Sulfonated hierarchical H-USY zeolite for efficient hydrolysis of hemicellulose/cellulose |
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Authors: | Lipeng Zhou Zhen Liu Meiting Shi Shanshan Du Yunlai Su Xiaomei Yang Jie Xu |
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Affiliation: | 1. College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Kexue Road, Zhengzhou 450001, PR China;2. State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, PR China |
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Abstract: | Sulfonated hierarchical H-USY zeolite was prepared and characterized by X-ray diffraction, N2 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 α-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. |
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Keywords: | Hemicellulose Cellulose Hydrolysis Hierarchical zeolites Sulfonic group |
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