ACID-HYDROLYSIS OF CELLULOSE IN ZINC-CHLORIDE SOLUTION
ACID-HYDROLYSIS OF CELLULOSE IN ZINC-CHLORIDE SOLUTION
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DOI：
10.1007/bf02933408
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发表时间：
1995-03-01
影响因子：
3
通讯作者：
CHEN, LF
中科院分区：
文献类型：
--
作者：
CAO, NJ;XU, Q;CHEN, LF
糖收率低、预处理过程能耗高以及预处理剂回收困难等因素阻碍了纤维素材料向乙醇的高效转化。氯化锌可以提供在纤维素水解之前预处理生物质的替代方案。纤维素预处理过程中锌-纤维素复合物的形成提高了纤维素酶解和酸水解中葡萄糖的产率。纤维素在氯化锌溶液中的低温酸水解分两个阶段进行，即液化阶段和糖化阶段。由于第一阶段锌-纤维素复合物的形成，第二阶段所需的酸量已显着减少。在 67% 氯化锌溶液中，在 70°C 和 0.5 M 酸浓度下可溶性糖的产率为 99.5%。氯化锌与纤维素的比例由4.5降低到1.5，可溶性糖的得率保持在80%以上。水解速率受氯化锌与纤维素的比例、酸浓度和温度的影响。
The efficient conversion of cellulosic materials to ethanol has been hindered by the low yield of sugars, the high energy consumption in pretreatment processes, and the difficulty of recycling the pretreatment agents. Zinc chloride may provide an alternative for pretreating biomass prior to the hydrolysis of cellulose. The formation of a zinc-cellulose complex during the pretreatment of cellulose improves the yield of glucose in both the enzymatic and acid hydrolysis of cellulose. Low-temperature acid hydrolysis of cellulose in zinc chloride solution is carried out in two stages, a liquefaction stage and a saccharification stage. Because of the formation of zinc-cellulose complex in the first stage, the required amount of acid in the second stage has been decreased significantly. In 67% zinc chloride solution, a 99.5% yield of soluble sugars has been obtained at 70 degrees C and 0.5 M acid concentration. The ratio of zinc chloride to cellulose has been reduced from 4.5 to 1.5, and the yield of soluble sugars is kept above 80%. The rate of hydrolysis is affected by the ratio of zinc chloride to cellulose, acid concentration, and temperature.