Material conversion and application of cellulosic materials by microwave irradiation in the presence of poly acids

在本研究中发现，在钨硅酸存在下，微波辐射对纤维素进行直接糖化，可得到高效率的葡萄糖。以钨硅杂多酸为催化剂，考察了晶体结构和溶剂对微波直接糖化反应的影响。以水和乙醇为混合溶剂，可进行直接糖化反应，糖产率高达80%。钨水杨酸的预处理对提高产糖率是有效的。在钨水杨酸存在下，纤维素在微波辐射下的直接糖化反应强烈依赖于钨水杨酸晶体中的水量及其性质。结果表明，采用合适的工艺条件，可获得极高的产糖率。纤维素直接糖化为葡萄糖的最高产率可达99%。

In the present study, it is discovered that microwave irradiation to cellulose in the presence of tungstosilicic acid gave glucose (direct saccharification) with highly efficiency. The effects of crystal structure as well as solvent onto direct saccharification by microwave irradiation in the presence of hetero-poly acids such as tungstosilicic acid were investigated. The mixed solvent of water and ethanol could proceed the direct saccharification with highly glucose yield of 80%. The pretreatment on tungstocilicic acid is effective to improve the glucose yield. The direct saccharification of cellulose by the microwave irradiation in the presence of tungstocilicic acid depends strongly on the amount of water and its characteristics in the crystalline of tungstocilicic acid. Thus, it was found that the extremely high glucose yield can be achieved when the suitable condition was adopted. The highest yield of direct saccharification from cellulose to glucose reached 99%.