Influence of the zirconium precursor on the acidic and catalytic properties of sulfated zirconia catalysts prepared by sol-gel process

被引：2

作者：

Ben Hammouda, L. ^{[1
]}

Ghorbel, A. ^{[1
]}

机构：

[1] Univ Tunis El Manar, Fac Sci Tunis, LR01ES08 Chim Mat & Catalyse, Tunis 2092, Tunisia

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2019年 / 89卷 / 02期

关键词：

Sulfated zirconia; Sol-gel; Zirconium alkoxide; Isomerization; n-hexane; STEP AEROGEL PROCEDURE; N-BUTANE; ISOMERIZATION; TRANSFORMATION; HYDROISOMERIZATION; DEACTIVATION; SO4/ZRO2;

D O I：

10.1007/s10971-018-4877-6

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Sulfated zirconia catalysts were prepared using the sol-gel process. Hydrolysis water was produced in situ. The effects of the zirconium precursor on the physicochemical properties and the acidity of the solids have been investigated. The prepared catalysts were characterized by XRD, Raman spectroscopy, XPS, FTIR of adsorbed pyridine, physisorption of N-2 at 77 K, and TPR-H-2-MS. Pt-promoted catalysts were tested for n-hexane isomerization reaction and the influence of Pt amount on the stability was studied. Obtained solids exhibit low specific surface areas and narrow pore size distributions. In addition, the metastable tetragonal phase of ZrO2 was stabilized at a relatively high temperature. The acidity of catalysts prepared from different zirconium alkoxides and the magnitude of interaction between zirconia and sulfate species are compared and discussed.

引用

页码：543 / 552

页数：10

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