Decomposition of cellulose in near-critical water and fermentability of the products
Decomposition of cellulose in near-critical water and fermentability of the products
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DOI：
10.1021/ef950160
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发表时间：
1996-05-01
期刊：
影响因子：
5.3
通讯作者：
Hayashi, N
中科院分区：
文献类型：
--
作者：
Sakaki, T;Shibata, M;Hayashi, N
通过加热密封反应器，将纤维素和水放入保持在305、355或405℃的盐浴中，研究了纤维素在近临界水中的非催化分解特性。纤维素迅速分解为水溶性物质(WS)，当WS收率达到接近80%时，WS进一步分解。通过将处理温度提高到355℃以上，获得最大WS产量的加热时间缩短至15s以下。在WS形成过程中，优先发生水解，在355℃的浴中处理15s，葡萄糖产率达到40%。进入第二个分解过程时，WS转化为气态产物和甲醇可溶产物，并由液相形成焦炭状固体产物。对在WS形成过程中获得的纤维素的水解产物进行发酵试验，并且确认所形成的葡萄糖转化为乙醇。
The noncatalytic decomposition characteristics of cellulose in near-critical water were examined by heating a sealed reactor in which the cellulose and water were charged in a salt bath kept at 305, 355, or 405 degrees C. Cellulose was rapidly decomposed to water solubles (WS), and the WS was further decomposed after the WS yield reached nearly 80%. The heating time giving the maximum WS yield was shortened to under 15 s by increasing the treatment temperature to over 355 degrees C. In the WS formation process, hydrolysis preferentially occurred, and the glucose yield reached 40% by the treatment for 15 s in the bath kept at 355 degrees C. On entering the second decomposition process, the WS was converted to gaseous products and methanol-soluble products, and char-like solid products were formed from the liquid phase. The hydrolysate of cellulose obtained in the WS formation process was subjected to a fermentation test, and the formed glucose was confirmed to be converted to ethanol.