Ionic Liquids have been shown to have great advantages in various kinds of catalytic reactions as well as in preparation of nanostructured materials and nanoparticles for catalysis. Supported ionic liquids with metal particles combine the advantages of homogeneous and heterogeneous catalysis into one system.. Based on this concept, SiO2 supported ionic liquid with Pd metal particles are investigated for the selective hydrogenation of acetylene in this study. The results indicate that silica supported Pd catalysts loading with ionic liquids are effective systems for selective hydrogenation of acetylene in ethylene. Reaction with higher H2/C2H2 ratio favors higher acetylene conversion but lower ethylene selectivity. The results also suggest that the catalysts with [BF4] anion usually achieve higher conversion but lower selectivity, and those catalysts with [PF6] anion lower conversion but higher selectivity. The temperature at maximum yield shifts to lower temperatures when [BF4] anion was used. Three catalysts, including Pd/BmimPF6/SiO2, Pd/EmimPF6/SiO2, and Pd/EmimTf2N/SiO2, are stable under the conditions tested. Especially, Pd/EmimPF6/SiO2 achieves a stability yield of ~70% for 12 hours at 104�C.

SiO<sub>2</sub> supported ionic liquids with Pd for selective hydrogenation of acetylene in ethylene

245th National Meeting (2013)

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SiO2 supported ionic liquids with Pd for selective hydrogenation of acetylene in ethylene

SiO₂ supported ionic liquids with Pd for selective hydrogenation of acetylene in ethylene