高温液态水中木糖无催化分解反应动力学  

Kinetics of Non-Catalyzed Decomposition of Xylose in High Temperature Liquid Water

作　　者：荆琪[1] 吕秀阳[1] 袁磊[1] 

机构地区：[1]浙江大学二次资源化工国家专业实验室,浙江杭州310027

出　　处：《化学反应工程与工艺》2006年第5期472-475,共4页Chemical Reaction Engineering and Technology

基　　金：科技部重大基础研究前期研究专项(2004CCA05500);国家自然科学基金(20476089);浙江省自然科学基金(Y405157)

摘　　要：研究了压力10MPa、温度180-120℃下木糖在高温液态水中的无催化分解反应动力学。实验结果表明，在无任何催化剂条件下，木糖能顺利进行分解反应。在实验范围内，木糖分解反应的活化能为123．27kJ／mol。另外，对不同温度下反应时间对木糖分解的主要产物糠醛收率的影响进行了考察。通过控制反应条件可以有选择性地调节产物分布。The kinetics of non-catalyzed decomposition of xylose in high temperature liquid water was studied for temperature from 453.15 K to 493. 15 K and under pressure of 10 MPa. The main products of xylose decomposition were furfural and formic acid. The evaluated activation energy of xylose decomposition was 123.27 kJ/mol. In addition, the effects of temperature and reaction time on the yield of furfural were shown. Selective decomposition of xylose in high temperature liquid water was possible by controlling reaction conditions.

关 键 词：高温液态水 木糖 分解 反应动力学 

分 类 号：O643.12[理学—物理化学] TQ036[理学—化学]