Preparation and Characterization of Supported H3PW12O40 and Supported Cesium-Substituted Dodecatungstophosphate

Zi Li Liu; Cui Xia Xu; Qian Wen Dai; Chao Xiang; Jian Jie Zhang

doi:10.4028/www.scientific.net/KEM.509.321

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Preparation and Characterization of Supported H₃PW₁₂O₄₀ and Supported Cesium-Substituted Dodecatungstophosphate
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 509Preparation and Characterization of Supported...

Preparation and Characterization of Supported H₃PW₁₂O₄₀ and Supported Cesium-Substituted Dodecatungstophosphate

Abstract:

Supported H₃PW₁₂O₄₀ (HPW) and supported Cesium-Substituted dodecatungsto-phosphate are eco-friendly solid acid catalysts. A series of different loading H₃PW₁₂O₄₀/SiO₂ and HPW/diatomite were prepared by a typical incipient wetness impregnation of methanol, meanwhile SiO2 and diatomite supported Cs-salt catalysts were prepared via two-step impregnating method. The catalysts were investigated by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). The results indicate that the Keggin structure of HPW is intact in the SiO₂-supported HPW and SiO₂-supported CsHPW. HPW and CsHPW are highly dispersed in the SiO₂ at the low loading, while the loading is more than 40% the catalyst grains increase and gather on the surface of the carrier. What's more, diatomite is not a suitable support. HPW and CsHPW have better distribution in the SiO₂ than in the diatomite. The activity of catalyst was tested in probe experiment of the alkylation of thiopene (TH) with 1-hexene.

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Periodical:

Key Engineering Materials (Volume 509)

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321-327

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.509.321

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Online since:

April 2012

Authors:

Zi Li Liu, Cui Xia Xu, Qian Wen Dai, Chao Xiang, Jian Jie Zhang

Keywords:

Alkylation, Cs-Salt Acid, Immobilisation, Phosphotungstic Acid

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