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Catalytic Hydrogen Production via Dry Reforming of Methane Over Ni/Ce0.65Hf0.25M0.1O2-delta (M = Tb, Sm, Nd, Pr and La)

Authors
Harshini, D.Lee, Dae HyungKim, YongminNam, Suk WooHan, Jong HeeHam, Hyung ChulYoon, Chang Won
Issue Date
4월-2014
Publisher
SPRINGER
Keywords
Methane dry reforming; Carbon dioxide; Ceria-hafnia; Rare-earth elements; Oxygen storage capacity; Heterogeneous catalyst
Citation
CATALYSIS LETTERS, v.144, no.4, pp.656 - 662
Indexed
SCIE
SCOPUS
Journal Title
CATALYSIS LETTERS
Volume
144
Number
4
Start Page
656
End Page
662
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/98869
DOI
10.1007/s10562-014-1192-x
ISSN
1011-372X
Abstract
Ni/Ce0.65Hf0.25M0.1O2-delta (Ni/CH-M, M = Tb, Sm, Nd, Pr, and La), Ni-based catalysts supported on CeO2-HfO2 materials incorporated with rare earth elements, were prepared by a solvothermal method. The resulting catalysts were found to have surface areas ranging from 41 to 47 m(2)/g, and they proved to possess strong metal-to-support interactions, as evidenced by temperature programmed reduction analyses. Upon utilization of these catalysts for dry reforming of methane (DRM) with a CH4/CO2 ratio of 1 at a range of 600 to 900 degrees C, the Ni/CH-M catalysts were found to have higher activities than the Ni/CH catalyst. In addition, the activities proved to increase in the order of Ni/CH-Pr>Ni/CH-La similar to Ni/CH-Tb>Ni/ CH-Nd similar to Ni/CH-Sm>Ni/CH. With a high CH4/CO2 ratio of 2, these Ni/CH-M materials showed better stabilities than the Ni/CH catalyst in the DRM reaction at 800 degrees C for 150 h. Moreover, the Ni/CH-M (M = Pr, Tb, and La) catalysts exhibited superior durability over other Ni materials. Consistent with the observations, transmission electron microscopy further confirmed that no carbon species were observed in the Ni/CH-M (M = Pr, Tb, and La) catalysts following the reforming reactions.
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