Combination of Brønsted and Lewis Polymeric Catalysts for Efficient Conversion of Cellulose into 5-Hydroxymethylfurfural (HMF) in Ionic Liquids

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• 作者：Yating Shen ; Yunlei Zhang ; Yao Chen ; Prof. Yongsheng Yan ; Prof. Jianming Pan ; Meng Liu and Prof. Weidong Shi
• 刊名：Energy Technology
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：4
• 期：5
• 页码：600-609
• 全文大小：1904K
• ISSN：2194-4296

文摘

Stable oil-in-water high internal phase emulsions (HIPEs) with an internal phase volume fraction of 85 % were stabilized using Tween 85. The prepared poly(HIPEs) were first investigated as adsorbents to treat water polluted with Cr^III, and then the catalysts with Lewis acidic sites was synthesized. The catalysts with Brønsted acidic sites were obtained by ion-exchanging. The as-prepared HIPEs–Cr^III (PEs–Cr^III) and HIPEs–SO₃H (PEs–SO₃H) possess open-cell structure, interconnecting pores, and strong acidity, they are utilized as highly efficient catalysts for the conversion of biomass to 5-hydroxymethylfurfural (HMF). These results showed maximum production yields for cellulose, glucose, and fructose of 37.0 %, 58.0 %, and 80.8 %, respectively. PEs–Cr^III and PEs–SO₃H can be very easily recycled at least four times without significant loss of activity. Herein, a new method is presented to transform cellulose by using two catalysts in a one-pot process for meeting the varying demands involved at different reaction stages.