化工学报 ›› 2012, Vol. 63 ›› Issue (5): 1437-1442.DOI: 10.3969/j.issn.0438-1157.2012.05.017

• 催化、动力学与反应器 • 上一篇    下一篇

微波作用下苄苯醚催化转移氢解反应动力学

熊俊,潘晶莹,吕秀阳   

  1. 浙江大学高压过程装备与安全教育部工程研究中心
  • 收稿日期:2011-07-27 修回日期:2012-01-06 出版日期:2012-05-05 发布日期:2012-05-05
  • 通讯作者: 吕秀阳

A kinetics study on microwave-assisted catalytic hydrogenolysis of benzyl phenyl ether

XIONG Jun,PAN Jingying,Lü Xiuyang   

  1. Engineering Research Center for High Pressure Process Equipment and Safety (MOE),Zhejiang University
  • Received:2011-07-27 Revised:2012-01-06 Online:2012-05-05 Published:2012-05-05

关键词: 木质素, 苄苯醚, 供氢剂, 微波, 催化转移氢解反应, 反应动力学

Abstract: With benzyl phenyl ether(BPE) as a model compound of lignin,catalytic hydrogenolysis kinetics of benzyl phenyl ether via hydrogen-transfer was studied at the temperature of 413.15—443.15 K,using toluene-4-sulfonic acid (PTSA)as catalyst and 1,2,3,4-tetrahydronaphthalene as hydrogen-donor solvent.Batch reactors with and without microwave-assisted were employed.The first order kinetic model was used to fit the kinetics data.The results indicated that for microwave-assisted reactor,conversion of BPE was greatly improved with increase of PTSA and 1,2,3,4-tetrahydronaphthalene concentration.When both concentrations are 0.1 g·ml-1,apparent activation energies of BPE hydrogenolysis reaction estimated were 52.45 kJ·mol-1 for microwave-assisted reactor and 87.82 kJ·mol-1 for batch one,which means that microwave can make activation energy of hydrogenolysis reaction greatly decrease.This work may provide an alternative way for large-scale utilization of lignin.

Key words: lignin, benzyl phenyl ether, hydrogen-donor solvent, microwave;catalytic transfer hydrogenation;kinetics

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