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SO42-/ZrO2-TiO2催化木糖制备糠醛的动力学研究

发表时间:2010-09-15  浏览量:1417  下载量:608
全部作者: 张俊华,林鹿
作者单位: 华南理工大学制浆造纸国家重点实验室
摘 要: 通过凝胶共沉法制备出SO42-/ZrO2-TiO2催化剂,并通过X射线衍射(X-ray diffraction, XRD)对其进行表征。将所制得的固体酸催化剂应用于木糖的催化脱水,结果表明:Zr/Ti物质的量比为7∶3的SO42-/ZrO2-TiO2催化剂在反应温度为463 K时反应240 min,糠醛得率可达到54%. 通过一级动力学反应模型可求得木糖的脱水反应动力学方程,其反应的活化能(E)和指前因子(A)分别为116.65 kJ·mol-1和2.5×1011 min-1.
关 键 词: 化学反应工程;生物燃料;木糖;糠醛;固体酸;动力学
Title: Conversion kinetics of D-xylose into furfural catalyzed by SO42-/ZrO2-TiO2
Author: ZHANG Junhua, LIN Lu
Organization: State Key Laboratory of Pulp and Paper Engineering, South China University of Technology
Abstract: SO42-/ZrO2-TiO2 catalysts were synthesized by co-precipitation method, and the solid catalysts were characterized by powder X-ray diffraction (XRD). The catalysts were used in the catalytic conversion of D-xylose to furfural. An optimized furfural yield of 54% was achieved in 240 min at the temperature of 463 K over SO42-/ZrO2-TiO2 with Zr/Ti mole ratio of 7∶3. With the assumption of first order kinetics equation, the decomposition kinetics of D-xylose was attended, and the evaluated activation energy (E) and pre-exponential factor (A) of D-xylose decomposition was 116.65 kJ·mol-1 and 2.5×1011 min-1, respectively.
Key words: chemical reaction engineering; biomass fuel; D-xylose; furfural; solid acid; kinetics
发表期数: 2010年9月第17期
引用格式: 张俊华,林鹿. SO42-/ZrO2-TiO2催化木糖制备糠醛的动力学研究[J]. 中国科技论文在线精品论文,2010,3(17):1800-1806.
 
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