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AuthorTageldin, Areej
AuthorIsmail, Rim
AuthorSardar, Ali
AuthorSaad, Mohamed Ali H.
AuthorBenamor, Abdelbaki
Available date2024-03-18T06:24:35Z
Publication Date2023
Publication NameChemical Engineering Research and Design
ResourceScopus
ISSN2638762
URIhttp://dx.doi.org/10.1016/j.cherd.2023.07.025
URIhttp://hdl.handle.net/10576/53135
AbstractWe report on the synthesis and evaluation of novel, highly active and stable bimetallic DFMs for simultaneous CO2 adsorption and subsequent hydrogenation to value added products. The DFMs contain various combinations of Ni (5–15 wt%) and Cu (5–15 wt%) with Na2O (5–15 wt%) as adsorbent supported on alumina (γ-Al2O3). The DFMs were synthesized via sequential incipient wetness impregnation method and were thoroughly characterized by combination of various surface sensitive and bulk sensitive analytical tools such as XRD, XPS, BET surface area, HR-TEM and H2-TPR. The DFMs were evaluated for CO2 capture and subsequent hydrogenation in a fixed-bed quartz tubular reactor connected with an online gas analyzer. The results demonstrated that at an operating temperature of 320 ℃ , the DFM with a composition of 10 wt%Ni5wt%Cu/10 wt%Na2O.Al2O3 resulted in exceptionally high CO2 adsorption (310.84 mol/g) and subsequent hydrogenation to methane (249.2 mol CH4/gDFM). The XPS analysis revealed that this DFM contains comparatively larger percentage of highly ionized and/or induced Ni2+ as well as Cu+1 species. The results of H2-TPR also clearly indicated improvement in its reducibility. Moreover, the TEM analysis results revealed the presence of well-dispersed and smaller metal oxide particles in the bimetallic 10 wt%Ni5wt%Cu/10 wt%Na2O.Al2O3 DFM. In this regards, the exceptional high performance of the 10 wt%Ni5wt%Cu/10 wt%Na2O.Al2O3 DFM was attributed to the synergistic effects of the bimetallic combination of Ni with Cu resulting in enhanced physicochemical properties and thus demonstrated exceptionally higher performance.
SponsorThe author "Areej Tageldin" would like to express her special thanks and gratitude to Qatar University for the financial support through the graduate assistant position.
Languageen
PublisherInstitution of Chemical Engineers
SubjectBimetallic DFMs
CO2 adsorption and conversion
Synergistic effects
TitleSynthesis and evaluation of novel and efficient Ni-based dual functional materials (DFMs) for integrated CO2 capture and hydrogenation
TypeArticle
Pagination628-642
Volume Number197
dc.accessType Abstract Only


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