T. Komatsu, Kaori Takagi, K. Ozawa
Apr 30, 2011
Citations
0
Influential Citations
13
Citations
Journal
Catalysis Today
Abstract
Abstract Trans -stilbene ( trans -ST) was produced through the hydrogenation of diphenylacetylene (DPA). Pd-based intermetallic compounds (IMCs) supported on silica were applied to the selective hydrogenation of DPA into cis - and trans -ST. Pd 3 Bi/SiO 2 showed the highest selectivity to stilbenes without accelerating the deep hydrogenation into diphenylethane (DPE), after DPA was completely converted. Proton-type zeolites were examined for the isomerization of cis -ST, the main product in the hydrogenation of DPA, into trans -ST. H-USY zeolite partially exchanged with Na + ions gave the highest activity owing to the appropriate acid strength and enough space inside the pores for cis -ST to enter. The mixture of Pd 3 Bi/SiO 2 and H-USY gave trans -ST yield of 74 mol% through the one-pot reaction of DPA. The isomerization rate was significantly retarded by coexisting DPA and DPE molecules.