Hydrolysis of cellulose by amorphous carbon bearing SO3H, COOH, and OH groups
Hydrolysis of cellulose by amorphous carbon bearing SO3H, COOH, and OH groups
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DOI：
10.1021/ja803983h
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发表时间：
2008-09-24
影响因子：
15
通讯作者：
Hara, Michikazu
中科院分区：
文献类型：
--
作者：
Suganuma, Satoshi;Nakajima, Kiyotaka;Hara, Michikazu
研究了利用多种固体催化剂将纤维素水解成糖类的方法，以期在纤维素的无害环境糖化过程中有潜在的应用。结晶纯纤维素不能被传统的强固体Bronsted酸催化剂（如铌酸、h -丝光石、Nafion和Amberlyst-15）水解，而无定形含碳的SO3H、COOH和OH则是有效的催化剂。碳催化纤维素水解成葡萄糖的表观活化能估计为110 kJ mol(-1)，小于最佳条件下硫酸水解的表观活化能（170 kJ mol(-1)）。反应后，碳催化剂可以很容易地从糖溶液中分离出来，在反应中重复使用而不损失活性。碳催化剂的催化性能归因于材料吸附β -1,4葡聚糖的能力，而不吸附其他固体酸。
The hydrolysis of cellulose into saccharides using a range of solid catalysts is investigated for potential application in the environmentally benign saccharification of cellulose. Crystalline pure cellulose is not hydrolyzed by conventional strong solid Bronsted acid catalysts such as niobic acid, H-mordenite, Nafion and Amberlyst-15, whereas amorphous carbon bearing SO3H, COOH, and OH function as an efficient Catalyst for the reaction. The apparent activation energy for the hydrolysis of cellulose into glucose using the carbon catalyst is estimated to be 110 kJ mol(-1), smaller than that for sulfuric acid under optimal conditions (170 kJ mol(-1)). The carbon catalyst can be readily separated from the saccharide solution after reaction for reuse in the reaction without loss of activity. The catalytic performance of the carbon catalyst is attributed to the ability of the material to adsorb beta-1,4 glucan, which does not adsorb to other solid acids.