Pyrolysis of Glucose over Two Amphoteric Metal Oxides  

作　　者：YANG Yu XIANG Xi LUO Jia QI Wei-Yan YAN Hong-Peng LI Gui-Ying HU Chang-Wei 

机构地区：[1]Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China

出　　处：《Chemical Research in Chinese Universities》2009年第2期234-238,共5页高等学校化学研究（英文版）

基　　金：Supported by the National Basic Research Program of China(No. 2007CB210203);the Special Research Fund for the Doc-toral Program of Higher Education of China(No.20050610013);the Science Foundation of Sichuan Province, China (No.105JY029-025-2);the Funds for Innovative Research of Sichuan University, China.

摘　　要：The catalytic pyrolysis of glucose over amphoteric metal oxide, ZnO or γ-l2O3, was studied comparatively with direct pyrolysis. The effects of catalyst to glucose ratio on the yields of pyrolytic products and on the chemical composition of the liquid products were discussed. Compared with the pyrolytic products of direct pyrolysis, the amount of residual char decreased, whereas the gas yield increased in the presence of the catalysts. The highest liquid yield over ZNO（49.5%） was obtained when the ratio of ZnO to glucose was 5%, whereas over γ-Al2O3 the liquid yield increased with increasing the amount of γ-Al2O3 added. The presence of both the catalysts enhanced the selectivity to furans in liquid and reduced that of anhydro sugars. A selectivity of 69.7% to furans was obtained over 1% ZnO with a selectivity of 14.6% to 5-hydroxymethylfurfural（HMF）. The maximum selectivity to furans（74.9%） and that to HMF（25.6%） were obtained in the presence of 10% γ-Al2O3.The catalytic pyrolysis of glucose over amphoteric metal oxide, ZnO or γ-l2O3, was studied comparatively with direct pyrolysis. The effects of catalyst to glucose ratio on the yields of pyrolytic products and on the chemical composition of the liquid products were discussed. Compared with the pyrolytic products of direct pyrolysis, the amount of residual char decreased, whereas the gas yield increased in the presence of the catalysts. The highest liquid yield over ZNO（49.5%） was obtained when the ratio of ZnO to glucose was 5%, whereas over γ-Al2O3 the liquid yield increased with increasing the amount of γ-Al2O3 added. The presence of both the catalysts enhanced the selectivity to furans in liquid and reduced that of anhydro sugars. A selectivity of 69.7% to furans was obtained over 1% ZnO with a selectivity of 14.6% to 5-hydroxymethylfurfural（HMF）. The maximum selectivity to furans（74.9%） and that to HMF（25.6%） were obtained in the presence of 10% γ-Al2O3.

关 键 词：GLUCOSE ZnO Γ-AL2O3 FURANS 5-HYDROXYMETHYLFURFURAL 

分 类 号：TQ174.758[化学工程—陶瓷工业] TM862[化学工程—硅酸盐工业]