Oxygen sorption and desorption properties of Sr–Co–Fe oxide
作者： Qinghua Yin , Jay Kniep , Y.S. Lin
DOI: 10.1016/J.CES.2008.01.016
关键词:
摘要: SrCoFeOx has been investigated as a new sorbent for air separation and oxygen removal at high temperatures. X-ray diffraction analysis of sample prepared by liquid citrate method reveals that the contains an intergrowth (Sr4Fe6−x Cox O13±), perovskite (SrFe1−x O3−), spinel (Co3−x Fex O4) phase. Both vacancies (V ¨ O ) interstitial ions (O �� i are involved in adsorption desorption process . Compared with perovskite-type oxide La0.1Sr0.9Co0.9Fe0.1O3−, stronger structure stability reducing environment it also exhibits larger sorption capacity temperatures higher than 800 ◦ C. Meanwhile, unlike La0.1Sr0.9Co0.9Fe0.1O3− which shows fast rate slow 900 C, same temperature. data samples sintered 1140 C have amount phase 950 due to formation kinetics. thermogravimetric solid state show synthesis strongly influences three phases sample. 2008 Elsevier Ltd. All rights reserved.
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