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      A highly active and stable Ru catalyst for syngas production via glycerol dry reforming: Unraveling the interplay between support material and the active sites

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      Author(s)
      Ozden, M.
      Say, Zafer
      Kocak, Yusuf
      Ercan, Kerem Emre
      Jalal, Ahsan
      Ozensoy, Emrah
      Avci, A. K.
      Date
      2022-04-25
      Source Title
      Applied Catalysis A: General
      Print ISSN
      0926-860X
      Electronic ISSN
      1873-3875
      Publisher
      Elsevier
      Volume
      636
      Language
      English
      Type
      Article
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      Abstract
      Glycerol dry reforming (GDR) was studied on Ru/La2O3, Ru/ZrO2, and Ru/La2O3–ZrO2 catalysts. Impacts of the support on morphological, electronic and surface chemical properties of the catalysts were comprehensively characterized by TEM, in–situ DRIFTS, XPS, ATR–IR and XRD. Initial (5 h) CO2 conversion at 750 °C and CO2–to–glycerol ratio of 1–4 was ordered as Ru/La2O3 < Ru/ZrO2 < Ru/La2O3–ZrO2. During 72 h stability tests, Ru/ZrO2 deactivated by ~33% due to Ru sintering, structural deformation of the monoclinic zirconia support, and strong metal–support interaction. Under identical conditions, CO2 conversion on Ru/La2O3 decreased by 27% mainly due to dehydroxylation/carbonation of lanthana and severe coking. Lanthana–stabilized tetragonal zirconia phase of Ru/La2O3–ZrO2 led to finely dispersed small oxidic Ru clusters which deactivated by 15% after 72 h and demonstrated unusually high catalytic performance that was on par with the significantly more expensive Rh–based catalysts, which are known with their exceptional activity and stability in GDR.
      Keywords
      Carbon dioxide
      Dry reforming
      Glycerol
      Ruthenium
      Synthesis gas
      Permalink
      http://hdl.handle.net/11693/111262
      Published Version (Please cite this version)
      https://doi.org/10.1016/j.apcata.2022.118577
      Collections
      • Department of Chemistry 707
      • Institute of Materials Science and Nanotechnology (UNAM) 2258
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