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AuthorAhmad, Yahia H.
AuthorMohamed, Assem T.
AuthorKumar, Anand
AuthorAl-Qaradawi, Siham Y.
Available date2022-09-15T07:07:58Z
Publication Date2021
Publication NameRSC Advances
ResourceScopus
URIhttp://dx.doi.org/10.1039/d1ra05511a
URIhttp://hdl.handle.net/10576/34045
AbstractThe production of syngas via dry reforming of methane (DRM) has drawn tremendous research interest, ascribed to its remarkable economic and environmental impacts. Herein, we report the synthesis of K, Na, Cs, Li, and Mg-promoted Ni/La2O3 using solution combustion synthesis (SCS). The properties of the catalysts were determined by N2 physisorption experiments, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectrometry (XPS), and H2-TPR (temperature programmed reduction). In addition, their catalytic performance towards DRM was evaluated at 700 °C. The results demonstrated that all catalysts exhibited porous structures with high specific surface area, in particular, Mg-promoted Ni/La2O3 (Mg–Ni–La2O3) which depicted the highest surface area and highest pore volume (54.2 m2 g−1, 0.36 cm3 g−1). Furthermore, Mg–Ni–La2O3 exhibited outstanding catalytic performance in terms of activity and chemical stability compared to its counterparts. For instance, at a gas hourly space velocity (GHSV) of 30 000 mL g−1 h−1, it afforded 83.2% methane conversion and 90.8% CO2 conversion at 700 °C with no detectable carbon deposition over an operating period of 100 h. The superb DRM catalytic performance of Mg–Ni–La2O3 was attributed to the high specific surface area/porosity, strong metal-support interaction (MSI), and enhanced basicity, in particular the strong basic sites compared to other promoted catalysts. These factors remarkably enhance the catalytic performance and foster resistance to coke deposition.
SponsorThis publication was supported by Qatar University, internal grant number QUCG-CENG-19/20-7. The ?ndings achieved herein are solely the responsibility of the authors. The authors also acknowledge the technical support of Central Laboratories Unit (CLU), Center for Advanced Materials (CAM), and Gas Processing Center (GPC), Qatar University, Doha, Qatar.
Languageen
PublisherRoyal Society of Chemistry
Subjectdry reforming of methane (DRM)
syngas
solution combustion synthesis (SCS)
scanning electron microscopy (SEM)
TitleSolution combustion synthesis of Ni/La2O3for dry reforming of methane: Tuning the basicity via alkali and alkaline earth metal oxide promoters
TypeArticle
Pagination33734-33743
Issue Number53
Volume Number11
dc.accessType Open Access


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