Diffusion-Driven Selectivity in Oxidation of CO in
the Presence of Propylene Using Zeolite Nano Shell as Membrane
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Abstract
The selective oxidation of CO over
C<sub>3</sub>H<sub>6</sub> is
achieved in yolk-shell Pt@Silicalite-1 catalysts in which Pt nanoparticles
are encapsulated in hollow silicalite-1 single crystals. The thin
shell operates as a permselective membrane which limits Pt surface
poisoning by C<sub>3</sub>H<sub>6</sub>. From adsorption measurements,
we conclude that the catalytic selectivity arises from the fastest
diffusion of CO over C<sub>3</sub>H<sub>6</sub> through the silicalite-1
membrane