Journal
CATALYSIS COMMUNICATIONS
Volume 15, Issue 1, Pages 23-26Publisher
ELSEVIER
DOI: 10.1016/j.catcom.2011.08.003
Keywords
Co-precipitation; Ruthenium; Sm2O3-CeO2; Ammonia synthesis
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Funding
- PetroChina Innovation Foundation [2010D-5006-0502]
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A series of Ru/Sm2O3-CeO2 catalysts were prepared by using a co-precipitation (CP) method and characterized by XRD, BET, SEM, H-2-TPD-MS, H-2-TPR and CO chemisorption. The activity test shows that ammonia concentration of the catalyst with 7% Sm is 13.4% at 10 MPa, 10,000 h(-1), 425 degrees C, which is 21% higher than that of Ru/CeO2. Such high catalytic activity was due to three effects: the morphology changes of catalyst, electrodonating property of partially reduced CeO2-x to Ru metal and the property of easily hydrogen desorption derived from the presence of Sm3+ in ceria. (C) 2011 Elsevier B.V. All rights reserved.
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