Zn-Ca-Fe氧化物催化水解微晶纤维素  

Hydrolysis of Microcrystalline Cellulose over Zn-Ca-Fe Oxide Catalyst

作　　者：张帆[1,2] 邓欣[2] 方真[2] 曾虹燕[1] 田霄飞[2] Janusz A.Kozinski 

机构地区：[1]湘潭大学化工学院,湖南湘潭411105 [2]中国科学院西双版纳热带植物园生物能源组,云南昆明650223 [3]York University,Department of Earth and Space Science and Engineering,Toronto,Canada M3J1P3

出　　处：《石油化工》2011年第1期43-48,共6页Petrochemical Technology

基　　金：中国科学院知识创新工程重要方向性项目(KSCX2-YW-G-075);国家自然科学基金资助项目(21076220)

摘　　要：以尿素为沉淀剂制备了一系列复合金属沉淀物,将其在高温条件下煅烧获得一系列复合金属氧化物固体催化剂,并将其用于催化微晶纤维素的水解反应;考察了反应温度、反应时间、搅拌转速、催化剂用量和微晶纤维素用量对反应的影响。实验结果表明,在反应温度160℃、反应时间20 h、搅拌转速400 r/mnin、微晶纤维素2.0 g、Zn-Ca-Fe氧化物0.9 g和H_2O 200 mL的条件下,微晶纤维素的转化率高达42.56%,葡萄糖的收率为69.20%,且微晶纤维素水解液为中性溶液。在相同反应条件下,Zn-Ca-Fe氧化物可重复使用5次,其催化活性无明显降低。A series of composite metal oxides were prepared through coprecipitation with urea as a precipitator and calcination at high temperature, and were used as catalysts in hydrolysis of microcrystalline cellulose to glucose. Performances of the catalysts in the hydrolysis were tested. Results showed that Zn-Ca-Fe oxide was an excellent catalyst. Under the reaction condition of temperature 160℃, reaction time 20 h, stirring speed 400 r/min, microcrystalline cellulose dosage 2.0 g, Zn-Ca-Fe oxide catalyst dosage 0. 9 g and H20 200 mL, conversion of microcrystalline cellulose and yield of glucose in the hydrolysis were 42. 56 % and 69. 20 %, respectively. The hydrolysate solution was still neutral after the reaction. The Zn-Ca-Fe oxide could be reused for 5 times under the above conditions without obvious catalyst deactivation.

关 键 词：微晶纤维素 催化水解 锌-钙-铁氧化物催化剂 

分 类 号：TQ230.2[化学工程—有机化工]