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A Comparative Study of Ni-Based Catalysts Prepared by Various Sol–Gel Routes

Authors :
Atheer Al Khudhair
Karim Bouchmella
Radu Dorin Andrei
Vasile Hulea
Ahmad Mehdi
Source :
Molecules, Vol 29, Iss 17, p 4172 (2024)
Publication Year :
2024
Publisher :
MDPI AG, 2024.

Abstract

The use of heterogeneous catalysts to increase the development of green chemistry is a rapidly growing area of research to save industry money. In this paper, mesoporous SiO2-Al2O3 mixed oxide supports with various Si/Al ratios were prepared using two different sol–gel routes: hydrolytic sol–gel (HSG) and non-hydrolytic sol–gel (NHSG). The HSG route was investigated in both acidic and basic media, while the NHSG was explored in the presence of ethanol and diisopropyl ether as oxygen donors. The resulting SiO2-Al2O3 mixed oxide supports were characterized using EDX, N2 physisorption, powder XRD, 29Si, 27Al MAS-NMR and NH3-TPD. The mesoporous SiO2-Al2O3 supports prepared by NHSG seemed to be more regularly distributed and also more acidic. Consequently, a simple one-step NHSG (ether and alcohol routes) was selected to prepare mesoporous and acidic SiO2-Al2O3-NiO mixed oxide catalysts, which were then evaluated in ethylene oligomerization. The samples prepared by the NHSG ether route showed better activity than those prepared by the NHSG alcohol route in the oligomerization of ethylene at 150 °C.

Details

Language :
English
ISSN :
14203049
Volume :
29
Issue :
17
Database :
Directory of Open Access Journals
Journal :
Molecules
Publication Type :
Academic Journal
Accession number :
edsdoj.34c2b5eb9f2f405e9b0c8fc20c7f39d7
Document Type :
article
Full Text :
https://doi.org/10.3390/molecules29174172