Improving the Stability of Ru-Doped Ni-Based Catalysts for Steam Methane Reforming during Daily Startup and Shutdown Operation

In this study, a Ru-doped Ni pellet-type catalyst was prepared to produce hydrogen via steam methane reforming (SMR). A small amount of Ru addition on the Ni catalyst improved Ni dispersion, thus affording a higher catalytic activity than that of the Ni catalyst. During the daily startup and shutdow...

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Bibliographic Details
Published inCatalysts Vol. 13; no. 6; p. 949
Main Authors Kim, Tae-Young, Lee, Jong-Heon, Jo, Seongbin, Kim, Jueon, Woo, Jin-Hyeok, Dhanusuraman, Ragupathy, Kim, Jae-Chang, Lee, Soo-Chool
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.06.2023
Subjects
Catalysts
Catalytic activity
Chemical reactions
daily startup and shutdown operation
Energy consumption
fuel cell
Hydrogen
Metals
Methane
Ni pellet-type catalyst
Nickel
Oxidation
Reforming
Ru promotion
Scanning electron microscopy
Shutdowns
Spectrum analysis
Stability
steam–methane reforming
Temperature
Transition metal compounds
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Summary:In this study, a Ru-doped Ni pellet-type catalyst was prepared to produce hydrogen via steam methane reforming (SMR). A small amount of Ru addition on the Ni catalyst improved Ni dispersion, thus affording a higher catalytic activity than that of the Ni catalyst. During the daily startup and shutdown (DSS) operations, the CH4 conversion of Ni catalysts significantly decreased because of Ni metal oxidation to NiAl2O4, which is not reduced completely at 700 °C. Conversely, the oxidized Ni species in the Ru–Ni catalyst can be reduced under SMR conditions because of H2 spillover from the surface of Ru onto the surface of Ni. Consequently, the addition of a small quantity of Ru to the Ni catalyst can improve the catalytic activity and stability during the DSS operation.
ISSN:2073-4344
2073-4344
DOI:10.3390/catal13060949