Abstract: New results on the preparation of palladium fiberglass catalysts, their characterization by means of XPS, STEM and HS-LEIS, as well as kinetic and mechanistic data on selective hydrogenation of acetylene followed from SSITKA are presented. The effective ways of confining 1 nm Pd clusters in the subsurface layers of glass and increasing their concentration were developed. Namely, these small clusters were shown to be responsible for high catalyst performance. The SSITKA study using 13C labeled acetylene clearly demonstrated that gas-phase ethylene was not involved in the reaction even at its very high excess. This fact was explained by the ability of glass to absorb predominantly such readily polarizable molecules like acetylene, but not ethylene. As a result, at a complete acetylene conversion our single-component Pd/FG catalyst demonstrates high selectivity (the ethylene increment of 60 %), which is higher than that of commercial bimetallic one.

Cite: Gulyaeva Y.K. , Kaichev V.V. , Zaikovskii V.I. , Suknev A.P. , Brongersma H. , Bal'zhinimaev B.S.
Selective Hydrogenation Processes over Novel Fiberglass Based Catalysts
EuropaCat-XII: 12th European Congress on Catalysis “Catalysis: Balancing the use of fossil and renewable resources” 30 Aug - 4 Sep 2015