Catalytic performance of silicalite-1 modified HY zeolite in the hydrolysis of cellulose

被引：0
|
作者：
Yu J. [1 ,2 ,3 ]
Wang J.-Y. [2 ]
Wang Z. [2 ]
Zhou M.-D. [2 ]
Wang H.-Y. [1 ,2 ]
机构：
[1] College of Chemical Engineering, China University of Petroleum, Qingdao
[2] School of Chemistry and Materials Science, Liaoning Shihua University, Fushun
[3] Shenyang Paraffin Chemical Co Ltd, Shenyang
来源：
Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | 2018年 / 46卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Cellulose; Composite zeolite; Crystallization time; HY; Hydrolysis; Silicalite-1;
D O I：
10.1016/s1872-5813(18)30058-6
中图分类号：
学科分类号：
摘要：
A core-shell composite zeolite (HY/silicalite-1) was prepared by modifying HY zeolite with silicalite-1 and characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM), Transmission electron microscope (TEM), N2 sorption and IR spectra of pyridine adsorption (Py-FTIR); the catalytic performance of HY/silicalite-1 composite zeolite in the hydrolysis of cellulose was then investigated in comparison with that of HY. The results show that the crystallization time has a significant influence on the crystal growth of the HY/silicalite-1 composite zeolite and the relative content of two components. With the optimum crystallization time of 16-24 h, a core-shell structure for the HY/silicalite-1 composite zeolite is achieved, where the silicalite-1 crystal grows over the surface of HY zeolite; with the prolongation of the crystallization time, the morphology of the composite zeolite changes from rough turbid to smooth and eventually to scale-like surface. The amount of Brönsted acid sites decreases first and then increases with the increase of the crystallization time, whereas the amount of Lewis acid sites changes in the opposite direction. In particular, the HY/silicalite-1 composite zeolite obtained with a crystallization time of 24 h exhibits excellent catalytic performance in the hydrolysis of cellulose to glucose; over it, the yield of glucose reaches 45.8% at 130℃, much higher than the value of 28.0% over the HY zeolite. © 2018, Science Press. All right reserved.
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页码：1447 / 1453
页数：6
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