THE EFFECT OF ADDITION OF A 3RD COMPONENT ON THE BEHAVIOR OF THE LITHIUM DOPED MAGNESIUM CATALYSTS FOR THE OXIDATIVE DEHYDROGENATION OF ETHANE

被引：39

作者：

SWAAN, HM ^{[1
]}

TOEBES, A ^{[1
]}

SESHAN, K ^{[1
]}

VANOMMEN, JG ^{[1
]}

ROSS, JRH ^{[1
]}

机构：

[1] TWENTE UNIV TECHNOL,7500 AE ENSCHEDE,NETHERLANDS

来源：

CATALYSIS TODAY | 1992年 / 13卷 / 04期

关键词：

D O I：

10.1016/0920-5861(92)80100-2

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The oxidative dehydrogenation of ethane was studied with the use of promoted Li/MgO catalysts at temperatures of 600-650-degrees-C. The addition of known promoters, cobalt and tin, gave a slight increase in activity but a strong decrease in selectivity to ethylene under the conditions used. The addition of sodium improved the selectivity to ethylene and suppressed the formation of carbon monoxide. Using a feed of 12 vol% ethane and 6 vol% oxygen, the Li/Na/MgO catalyst with 3.2wt% sodium showed a selectivity of 86% to ethylene at 38% conversion of ethane; the Li/MgO catalyst showed a selectivity of 80% at similar conversions Thermal investigations of the Li/Na/MgO catalyst showed that an eutectic melt of LiNaCO3 is formed at 490-degrees-C; the existence of this molten phase is probably the cause of the increased selectivity.

引用

页码：629 / 634

页数：6

共 14 条

[1] THE SELECTIVE DEHYDROGENATION OF ETHANE OVER SNO2-P2O5 CATALYSTS [J].