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Hierarchical Pore ZSM-5 Zeolite Structures: from Micro to Macro-Engineering of Structured Catalysts

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Tessonnier,  Jean-Philippe
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Louis, B., Okampo, F., Yun, H.-S., Tessonnier, J.-P., & Pereira, M. M. (2010). Hierarchical Pore ZSM-5 Zeolite Structures: from Micro to Macro-Engineering of Structured Catalysts. Chemical Engineering Journal, 161(3), 397-402. Retrieved from http://dx.doi.org/10.1016/j.cej.2009.09.041.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0010-F536-6
Abstract
Zeolite crystals coated on mesoporous glass materials with hierarchical tri-modal pore size distributions have been successfully prepared and characterized. Starting glass monoliths, having regular meso- and macro-pores, were partly re-constructed into zeolite material, thus introducing additional microporosity via the growth of these zeolite crystals. Hierarchical 3D porous glass scaffolds were prepared by a combination of sol–gel, double polymer templating, and rapid prototyping (RP) techniques. Structured zeolitic catalytic materials were produced by conventional self-assembly of template cations and silica species on the glass surface. Zeolite crystals are therefore in an intimate contact with the glass support, featuring micropores in addition to the mesopores. A higher catalytic performance and selectivity toward low alkenes were achieved in n-hexane cracking reaction over these zeolite/glass composites in comparison with purely microporous zeolite materials.