Studying the role of the state of platinum in Pt/SO4/ZrO 2/Al2O3 catalysts in the isomerization of n-hexane

被引：9

作者：

Smolikov M.D. ^{[1
,2
]}

Goncharov V.B. ^{[2
]}

Sadovskaya E.M. ^{[2
]}

Kazantsev K.V. ^{[1
]}

Zatolokina E.V. ^{[1
]}

Kir'yanov D.I. ^{[1
]}

Paukshtis E.A. ^{[2
]}

Bal'zhinimaev B.S. ^{[2
]}

Belyi A.S. ^{[1
,3
]}

机构：

[1] Institute of Hydrocarbon Processing, Siberian Branch, Russian Academy of Sciences, Omsk

[2] Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk

[3] Omsk State Technical University, Omsk

来源：

Catalysis in Industry | 2014年 / 6卷 / 02期

关键词：

Isomerization; Isotopic exchange; Platinum catalysts; Zirconia;

D O I：

10.1134/S2070050414020111

中图分类号：

学科分类号：

摘要：

Samples of SO4/ZrO2/Al2O3 and Pt/Al2O3 Pt/Al2O3 catalysts and their physical mixtures are pre-pared, and the catalytic properties of the samples in n-hexane isomerization are studied. The considerable effect of the state of platinum on the catalytic performance of the samples is revealed. IR spectroscopy (COads), oxygen chemisorption, and oxygen-hydrogen titration show that the reduced catalysts contain ionic forms of platinum capable of adsorbing up to three hydrogen atoms per each surface atom of platinum. By means of H/D isotopic exchange, it is found that specific properties of ionic platinum are apparent in the for-mation of the hydride form of adsorbed hydrogen. It is speculated that the activity and stability of catalysts based on sulfated zirconia in n-hexane isomerization can be attributed to the involvement of ionic and metal-lic platinum in the activation of hydrogen. The results can be used to develop effective catalysts for the isomer-ization of C5-C6 gasoline fractions in order to obtain the isomerizate as a high-octane additive for modern gasolines. © Pleiades Publishing, Ltd., 2014.

引用

页码：134 / 142

页数：8

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