A highly active and stable Ru catalyst for syngas production via glycerol dry reforming: Unraveling the interplay between support material and the active sites
نویسندگان
چکیده
Glycerol dry reforming (GDR) was studied on Ru/La2O3, Ru/ZrO2, and Ru/La2O3–ZrO2 catalysts. Impacts of the support morphological, electronic surface chemical properties catalysts were comprehensively characterized by TEM, in–situ DRIFTS, XPS, ATR–IR XRD. Initial (5 h) CO2 conversion at 750 °C CO2–to–glycerol ratio 1–4 ordered as Ru/La2O3 < Ru/ZrO2 Ru/La2O3–ZrO2. During 72 h stability tests, deactivated ~33% due to Ru sintering, structural deformation monoclinic zirconia support, strong metal–support interaction. Under identical conditions, decreased 27% mainly dehydroxylation/carbonation lanthana severe coking. Lanthana–stabilized tetragonal phase led finely dispersed small oxidic clusters which 15% after demonstrated unusually high catalytic performance that par with significantly more expensive Rh–based catalysts, are known their exceptional activity in GDR.
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ژورنال
عنوان ژورنال: Applied Catalysis A-general
سال: 2022
ISSN: ['0926-860X', '1873-3875']
DOI: https://doi.org/10.1016/j.apcata.2022.118577