One pot preparation of NiO/ZrO2 sulfated catalysts and its evaluation for the isobutene oligomerization

被引：25

作者：

Tzornpantzi, F. J. ^{[1
]}

Manriquez, M. E. ^{[1
]}

Padilla, J. M. ^{[1
]}

Del Angel, G. ^{[1
]}

Gomez, R. ^{[1
]}

Mantilla, A. ^{[2
]}

机构：

[1] Univ Autonoma Metropolitana Iztapalapa, Dept Chem, Mexico City 09340, DF, Mexico

[2] IPN, CICATA, Mexico City 11500, DF, Mexico

来源：

CATALYSIS TODAY | 2008年 / 133卷

关键词：

sulfated zirconia; nickel zirconia sulfated catalysts; olefins oligomerization; isopropanol dehydration; sol-gel zirconia catalysts; pyridine adsorption on sulfated zirconia;

D O I：

10.1016/j.cattod.2007.12.071

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The synthesis of NiO/ZrO2 sulfated catalysts prepared by the one pot method (sol-gel) is reported. Specific surface areas comprised between 52 and 108 m(2)/g were obtained. XRD patterns showed the presence of monoclinic and tetragonal zirconia phases. FTIR-pyridine absorption spectra show the presence of Lewis and Bronsted sites in sulfated zirconia but only Lewis sites in nickel zirconia sulfated catalysts. A good correlation between the amount of adsorbed pyridine and the catalytic activity for the isopropanol dehydration was observed. However, an opposite effect was observed for the isobutene oligomerization, where the catalysts with the lower acidity showed the higher activity. The role of Ni+2 diminishing the deactivation rate forming pi-allylic bonds with the olefins is discussed. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：154 / 159

页数：6

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