GC-MS and IR spectroscopic analyses of the lignin-derived products from softwood and hardwood treated in supercritical water
GC-MS and IR spectroscopic analyses of the lignin-derived products from softwood and hardwood treated in supercritical water
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对超临界水处理的软木和硬木的木质素衍生产品进行 GC-MS 和红外光谱分析
DOI：
10.1007/s10086-004-0653-z
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发表时间：
2005
影响因子：
2.9
通讯作者：
S. Saka
中科院分区：
文献类型：
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作者：
K. Ehara;Daishi Takada;S. Saka
将软木（Cryptomeria japonica）和硬木（Fagus crenata）在超临界水（380°C，100MPa）中处理8秒。将处理过的木材分级为水溶性部分、甲醇可溶部分和甲醇不溶性残留物。对于主要由木质素衍生产物组成的甲醇可溶部分，分别进行凝胶渗透色谱（GPC）和气相色谱-质谱（GC-MS）分析以澄清分子量分布并鉴定单体产物。 GPC 分析表明，甲醇可溶部分含有单体和一些低聚产物。 GC-MS 分析在软木的甲醇可溶部分中鉴定出 19 种愈创木基化合物，在硬木的甲醇可溶部分中鉴定出 15 种紫丁香基单体化合物。鉴定产物的结构不仅包含苯基丙烷(C6-C3)单元，还包含C6-C2和C6-C1单元。此外，红外光谱表明，甲醇可溶部分保持了木质素的典型结构，尽管它富含缩合型键，并且丙基侧链发生了一些变化。这些结果表明，超临界水处理不仅裂解木质素中的醚键，而且裂解部分丙基链，产生各种芳香族化合物。
Softwood (Cryptomeria japonica) and hardwood (Fagus crenata) were treated in supercritical water (380°C, 100 MPa) for 8 s. The treated woods were fractionated to the water-soluble portion, methanol-soluble portion, and methanol-insoluble residues. For the methanol-soluble portion, which mainly consisted of lignin-derived products, gel permeation chromatography (GPC) and gas chromatographic-mass spectrometric (GC-MS) analyses were conducted to clarify the molecular weight distribution and to identify the monomeric products, respectively. GPC analysis revealed that the methanol-soluble portion contains monomeric and some oligomeric products. GC-MS analysis identified 19 guaiacyl compounds in the methanol-soluble portion from softwood, and 15 syringyl monomeric compounds in the methanol-soluble portion from hardwood. The structures of identified products included not only phenyl propane (C6—C3) units but also C6—C2and C6—C1units. In addition, the infrared spectra suggested that the methanol-soluble portion maintains the typical structure of lignin, although it is rich in condensed-type linkages with some changes in the propyl side chain. These results indicate that the supercritical water treatment cleaves not only ether linkages but also part of the propyl chains in lignin to give various aromatic compounds.
用于从木质纤维素生产生物乙醇的超临界水技术。
DOI：
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发表时间：
2006
期刊：
Proceedings of the Renewable Energy 2006
影响因子：
--
作者：
Satoshi Shimamura;Toshihito Yoshioka;Ryo Yamamoto;Susumu Hiraga;Takuji Nakamura;Shinji Shimada;Setsuko Komatsu;Satoshi Shimamura;島村 聡;阿部俊夫;阿部俊夫;阿部俊夫;阿部俊夫;阿部俊夫ほか;阿部俊夫;宮藤久士;宮藤久士;Hisashi Miyafuji
通讯作者：
Hisashi Miyafuji