Cu+, Ag+ and Na+ Cationic Sites in ZSM-5 Interacting with Benzene: DFT Modeling

• Autorzy: Załucka, J. , Kozyra, P. , Mitoraj, M. , Brocławik, E. , Datka, J.
• Języki publikacji: EN

Abstrakty

EN

Synthesis and characterization of new multimodal porous systems containing thin MFI zeolitic films is reported. These films cover the internal surface of the meso- and macroporous silica-alumina monoliths. They are easily accessible through the open porous structure retained in the partially recrystallized, originally amorphous monolith. When the mesoporous Al-SBA-15 sieves are used in stead of monoliths, a controlled hydrothermal process results in the formation of the MFI nanodomains dispersed in the walls that separate mesopores hexagonally arranged. These do mains possess strong acidic sites of the zeolitic type, but the original ordering of mesopores in the parent material is very well retained. A simple method for the synthesis of the MFI crystals containing both meso- and macrovoids is also proposed. It makes use of the suspended mono- and polydispersed carbon particles that serve as porogens. Thus, the porous MFI crystals obtained can be used for the preparation of effective bifunctional catalysts by the de position of a highly dispersed metallic (Pd) phase.

Słowa kluczowe

EN

Cu(I) sites; benzene activation; DFT modeling

• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2008
• Tom: Vol. 82, nr 9
• Strony: 1801-1808
• Opis fizyczny: Bibliogr. 21 poz., rys.

Twórcy

autor

Załucka, J.

autor

Kozyra, P.

autor

Mitoraj, M.

autor

Brocławik, E.

autor

Datka, J.

• Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Kraków, Poland,

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