催化学报 ›› 2014, Vol. 35 ›› Issue (5): 622-630.DOI: 10.1016/S1872-2067(14)60039-5

• 研究论文 • 上一篇    下一篇

TS-1/H2O2碱溶液中低温氧化愈创木酚制备马来酸

苏际, 杨丽莎, Reed Nicholas Liu, 林鸿飞   

  1. 内华达大学化学与材料工程学院, 美国内华达州89557
  • 收稿日期:2014-01-21 修回日期:2014-01-23 出版日期:2014-04-18 发布日期:2014-04-24
  • 通讯作者: 林鸿飞

Low-temperature oxidation of guaiacol to maleic acid over TS-1 catalyst in alkaline aqueous H2O2 solutions

Ji Su, Lisha Yang, Reed Nicholas Liu, Hongfei Lin   

  1. Department of Chemical and Materials Engineering, University of Nevada, Reno 1664 N. Virginia St. M/S388, Reno, NV 89557, USA
  • Received:2014-01-21 Revised:2014-01-23 Online:2014-04-18 Published:2014-04-24

摘要:

可再生生物质资源的开发与利用能够缓解化石燃料产生的温室气体对环境的负面影响. 在生物质燃料制备过程中联产高附加值化学品能大幅提高生物质炼制的经济性. 愈创木酚是常见的木质纤维素快速热解产物. 本文研究了低温液相氧化愈创木酚制备马来酸,并重点考察了催化剂添加量、pH值、反应时间和反应温度等反应条件的影响. 研究发现,在钛硅沸石-过氧化氢碱溶液氧化反应体系中(80 ℃,pH = 13.3),20-30 mol%的愈创木酚可以选择性转化为马来酸. 同时初步探讨了愈创木酚氧化开环转化为马来酸的反应机理.

关键词: 生物质, 木质素, 愈创木酚, 氧化, 马来酸, TS-1, 过氧化氢, 羧酸

Abstract:

To mitigate the negative environmental impact of greenhouse gas (GHG) emission originated from the use of fossil fuels, the chemical world is switching to utilize renewable biomass resources. Co-producing value-added chemicals is important for an integrated biorefinery to improve economics of biofuels. Lignin derived compounds, e.g. guaiacol, are common by-products of fast pyrolysis of lignocellulosic biomass. In this paper, the feasibility of low-temperature selective oxidation of guaiacol to value-added dicarboxylic acids, e.g. maleic acid, was investigated using titanium silicalite/hydrogen peroxide (TS-1/H2O2) reaction system. Under the reaction conditions (80 ℃ and the initial pH = 13.3), the molar yields of maleic acid from guaiacol were approximately 20%-30%. The effects of catalyst amount, initial pH values, reaction time, and temperature on the yields of maleic acid were investigated. A possible reaction mechanism of TS-1 catalyzed aromatic ring opening was proposed.

Key words: Biomass, Lignin, Guaiacol, Oxidation, Maleic acid, TS-1, Hydrogen peroxide, Carboxylic acid