Synthesis of hollow Y zeolite for catalytic applications

Abstract

SSCI-VIDE+ING+CPG:ATU:DFAInternational audienceHighly crystalline hollow Y zeolite capsules have been obtained for the first time. Starting from clas-sical NaY, the three-step process involves the formation of an artificial composition gradient within the crystals followed by a selective dissolution of crystal cores. Hollow Y zeolite crystals contain a single large internal cavity, a wall thickness of about 0.15 μm and an overall size similar to that of the starting materials. The well-defined Y zeolite capsules provide an alternative design to hierar-chical and nanosized zeolites for adsorption and catalysis. They shall offer fastest transport compared to the bulk due to the thin walls. Moreover, the effect of hollow structures on mass transport by transient adsorption methods (TAP measurements) and catalytic tests (hydrogenation of alkenes) will be reported in the basis of Thiele modulus and effectiveness factor studies