超低浓度马来酸催化水解纤维素的机理研究  

Research on mechanism of cellulose hydrolysis catalyzed by extremely low maleic acid

作　　者：王琼[1] 庄新姝[1] 余强[1,2] 亓伟[1,2] 袁振宏[1] 

机构地区：[1]中国科学院广州能源研究所,中国科学院可再生能源与天然气水合物重点实验室,广东广州510640 [2]中国科学院研究生院,北京100049

出　　处：《可再生能源》2011年第2期49-54,共6页Renewable Energy Resources

基　　金：国家自然科学基金项目(50776093);中国科学院可再生能源与天然气水合物重点实验室基金(O907j7)

摘　　要：将超低浓度马来酸应用于纤维素水解研究,对间歇条件下最优工况的产物和超低浓度硫酸水解纤维素产物与前人结果进行比较,初步探讨了马来酸水解纤维素的机理。试验在高温高压反应釜中进行,液固比为20∶1,转速为500 r/min,反应压力为4 MPa,改变温度和酸浓度,多点采样,结果发现,超低马来酸催化滤纸纤维素水解产糖效果较好,糠醛类降解产物明显少于硫酸催化。推导整合马来酸催化纤维素水解的基本原理,与常规无机酸催化相比,马来酸水解可同时遵循拟糖苷酶催化与一般酸催化机理,并能通过自身特性有效抑制还原糖的降解,从而获得较高的糖收率。The paper described the possible mechanism of cellulose hydrolysis catalyzed by maleic acid, by using the extremely low concentration of maleic acid （ELMA） in the hydrolysis of cellulose, analyzed the products of the optimal modes under intermittent condition, and compared the previous results with that from cellulose hydrolysis catalyzed by extremely low sulfuric acid. The experiment is carried out in the high temperature autoclave, the multi-point samples were taken out at different times, The background conditions were： liquid to solid ratio of 20：1 ,speed at 500 r/min,reaction pressure at 4MPa, with the changing of temperature and acid concentration. The results showed that the effect of cellulose hydrolysis catalyzed by ELMA is pretty good, with low yield rate of degradation products of furfural class by comparison with that of catalyzed by extremely low sulfuric acid. Maleic acid could follow the basic mechanism of glycosidase catalysis and acid catalysis; meanwhile, its own characteristic could suppress the degradation of reducing sugar and could realize a higher sugar yield.

关 键 词：马来酸 拟酶催化 定量滤纸 水解 

分 类 号：TK6[动力工程及工程热物理—生物能] S216.2[农业科学—农业机械化工程]