Influence of Preparation Conditions on the Acidity of WO3/ZrO2 Solid Superacid

Abstract:

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WO3/ZrO2 solid superacid catalysts were prepared by coprecipitation and impregnation, then were characterized by XRD, N2 adsorption-desorption, Hammett indicator and pyridine chemisorption IR. The acid strength, acid type, acid volume, etc were compared under the different preparation conditions. The results indicated that the catalyst prepared by coprecipitation had stronger acid strength than the catalyst prepared by impregnation. The samples prepared by impregnation had more Lewis acid sites. With the increasing of the W/Zr ratio, the acid strength tended to increase at first and then decrease, and the catalyst with 10% WO3 loading amount had the strongest acidity. The higher the calcination temperature, the less the Lewis acid sites.

Info:

Periodical:

Advanced Materials Research (Volumes 233-235)

Edited by:

Zhong Cao, Lixian Sun, Xueqiang Cao, Yinghe He

Pages:

1502-1506

DOI:

10.4028/www.scientific.net/AMR.233-235.1502

Citation:

P. Xu et al., "Influence of Preparation Conditions on the Acidity of WO3/ZrO2 Solid Superacid", Advanced Materials Research, Vols. 233-235, pp. 1502-1506, 2011

Online since:

May 2011

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Price:

$35.00

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