Hydrogen peroxide direct synthesis: From catalyst preparation to continuous reactors (original) (raw)
Bimetallic Pd-Au catalysts supported on sulphated zirconia (ZS) were prepared by different methods and used for hydrogen peroxide direct. The effect of the addition of gold to Pd enhance the selectivity and the yield of H 2 O 2 . Activity was tested at both atmospheric and high pressure, batch and semi-batch wise. Decomposition, hydrogenation and direct synthesis of H 2 O 2 were assessed on the PdAu-ZS catalyst. Catalysts have been tested also in a trickle bed reactor for the continuous direct synthesis. The H 2 /Pd mol ratio was investigated to enhance both H 2 O 2 concentration and selectivity in batch and TBR. H 2 O 2 concentration was successfully compared between batch and TBR. The TBR shows an enhancement in selectivity towards H 2 O 2 compared to the batch synthesis. A H 2 O 2 selectivity of 90% was achieved with the TBR.
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