Formation of tar and its characterization during air-steam gasification of sawdust in a fluidized bed reactor
Formation of tar and its characterization during air-steam gasification of sawdust in a fluidized bed reactor
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流化床反应器中木屑空气-蒸汽气化过程中焦油的形成及其表征
DOI：
10.1016/j.fuel.2009.08.009
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发表时间：
2010-07-01
期刊：
影响因子：
7.4
通讯作者：
Li, Wen-Ying
中科院分区：
文献类型：
--
作者：
Qin, Yu-Hong;Feng, Jie;Li, Wen-Ying
锯末焦油是在常压下在流化床反应器中进行空气-蒸汽气化产生的。以气化温度和水蒸汽与木屑的质量比为可调变量，研究了木屑焦油生成量和焦油性质。采用凝胶渗透色谱-二极管阵列检测器联用技术对焦油进行分析。结果表明，在实验条件下，焦油的分子量分布（MWD）基本不变。焦油的主要成分是芳香族化合物、具有共轭键的石蜡和烯烃。焦油分子量（MW）取决于氢自由基的量，这与气化过程中加入的蒸汽有关。水蒸气会阻碍聚合反应，生成更多的共轭侧链化合物。最后，从焦油的结构特征描述了木屑焦油的形成过程。(C)2009爱思唯尔有限公司版权所有。
The sawdust tar was generated from air-steam gasification in the fluidized bed reactor at atmospheric pressure. The gasification temperature and mass ratio of steam to sawdust were used as adjustable variables with which the amount of sawdust tar formation and the corresponding tar properties. Gel permeation chromatography (GPC) coupled with diode array detector (DAD) was employed to analyze the tar. It was found that the molecular weight distribution (MWD) of tar was unchanged under investigated conditions. The majority of the tar components are aromatic compounds, paraffin with conjugated bonds and olefin. Tar molecular weight (MW) depends on the H free radical amount, which is related to the steam added during the gasification. The steam can prevent the polymerization reaction and more conjugated side-chain compounds would be formed. In the end, the sawdust tar formation process has been described from the tar structure obtained. (C) 2009 Elsevier Ltd. All rights reserved.