Abstract
Ruthenium/activated charcoal (Ru-C) was modified by a solid-solid interaction method with synthe- sized nano-zinc oxide (n-ZnO). Three different ratios of Ru-C:n-ZnO (1:2, 1:1 and 3:2) were used to prepare Ru- C-ZnO composite catalysts. These were used in the gas- phase, one-step self-condensation of acetone to methyl isobutyl ketone (MIBK). The composite catalyst (1:1 ratio) contained 2.5 wt% Ru showed superior conversion of acetone and selectivity for MIBK. Furthermore, this cata- lyst showed good consistency for MIBK formation for 100 h without any deactivation. Characterization of the catalysts revealed that balanced hydrogenation and acid- base functional character is crucial to obtain high catalytic performance.
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