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 2O2. Activity was tested at both atmospheric and high pressure, batch and semi-batch wise. Decomposition, hydrogenation and direct synthesis of H2O2 were assessed on the PdAu-ZS catalyst. Catalysts have been tested also in a trickle bed reactor for the continuous direct synthesis. The H2/Pd mol ratio was investigated to enhance both H2O2 concentration and selectivity in batch and TBR. H2O2 concentration was successfully compared between batch and TBR. The TBR shows an enhancement in selectivity towards H 2O2 compared to the batch synthesis. A H2O 2 selectivity of 90% was achieved with the TBR. © 2011, AIDIC Servizi S.r.l.
Hydrogen peroxide direct synthesis: From catalyst preparation to continuous reactors
CANU, PAOLO;
2011
Abstract
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 2O2. Activity was tested at both atmospheric and high pressure, batch and semi-batch wise. Decomposition, hydrogenation and direct synthesis of H2O2 were assessed on the PdAu-ZS catalyst. Catalysts have been tested also in a trickle bed reactor for the continuous direct synthesis. The H2/Pd mol ratio was investigated to enhance both H2O2 concentration and selectivity in batch and TBR. H2O2 concentration was successfully compared between batch and TBR. The TBR shows an enhancement in selectivity towards H 2O2 compared to the batch synthesis. A H2O 2 selectivity of 90% was achieved with the TBR. © 2011, AIDIC Servizi S.r.l.
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
