Disassembly of lignin and chemical recovery - rapid depolymerization of lignin without char formation in water-phenol mixtures
Disassembly of lignin and chemical recovery - rapid depolymerization of lignin without char formation in water-phenol mixtures
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DOI：
10.1016/j.fuproc.2003.11.027
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发表时间：
2004-07-15
影响因子：
7.5
通讯作者：
Adschiri, T
中科院分区：
文献类型：
--
作者：
Okuda, K;Umetsu, M;Adschiri, T
在673K的水-苯酚混合物中检查木质素的解聚。没有发现炭形成，并且在1小时的反应时间后99wt.％的产物可溶于四氢呋喃。我们通过凝胶渗透色谱法证实了木质素的解聚，结果显示产物的分子量分布比原始木质素更小。在0.1 h的反应时间内，平均分子量为2 100的木质素转化为平均分子量为660的化合物。随着反应时间的延长，高分子量化合物的量先减少，低分子量化合物的量增加。产品中的化学物质通过气相色谱框架电离检测器和质谱进行鉴定。这些结果表明苯酚和水在木质素解聚过程中的协同作用而不形成炭。 (C) 2004 Elsevier B.V. 保留所有权利。
Depolymerization of lignin was examined in a water-phenol mixture at 673 K. No char formation was found and the 99 wt.% of the products was soluble in tetrahydrofuran after a reaction time of I h. We confirmed depolymerization of lignin by gel permeation chromatography that showed smaller molecular weight distribution for products than that of original lignin. Within a reaction time of 0.1 h, lignin, whose average molecular weight was 2 100, was converted into compounds that have average molecular weight of 660. With reaction time, amount of the higher molecular weight compounds first decreased and that of lower molecular weight compounds increased. The chemical species in the products were identified by gas-chromatography-frame ionization detector and mass spectroscopy. These results indicate the synergistic effect of phenol and water in the depolymerization of lignin without char formation. (C) 2004 Elsevier B.V. All rights reserved.