Highly productive framework bounded Ni2+ on hierarchical zeolite for ethylene oligomerization

[Display omitted] •Nickel supported on hierarchical zeolite synthesized using different methods.•The Ni-zeolite active sites were investigated in detail using different methods.•Cationic Ni sites grafted on the zeolite achieved high productivity of 1-butene.•Ni zeolite showed stability activity for...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2023-11, Vol.475, p.146077, Article 146077
Hauptverfasser: Mohamed, Hend Omar, Velisoju, Vijay K., Hita, Idoia, Abed, Omar, Parsapur, Rajesh K., Zambrano, Naydu, Hassine, Mohamed Ben, Morlanes, Natalia, Emwas, Abdul-Hamid, Huang, Kuo-Wei, Castaño, Pedro
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:[Display omitted] •Nickel supported on hierarchical zeolite synthesized using different methods.•The Ni-zeolite active sites were investigated in detail using different methods.•Cationic Ni sites grafted on the zeolite achieved high productivity of 1-butene.•Ni zeolite showed stability activity for 48h in the gas phase, flow reactor. The production of higher linear olefins via ethylene oligomerization is an applied industrial process using homogeneous catalysts in the liquid phase. Heterogeneous catalysts based on Ni supported on zeolites are attractive materials for gas phase oligomerization but typically offer a low selectivity or low conversion. Here, we investigate a tailored method to introduce the Ni2+ species within the hierarchical zeolite crystallization step (in situ) and compare it with the standard impregnation procedure (ex situ). The in situ engineered catalyst has a very high concentration of Ni2+ species, seamlessly inserted and well dispersed into the zeolite framework, with increased accessibility through meso- and micropores. This catalyst has a unique 1-butene cumulative productivity (32.7 g of 1-butene per g of catalyst) and stability for at least 48 h. This framework bounded Ni2+ promotes oligomerization over isomerization, cracking, and hydride transfer, while the hierarchical zeolite structure enables the discharge of coke precursors. These results pave the way for a more efficient and effective ethylene oligomerization process.
ISSN:1385-8947
1873-3212
DOI:10.1016/j.cej.2023.146077