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    Elucidating the Promotional Effect of Cerium in the Dry Reforming of Methane

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    Name:
    Elucidating_cctc.202001527.pdf
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    1.791Mb
    Format:
    PDF
    Description:
    Accepted manuscript
    Embargo End Date:
    2021-10-29
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    Type
    Article
    Authors
    Rodriguez Gomez, Alberto
    Lopez-Martin, Angeles
    Ramirez, Adrian
    Gascon, Jorge cc
    Caballero, Alfonso
    KAUST Department
    Chemical Engineering Program
    KAUST Catalysis Center (KCC)
    King Abdullah University of Science and Technology KAUST Catalysis Center SAUDI ARABIA
    Physical Science and Engineering (PSE) Division
    Date
    2020-11-19
    Embargo End Date
    2021-10-29
    Submitted Date
    2020-09-20
    Permanent link to this record
    http://hdl.handle.net/10754/665830
    
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    Abstract
    A series of Ni-Ce catalysts supported on SBA-15 has been prepared by co-impregnation, extensively characterized and evaluated in the carbon dioxide reforming of methane (DRM). The characterization by TEM, XRD and TPR has allowed us to determine the effect of metal loading on metal dispersion. Cerium was found to improve nickel location inside the mesopores of SBA-15 and to suppress coke formation during the DRM reaction. The analysis by XPS allowed us to associate the high cerium dispersion with the presence of low-coordinated Ce 3+ sites, being main responsible for its promotional effect. A combination of XAS and XPS has permitted us to determine the physicochemical properties of metals under reduction conditions. The low nickel coordination number determined by XAS in Ni-Ce doped systems after reduction suggests the generation of very small nickel particles which showed greater catalytic activity and stability in the reaction, and a remarkable resistance to coke formation.
    Citation
    Rodriguez Gomez, A., Lopez-Martin, A., Ramirez, A., Gascon, J., & Caballero, A. (2020). Elucidating the Promotional Effect of Cerium in the Dry Reforming of Methane. ChemCatChem. doi:10.1002/cctc.202001527
    Publisher
    Wiley
    Journal
    ChemCatChem
    DOI
    10.1002/cctc.202001527
    10.1002/cctc.202001958
    Additional Links
    https://onlinelibrary.wiley.com/doi/10.1002/cctc.202001527
    ae974a485f413a2113503eed53cd6c53
    10.1002/cctc.202001527
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Chemical Engineering Program; KAUST Catalysis Center (KCC)

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