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Received February 10, 2003
Accepted April 4, 2003
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Characterization of a Nickel-Strontium Phosphate Catalyst for Partial Oxidation of Methane
Jin Hyuk Jun
Sang Jin Lee
Seung-Hwan Lee
Tae-Jin Lee1
Sang Jun Kong2
Tae Hoon Lim2
Suk-Woo Nam2
Seong-Ahn Hong2
Ki June Yoon†
Department of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Korea 1School of Chemical Engineering & Technology, Yeungnam University, Kyongsan 712-749, Korea 2Battery and Fuel Cell Research Center, Korea Institute of Science and Technology, Seoul 136-791, Korea
Korean Journal of Chemical Engineering, September 2003, 20(5), 829-834(6), 10.1007/BF02697283
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Abstract
A nickel-strontium phosphate catalyst was recently reported to exhibit high activity and selectivity in partial oxidation of methane (POM). Further characterizations have been performed in the present work in order to better understand the characteristics of this catalyst. TEM showed that very fine nickel particles of a few nanometers of the size were present in the needle shape in the sample after the reaction. TPR showed the presence of three nickel species, confirming that the nickel in the strontium hydroxyapatite and phosphate structures comes out as fine particles and is_x000D_
reduced during the reaction. As the calcination time during the preparation increased, the total re-oxidation temperature became higher. This is considered due to larger crystallite size owing to the longer calcination, which results in a smaller amount of nickel coming out of the matrix to the surface.
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References
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