Superacids by metal oxides, IX.: Catalysis of WO3/ZrO2 mechanically mixed with Pt/ZrO2 for reaction of butane to isobutane

被引：45

作者：

Hino, M

Arata, K

机构：

[1] Hokkaido Univ Educ, Dept Sci, Hakodate, Hokkaido 040, Japan

[2] Hakodate Tech Coll, Hakodate, Hokkaido, Japan

来源：

APPLIED CATALYSIS A-GENERAL | 1998年 / 169卷 / 01期

关键词：

superacid; tungsten oxide; platinum; zirconium oxide; butane; isomerization;

D O I：

10.1016/S0926-860X(98)00012-X

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

An active catalyst for the skeletal isomerization of butane to isobutane was obtained by mechanically mixing WO3/ZrO2 and Pt/ZrO2. WO3/ZrO2 was prepared by impregnation of Zr(OH)(4) with aqueous ammonium metatungstate, followed by calcination in air at 700 degrees C (15 wt% W); Pt/ZrO2 was prepared by impregnation of the hydroxide with aqueous H2PtCl6 . 6H(2)O, followed by calcination at 700 degrees C (0.5 wt% Pt). The effect of mixing was specific to Pt/ZrO2; no effectiveness was found for Pt/TiO2, Pt/SiO2, Pt/Al2O3, Pt/Fe2O3, and Pt/SnO2. Pt-WO3/ZrO2 prepared by co-impregnation of zirconia with the W and Pt materials showed quite low activity; the first impregnation with Pt followed by W gave an activity value much higher than that obtained by the reverse order. XPS of Pt/ZrO2 showed the Pt species to be cationic, while those of Pt/TiO2, WSiO2, and Pt-WO3/ZrO2 were metallic. (C) 1998 Elsevier Science B.V.

引用

页码：151 / 155

页数：5

共 11 条

[1]

ARATA K, 1988, P 9 INT C CAT CALG 1, P1727

[2]

Chang C.D., 1996, U.S. Patent, Patent No. [5,543,036, 5543036]

[3]

CHANG CD, 1996, Patent No. 5510309

[4] SYNTHESIS OF A HIGHLY-ACTIVE SUPERACID OF PLATINUM-SUPPORTED ZIRCONIA FOR REACTION OF BUTANE [J].