Direct dehydrogenation of propane over Pd nanoparticles encapsulated within IPC zeolites with tunable pore sizes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F22%3A10453671" target="_blank" >RIV/00216208:11310/22:10453671 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216275:25310/22:39919527

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=e5eAr0bN8B" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=e5eAr0bN8B</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apmt.2022.101644" target="_blank" >10.1016/j.apmt.2022.101644</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Direct dehydrogenation of propane over Pd nanoparticles encapsulated within IPC zeolites with tunable pore sizes

Popis výsledku v původním jazyce

Propane dehydrogenation (PDH) yields propene, a valuable feedstock in increasing global demand. Yet, despite recent advances in supported metal nanoparticles (NPs) for such catalytic applications, preventing nanoparticle agglomeration remains a challenge. In this study, we prepared well-dispersed Pd nanoparticles and encapsulated them within IPC-2 and IPC-4 zeolites using the Assembly, Disassembly, Organization, and Reassembly (ADOR) process based on the 3D-2D-3D transformation. By structural and textural analysis, we confirmed the synthesis of two &apos;ADORable&apos; zeolites incorporated with Pd nanoparticles, namely Pd@IPC-2 and Pd@IPC-4. In the direct dehydrogenation of propane, Pd NPs encapsulated within IPC-2 and IPC-4 zeolites outperformed their impreg-nated counterparts (Pd/IPC-2 and Pd/IPC-4), with Pd@IPC-2 showing a higher catalytic activity than Pd@IPC-4. Accordingly, in addition to the number of surface Pd atoms, the size of the zeolite channels and the structure of the framework strongly affect the catalytic activity of encapsulated Pd. Moreover, confining Pd NPs inside zeolite channels prevented their sintering and agglomeration during the reaction as Pd NPs in impregnated catalysts expanded during the reaction. However, the structure of the zeolite encapsulated with Pd catalysts partly collapsed due to the harsh conditions of the dehydrogenation reaction, hindering access to Pd NPs, as observed in IR spectra. Therefore, palladium NPs are stable within zeolites and do not sinter, but their catalytic activity gradually decreases with the formation of carbon deposits. Although these deposites are removable by calci-nation, reactivation does not completely restore the original activity due to framework disruption and limited access to the active species.

Název v anglickém jazyce

Direct dehydrogenation of propane over Pd nanoparticles encapsulated within IPC zeolites with tunable pore sizes

Popis výsledku anglicky

Propane dehydrogenation (PDH) yields propene, a valuable feedstock in increasing global demand. Yet, despite recent advances in supported metal nanoparticles (NPs) for such catalytic applications, preventing nanoparticle agglomeration remains a challenge. In this study, we prepared well-dispersed Pd nanoparticles and encapsulated them within IPC-2 and IPC-4 zeolites using the Assembly, Disassembly, Organization, and Reassembly (ADOR) process based on the 3D-2D-3D transformation. By structural and textural analysis, we confirmed the synthesis of two &apos;ADORable&apos; zeolites incorporated with Pd nanoparticles, namely Pd@IPC-2 and Pd@IPC-4. In the direct dehydrogenation of propane, Pd NPs encapsulated within IPC-2 and IPC-4 zeolites outperformed their impreg-nated counterparts (Pd/IPC-2 and Pd/IPC-4), with Pd@IPC-2 showing a higher catalytic activity than Pd@IPC-4. Accordingly, in addition to the number of surface Pd atoms, the size of the zeolite channels and the structure of the framework strongly affect the catalytic activity of encapsulated Pd. Moreover, confining Pd NPs inside zeolite channels prevented their sintering and agglomeration during the reaction as Pd NPs in impregnated catalysts expanded during the reaction. However, the structure of the zeolite encapsulated with Pd catalysts partly collapsed due to the harsh conditions of the dehydrogenation reaction, hindering access to Pd NPs, as observed in IR spectra. Therefore, palladium NPs are stable within zeolites and do not sinter, but their catalytic activity gradually decreases with the formation of carbon deposits. Although these deposites are removable by calci-nation, reactivation does not completely restore the original activity due to framework disruption and limited access to the active species.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Applied Materials Today [online]

ISSN

2352-9407

e-ISSN

2352-9407

Svazek periodika

29

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

14

Strana od-do

101644

Kód UT WoS článku

000871099900001

EID výsledku v databázi Scopus

2-s2.0-85139280906