期刊
CARBOHYDRATE POLYMERS
卷 98, 期 1, 页码 146-151出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2013.05.074
关键词
Hemicellulose; Cellulose; Hydrolysis; Hierarchical zeolites; Sulfonic group
资金
- National Natural Science Foundation of China [21143002, J1210060]
Sulfonated hierarchical H-USY zeolite was prepared and characterized by X-ray diffraction, N-2 physisorption, Fourier transform infrared spectroscopy, inductively coupled plasma atomic emission spectroscopy, temperature-programmed desorption of ammonia, and acid-base titration. It was proved that sulfonic group was successfully anchored onto the hierarchical H-USY zeolite. The acidity of the hierarchical H-USY was remarkably improved. Sulfonated hierarchical H-USY zeolite was efficient for the hydrolysis of hemicellulose and cellulose. The yield of TRS for hydrolysis of hemicellulose reached 78.0% at 140 C for 9 h. For hydrolysis of alpha-cellulose, 60.8% conversion with 22.4% yield of glucose was obtained. Even for microcrystalline cellulose, 43.7% conversion with 15.1% yield of glucose can be obtained. These results are much higher than those obtained over hierarchical H-USY zeolite, indicating that both the acidity and the pore structure determine the activity of zeolite as catalyst in the hydrolysis of biomass. (C) 2013 Elsevier Ltd. All rights reserved.
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