Dehydrogenation of methoxyisopropanol to methoxyacetone on supported bimetallic Cu-Zn catalysts

被引：0
|
作者：
Landau, MV [1 ]
Kogan, SB [1 ]
Herskowitz, M [1 ]
机构：
[1] Ben Gurion Univ Negev, Blechner Ctr Ind Catalysis & Proc Dev, IL-84105 Beer Sheva, Israel
来源：
HETEROGENEOUS CATALYSIS AND FINE CHEMICALS IV | 1997年 / 108卷
关键词：
D O I：
暂无
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：
Dehydrogenation of methoxyisopropanol (MOIP) on reduced Cu-Zn catalysts was studied in a fixed bed reactor at 200-300 degrees C and atmospheric pressure. Alumina supported catalysts yielded a lower initial activity compared with the silica supported catalysts and displayed a lower deactivation rate. The main route for deactivation of Cu-Zn/Al2O3 was coking while that of Cu-Zn/SiO2 was the crystallization of Cu degrees phase. ZnO was essentially an inactive component, promoted the activity of supported Cu catalysts by modifying the structure and electronic state of Cu metallic phase and selectivity of Cu/Al2O3 by modifying the surface of support. Oxidative regeneration of Cu-Zn/Al2O3 catalyst after 250 hours on stream recovered completely its initial activity. Kinetic experiments yielded a Langmuir-Hinshelwoodtype equation expressing the MOIP rate of dehydrogenation on Cu-Zn/Al2O3.
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页码：407 / 414
页数：8
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