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http://dx.doi.org/10.12925/jkocs.2010.27.1.5

Effects of La addition to Ni/$CeO_2$ Methane Partial Oxidation Catalysts  

Cheon, Han-Jin (Department of Chemical Engineering, Myongji University)
Shin, Ki-Seok (Department of Chemical Engineering, Myongji University)
Ahn, Sung-Hwan (Department of Chemical Engineering, Myongji University)
Yoon, Cheol-Hun (Department of Chemical Engineering, Myongji University)
Hahm, Hyun-Sik (Department of Chemical Engineering, Myongji University)
Publication Information
Journal of the Korean Applied Science and Technology / v.27, no.1, 2010 , pp. 29-36 More about this Journal
Abstract
The effects of La addition to Ni/$CeO_2$ methane partial oxidation catalysts were investigated. Catalysts were prepared by the impregnation and urea methods. In the preparation of catalysts, La content was changed from 1 wt% to 3wt%. Catalysts that contain 2wt% La showed the highest methane conversion of about 80% and CO selectivity of 84% and $H_2$ selectivity of 70%. This result may be stemmed from that, when La content is 2wt%, a fluorite oxide-type structure is well formed and carbon deposition is also decreased. Among the catalysts, 2.5wt% Ni/Ce(La)Ox showed the highest catalytic activity. From the experiment of changing reaction temperature with 2.5wt% Ni/Ce(La)Ox catalyst, it was found that the optimum reaction temperature is $750^{\circ}C$ and at this temperature methane conversion was about 90%, CO and $H_2$ selectivities were 94 and 80%, respectively.
Keywords
Partial oxidation of methane; Synthesis gas; Carbon deposition; La addition;
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