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Received January 27, 2010
Accepted June 10, 2010
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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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Oxygen removal from nitrogen using YBaCo(2)O(5+δ) adsorbent
1Department of Mathematical and Physical Sciences, Henan Institute of Engineering, Zhengzhou 451191, China 2Key Laboratory of Material Physics of Ministry of Education, Zhengzhou University, Zhengzhou 450052, China 3Department of Physics and Electronic Engineering, Zhoukou Normal University, Zhoukou 466001, China
hao@haue.edu.cn
Korean Journal of Chemical Engineering, February 2011, 28(2), 563-566(4), 10.1007/s11814-010-0354-9
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Abstract
The oxygen intake/release behavior of YBaCo(2)O(5+δ) and its application as a medium-temperature (100-600 ℃) adsorbent to oxygen removal in nitrogen purification was investigated. The oxygen content in YBaCo(2)O(5+δ) was varied between 5.46 and 5.0 with the change of the temperature and oxygen partial pressure. This oxygen nonstoichiometry showed good reversibility and the crystal structure of YBaCo(2)O(5+δ) remained stable in the oxygen intake/release process. Results of nitrogen purification experiment show that YBaCo(2)O(5+δ) material is a promising candidate to remove trace oxygen from nitrogen. After being deoxidized at 600 ℃ in nitrogen, 1 kg YBaCo(2)O(5+δ) adsorbent can purify 310 L nitrogen of 98.1% to high-purity nitrogen of over 99.9999% in one cycle.
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