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

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Abstract

Dehydrogenation of methoxyisopropanol (MOIP) on reduced Cu-Zn catalysts was studied in a fixed bed reactor at 200-300°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° 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 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-Hinshelwood type equation expressing the MOIP rate of dehydrogenation on Cu-Zn/Al2O3

Original languageEnglish
Pages (from-to)407-414
Number of pages8
JournalStudies in Surface Science and Catalysis
Volume108
DOIs
StatePublished - 1 Jan 1997

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