Catalytic Properties of SiO2 Supported ZnO Catalysts Prepared via Sol-gel and Impregnation Methods for Decomposition of Butan-2-ol

doi:10.7503/cjcu20120238

Abstract

Abstract:

ZnO-SiO₂ and ZnO/SiO₂ catalysts were prepared via sol-gel and impregnation methods, respectively. The catalysts were characterized and tested with the decomposition of butan-2-ol as a probe reaction, and the relationship between the state of the ZnO and the catalytic properties of the samples prepared via the two different methods was investigated. The results showed that ZnO nanoparticles were obtained in all the samples. The opposite selectivities for dehydration and dehydrogenation were observed on the ZnO-SiO₂ and ZnO/SiO₂ catalysts. Characterization results confirmed that the selectivity for dehydrogenation or dehydration had no obvious relation with the crystalsize, surface area and the surface acidity/basicity of samples. Further studies indicated that the different selectivities to the decomposition of butan-2-ol were caused by different states of ZnO on the surface of catalysts.

Key words: Sol-gel method, Impregnation method, Support, SiO₂, ZnO, Butan-2-ol

CLC Number:

O643.3

TrendMD:

ZHAI Shu-Bo, SUN Jing-Hui, GAO Shuang, YU Xue, HUO Wei-Tao, YAN Jian-Biao, LIU Yun-Ling, WANG Zhen-Lü. Catalytic Properties of SiO₂ Supported ZnO Catalysts Prepared via Sol-gel and Impregnation Methods for Decomposition of Butan-2-ol[J]. Chem. J. Chinese Universities, 2012, 33(10): 2282.

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Catalytic Properties of SiO₂ Supported ZnO Catalysts Prepared via Sol-gel and Impregnation Methods for Decomposition of Butan-2-ol

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