Characterization of Thermally Decomposed Cellulose and Red Pine at 200.DEG.C. in Water.
Characterization of Thermally Decomposed Cellulose and Red Pine at 200.DEG.C. in Water.
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200℃下热分解纤维素和红松的表征
DOI：
10.3775/jie.75.829
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
Tooru Wainai
中科院分区：
文献类型：
--
作者：
Y. Sugimoto;Y. Miki;K. Hayamizu;S. Umeda;Takahiro Komano;K. Mashimo;Tooru Wainai
纤维素和红松在200°C的水中热分解，以澄清煤的起源和形成。气相和水溶性产物通过GC和1H-NMR分析，而水不溶性固体产物的结构考虑通过元素分析、CP/MAS 13 C-NMR和官能团分析进行。在200°C下，纤维素逐渐转化为水、二氧化碳、水溶性和水不溶性棕色物质。20小时后产品分布没有变化。20 h后褐色残渣的~（13）C-NMR谱与Morwell褐煤相似，表明纤维素在200°C水合热解过程中形成了多环芳烃结构。红松含水热解残渣（50 h和100 h）的~（13）C-NMR谱与Morwell煤化原木的~（13）C-NMR谱相似。根据分析数据获得了含水热解残渣（50 h）、Morwell褐煤和Morwell煤化原木的部分模型结构，如图8所示。结果表明，在200°C的含水热解条件下，纤维素和木材在20 h内即可转化为褐煤状物质。
Cellulose and red pine were thermally decomposed in water at 200°C in order to clarify the origin and formation of coal. The gaseous and water-soluble products were analyzed by GC and 1H-NMR, while the structural consideration of the water-insoluble solid products was performed by elemental analyses, CP/MAS 13C-NMR and functional group analyses. Morwell brown coal and Morwell coalified log were also analyzed by the same methods.Cellulose was gradually converted at 200°C into water, carbon dioxide, water-solubles and water-insoluble brownish materials. The product distribution did not change after 20hours. The 13C-NMR spectra of the brownish residues after 20hours were similar to that of Morwell brown coal, which indicated that polycyclic aromatic structures should be formed from cellulose during the hydrous pyrolysis at 200°C. The 13C-NMR spectra of the hydrous pyrolysis residues (50hr and 100hr) of red pine were similar to that of Morwell coalified log.The partial model structures of the hydrous pyrolysis residues (50hr), Morwell brown coal, and Morwell coalified log were obtained from the analytical data as shown in Fig. 8. The results showed that the hydrous pyrolysis at 200°C could transform cellulose and wood to brown coal-like materials in only twenty hours.