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

Hend Omar Mohamed, Vijay K. Velisoju, Idoia Hita, Omar Abed, Rajesh K. Parsapur, Naydu Zambrano, Mohamed Ben Hassine, Natalia Morlanes, Abdul Hamid Emwas, Kuo Wei Huang, Pedro Castaño*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number146077
JournalChemical Engineering Journal
Volume475
DOIs
StatePublished - Nov 1 2023

Keywords

  • Ethylene oligomerization
  • Grafted Ni
  • Heterogeneous catalyst
  • Polymeric zeolite
  • Synthesis process

ASJC Scopus subject areas

  • General Chemistry
  • Environmental Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering

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