009 Elsevier Ltd. All rights reserved.