Amorphous porous MxTi mixed oxides as catalysts for the oxidative dehydrogenation of ethylbenzene

被引：15

作者：

Li, WY ^{[1
]}

Lettmann, C ^{[1
]}

Maier, WF ^{[1
]}

机构：

[1] Max Planck Inst Kohlenforsch, D-45470 Mulheim, Germany

来源：

CATALYSIS LETTERS | 2000年 / 69卷 / 3-4期

关键词：

amorphous porous mixed oxides; catalyst; oxidative dehydrogenation; ethylbenzene; styrene;

D O I：

10.1023/A:1019065805580

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：

The properties of different metal-oxide-doped porous titanium oxides as catalysts for the oxidative dehydrogenation of ethylbenzene were investigated. Amorphous porous mixed oxides based on the amorphous titania matrix with selected metal ion centers as active sites have been prepared by an acid-catalyzed sol-gel method. The dehydrogenation of ethylbenzene was studied in a continuous gas phase flow reactor under different reaction temperatures at ambient pressure. Among the 23 catalysts studied the amorphous porous AM-Cr5Ti mixed oxide is the most promising catalyst. At 350 degrees C a 75% selectivity to styrene at a 29% conversion of ethylbenzene was obtained. BET, HRTEM, XRD, GC, MS, TGA and optical microscopy were employed to characterize the fresh and used AM-Cr5Ti catalyst.

引用

页码：181 / 188

页数：8

共 28 条

[1] Oxidative dehydrogenation of ethylbenzene with carbon dioxide on alkali-promoted Fe active carbon catalysts [J].