Ethylene oligomerization on nickel catalysts on a solid acid support: From New mechanistic insights to tunable bifunctionality

[Display omitted] •Addresses gaps in review literature by proposing a comprehensive mechanistic view for heterogenous nickel-acid catalysts.•Highlights relevant conditions to steer product distributions of ethylene oligomerization towards desirable products.•Focuses on environmentally-friendly and f...

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Vydané v:Applied catalysis. A, General Ročník 624; s. 118296
Hlavní autori: Koninckx, Elsa, Mendes, Pedro S.F., Thybaut, Joris W., Broadbelt, Linda J.
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Amsterdam Elsevier B.V 25.08.2021
Elsevier Science SA
Predmet:
Acids
Alkenes
Alkylation
Bifunctional
Butenes
Catalysis
Catalysts
Chemical reactions
Ethylene
Ethylene oligomerization
First principles
Isomerization
Nickel
Oligomerization
Selectivity
Zeolite
DRIFTS
XANES
EPR
H
XAS
EXAFS
ASA
DRUV
DFT
FTIR
SEMK
XPS
Ni
Catalysis
XAFS
MOF
DAE
IR
TOF
Zeolite
wt.
Bifunctional
Ethylene oligomerization
Nickel
LAO
PCP
ISSN:0926-860X, 1873-3875
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Shrnutí:[Display omitted] •Addresses gaps in review literature by proposing a comprehensive mechanistic view for heterogenous nickel-acid catalysts.•Highlights relevant conditions to steer product distributions of ethylene oligomerization towards desirable products.•Focuses on environmentally-friendly and flexlble catalysts to produce a range of products for ever-changing market demands. Light alkene oligomerization on heterogeneous acidic catalysts is widely and successfully used in current commercial processes. However, ethylene oligomerization remains inefficient due to ethylene’s inability to form reaction intermediates to a sufficient extent on acid sites. Adding Ni(II) on solid acids can more efficiently catalyze ethylene oligomerization and selectively produce butenes to fuel range products. The review proposes a complete and detailed mechanism of heterogenous Ni-catalyzed oligomerization, whose structures are supported by combining various studies throughout recent literature, and focuses on the bifunctional effects of the nickel and acid sites on ethylene oligomerization. Using experiments, first-principles calculations, and kinetic modeling, Ni2+ has been shown to selectively oligomerize ethylene to light, linear alkenes via the Cossee-Arlman mechanism, while Brønsted H+ sites catalyze further alkylation, cracking, and isomerization reactions. The effects of reaction conditions and catalyst properties on selectivity and activity for oligomerization are systematically discussed. Tuning the relative nickel-to-acid site ratio and the framework support can allow for an optimal catalyst design directed towards desirable products.
Bibliografia:ObjectType-Article-1
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content type line 14
ISSN:0926-860X
1873-3875
DOI:10.1016/j.apcata.2021.118296