Please use this identifier to cite or link to this item: https://scholarhub.balamand.edu.lb/handle/uob/1902
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dc.contributor.authorDahdah, Elianeen_US
dc.contributor.authorEstephane, Janeen_US
dc.contributor.authorGennequin, Cédricen_US
dc.contributor.authorAboukaïs, Antoineen_US
dc.contributor.authorAouad, Sameren_US
dc.contributor.authorAbi Aad, Edmonden_US
dc.date.accessioned2020-12-23T09:02:34Z-
dc.date.available2020-12-23T09:02:34Z-
dc.date.issued2020-
dc.identifier.urihttps://scholarhub.balamand.edu.lb/handle/uob/1902-
dc.description.abstractThe influence of lanthanum promotion on the physico-chemical properties and catalytic activity of Ni/Mg-Al catalysts in the glycerol steam reforming (GSR) reaction was studied. An Mg-Al and different Mg-Al-La supports with various molar ratios were synthesized using a co-precipitation technique. The calcined supports were then impregnated with 5 wt% Ni. After calcination at 600 °C, physico-chemical properties of the Ni-based catalysts were investigated by XRD, BET, H2-TPR, and CO2-TPD techniques. H2-TPR analyses showed that the quantity of lanthanum in the support composition influenced the reducibility of Ni species as well as their dispersion. CO2-TPD analyses showed that lanthanum addition improved catalyst basicity. The activity of all catalysts in the GSR reaction was tested (T = 400−700 °C, water/glycerol feed ratio 9:1, flow rate of 0.025 mL/min). The composition of the Ni/MAL0.4 (Ni/Mg6Al1.6La0.4; subscripted numbers indicate the molar ratio of each metal) catalyst provided a good metal-support interaction and Ni dispersion which translated to an overall superior performance in terms of hydrogen yields, glycerol conversion to gaseous products, and total glycerol conversions. TG-DSC analyses of the spent catalysts showed that the lanthanum quantity also influenced the quantity of coke deposition. The formation of encapsulating coke over all catalysts was linked to high concentrations of dehydration products observed in liquid product analysis. A stability test conducted at 600 °C for Ni/MAL0.4 revealed its deactivation due to encapsulating coke formation which resulted in active metal site blockage. With a reduced flow rate (0.008 mL/min), a different coke formation mechanism allowed the catalyst to last for 24 h.en_US
dc.format.extent11 p.en_US
dc.language.isoengen_US
dc.subjectLanthanumen_US
dc.subjectHydrotalciteen_US
dc.subjectGlycerolen_US
dc.subjectReformingen_US
dc.subject.lcshCatalystsen_US
dc.titleEffect of La promotion on Ni/Mg-Al hydrotalcite derived catalysts for glycerol steam reformingen_US
dc.typeJournal Articleen_US
dc.identifier.doi10.1016/j.jece.2020.104228-
dc.contributor.affiliationDepartment of Chemical Engineeringen_US
dc.contributor.affiliationDepartment of Chemistryen_US
dc.description.volume8en_US
dc.description.issue5en_US
dc.description.startpage1en_US
dc.description.endpage11en_US
dc.date.catalogued2020-11-03-
dc.description.statusPublisheden_US
dc.identifier.ezproxyURLhttp://ezsecureaccess.balamand.edu.lb/login?url=https://doi.org/10.1016/j.jece.2020.104228en_US
dc.identifier.OlibID272801-
dc.relation.ispartoftextJournal of Environmental Chemical Engineeringen_US
dc.provenance.recordsourceOliben_US
Appears in Collections:Department of Chemical Engineering
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