The Role of A-Site Ion Nonstoichiometry in the Oxygen Absorption Properties of Sr1+xCo0.8Fe0.2O3 Oxides
文献类型：期刊论文
| 作者 | He, Yufeng1,2; Zhu, Xuefeng1; Yang, Weishen1 |
| 刊名 | aiche journal
 |
| 出版日期 | 2011 |
| 卷号 | 57期号:1页码:87-95 |
| 关键词 | absorbents oxygen separation absorption capacity desorption rate stability |
| 英文摘要 | sr1+xco0.8fe0.2o3 (0.2 <= x <= 0.1) oxides have been synthesized and investigated as potential oxygen absorbents for high temperature oxygen separation processes. it was found that the a-site ion deficient sr0.95co0.8fe0.2o3 and sr0.9co0.8fe0.2o3 oxides have larger oxygen absorption capacities, and slightly higher oxygen desorption rates. however, the a-site ion excess sr1.05co0.8fe0.2o3 and sr1.1co0.8fe0.2o3 exhibited much higher oxygen desorption rates, but smaller oxygen absorption capacities. the oxygen absorption capacities were further verified using oxygen temperature-programmed desorption technique, and the oxygen desorption rates were well described by a pseudo-second-order kinetics model. in addition, the long-term stability of sr0.9co0.8fe0.2o3 was investigated for 280 h (1120 loops) with switching between oxygen absorption and desorption. the excellent stability was confirmed by x-ray diffraction patterns which suggested that the cyclic processes of oxygen absorption and desorption took place between the perovskite structure with disordered oxygen vacancies and the brownmillerite structure with ordered oxygen vacancies. (c) 2010 american institute of chemical engineers aiche j, 57: 87-95, 2011 |
| WOS标题词 | science & technology ; technology |
| 类目[WOS] | engineering, chemical |
| 研究领域[WOS] | engineering |
| 关键词[WOS] | lanthanum cobaltite perovskite ; sorptive properties ; ceramic membranes ; air separation ; fuel-cells ; permeation ; performance ; capability ; kinetics ; equilibrium |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000285396300008 |
| 公开日期 | 2015-11-17 |
| 源URL | [http://159.226.238.44/handle/321008/142574]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | He, Yufeng,Zhu, Xuefeng,Yang, Weishen. The Role of A-Site Ion Nonstoichiometry in the Oxygen Absorption Properties of Sr1+xCo0.8Fe0.2O3 Oxides[J]. aiche journal,2011,57(1):87-95. |
| APA | He, Yufeng,Zhu, Xuefeng,&Yang, Weishen.(2011).The Role of A-Site Ion Nonstoichiometry in the Oxygen Absorption Properties of Sr1+xCo0.8Fe0.2O3 Oxides.aiche journal,57(1),87-95. |
| MLA | He, Yufeng,et al."The Role of A-Site Ion Nonstoichiometry in the Oxygen Absorption Properties of Sr1+xCo0.8Fe0.2O3 Oxides".aiche journal 57.1(2011):87-95. |
入库方式： OAI收割
来源：大连化学物理研究所
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