Název: Stabilizace kovových nanočástic v zeolitu MWW pro katalytické aplikace
Překlad názvu: Stabilization of metal nanoparticles in MWW zeolite for catalytic applications
Autoři: Molitorisová, Sidónia ; Shamzhy, Mariya (vedoucí práce) ; Hronec, Mlan (oponent)
Typ dokumentu: Bakalářské práce
Rok: 2021
Jazyk: eng
Abstrakt: Controlling both size of metal nanoparticles (MNPs) and acidobasic characteristics of the zeolite support is highly desirable for preparation of stable and active bifunctional catalysts. 2D-3D transformation of layered zeolite precursor into three-dimensional zeolite coupled with metal encapsulation is one of the most efficient synthetic strategies so far to achieve the appropriate metal dispersion and aggregative stability of MNPs within zeolite matrix. Nevertheless, the effect of support acidic characteristics on the properties of thus prepared metal@zeolite catalyst remained unrevealed, while the synthetic strategy itself requires further optimization to minimize the loss of metal component. This work addresses the influence of chemical composition of zeolite layered precursor on physical-chemical and catalytic properties of metal@zeolite catalysts prepared via 2D-3D transformation strategy, taken Pd@MCM-222D-3D system as a representative example. Both Si/Al ratio of MCM-22P layered precursor (e.g., Si/Al = 15, 20, 30) and Pd loading (e.g., 0.1, 0.3, 0.8 wt.%) were varied resulting in a set of nine Pd@MCM-222D-3D catalysts. In addition, three Pd@MCM-22impreg catalysts with the same metal loading (0.1 wt.%), but different Si/Al ratios of a support were synthesized via conventional impregnation...
Klíčová slova: design materiálů; heterogenní katalyzátory; kovové nanočástice; zeolity; heterogeneous catalysts; material design; metal nanoparticles; zeolite

Instituce: Fakulty UK (VŠKP) (web)
Informace o dostupnosti dokumentu: Dostupné v digitálním repozitáři UK.
Původní záznam: http://hdl.handle.net/20.500.11956/128279

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-448713


Záznam je zařazen do těchto sbírek:
Školství > Veřejné vysoké školy > Univerzita Karlova > Fakulty UK (VŠKP)
Vysokoškolské kvalifikační práce > Bakalářské práce