Highly Selective Supported Alkali Chloride Catalysts for the Oxidative Dehydrogenation of Ethane

被引：7

作者：

Gaertner, Christian A. ^{[1
,2
]}

van Veen, Andre C. ^{[1
,2
]}

Lercher, Johannes A. ^{[1
,2
]}

机构：

[1] Tech Univ Munich, Dept Chem, D-85747 Garching, Germany

[2] Tech Univ Munich, Catalysis Res Ctr, D-85747 Garching, Germany

来源：

TOPICS IN CATALYSIS | 2014年 / 57卷 / 14-16期

关键词：

Supported mixed chloride catalysts; Ethane oxidative dehydrogenation; PROPANE; ALKANES; LICL;

D O I：

10.1007/s11244-014-0277-5

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Binary, ternary and quaternary molten eutectic alkali chloride catalysts, supported on mildly redox active oxides, were investigated for the oxidative dehydrogenation of ethane. The influence of different support oxides, on the catalytic performance, as well as that of different anions (bromide vs. chloride) and cations in a chloride eutectic system were studied. Metal oxides which react with chlorides are not suitable and lead to substantial deactivation. Especially supports forming volatile chlorides induce irreversible chloride depletion. Bromides catalyze oxidative dehydrogenation of ethane with higher rates, but lower olefin selectivities, highlighting the similarities and differences of Cl- and Br- in the redox cycle. Two catalysts were identified having olefin selectivities up to 98 % at 70 % ethane conversion, which ranges among the highest selectivities reported for ethane ODH.

引用

页码：1236 / 1247

页数：12

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