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

Result code in 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>

Alternative codes found

RIV/00216275:25310/22:39919527

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10403 - Physical chemistry

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2022

Confidentiality

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

Name of the periodical

Applied Materials Today [online]

ISSN

2352-9407

e-ISSN

2352-9407

Volume of the periodical

29

Issue of the periodical within the volume

December

Country of publishing house

GB - UNITED KINGDOM

Number of pages

14

Pages from-to

101644

UT code for WoS article

000871099900001

EID of the result in the Scopus database

2-s2.0-85139280906