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Title: CO<inf>2</inf> methanation over LDH derived NiMgAl and NiMgAlFe oxides: Improving activity at lower temperatures via an ultrasound-assisted preparation
Authors: Obeid, Michel
Poupin, Christophe
Labaki, Madona
Aouad, Samer 
Delattre, François
Gupta, Sharad
Lucette Tidahy, Haingomalala
Younis, Aida
Ben Romdhane, Ferdaous
Gaigneaux, Eric M.
Schnee, Josefine
Abi-Aad, Edmond
Affiliations: Department of Chemistry 
Keywords: CO2 hydrogenation
Layered double hydroxide
Issue Date: 2023-10-15
Publisher: Elsevier
Part of: Chemical Engineering Journal
Volume: 474
Within the idea to catalyze CO2 methanation NiMgAl and NiMgAlFe oxides were synthesized by the layered double hydroxide route using co-precipitation and ultrasound-assisted co-precipitation. MgAl and MgAlFe oxides-supported Ni materials prepared by the impregnation method were used as references. Inductively-coupled plasma optical emission spectroscopy, X-ray diffraction, thermal decomposition, H2-temperature programmed reduction, N2 physisorption, and transmission electron microscopy were used to characterize the catalysts. NiMgAl prepared using ultrasound-assisted co-precipitation showed the best activity with no deactivation for 40 h under stream. This was attributed mainly to the lower particle size, the higher specific surface area and pore volume as well as the better dispersion of nickel active species at the surface of the concerned materials. In our case, the ultrasound method saves a lot of time during the synthesis process since the maturation phase lasts only 30 min instead of 18 h required for the traditional co-precipitation.
ISSN: 13858947
DOI: 10.1016/j.cej.2023.145460
Ezproxy URL: Link to full text
Type: Journal Article
Appears in Collections:Department of Chemistry

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