Brownmillerite (BM)-type oxide sorbents have gained attention recently for producing oxygen-enriched streams. Herein, a cost-effective method of quenching with the use of an Al foil pad is adapted for the synthesis of brownmillerite SrCoO_2.5. The oxygen storage capacity of this oxide has been investigated using a simple home-built volumetric setup. The oxygen-rich phase was formed by a pressurized heat-treatment of a BM sample. The oxygen storage capacity of the sample has been calculated from the pressure change during desorption. The effect of oxygen pressure on the amount of oxygen stored inside the sample has also been evaluated. Furthermore, selective absorption of oxygen is confirmed by performing the absorption in compressed air. The results indicate that 15.28 cm³ O₂ g^–1 can be stored in the sample at STP. The change in oxygen content in SrCoO_2.5+δ varied reversibly up to a δ value of 0.26, which is confirmed by iodometric titration. It is shown that the new method of quenching proposed does not deteriorate the oxygen storage property of the material.

中文翻译：

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成本有效的淬灭方法，用于除氧应用，可稳定褐铁矿型SrCoO _2.5

褐煤（BM）型氧化物吸附剂最近已引起人们的关注，用于生产富氧流。在本文中，使用铝箔垫淬灭的经济有效的方法适合于合成褐煤SrCoO _2.5。该氧化物的储氧能力已使用简单的自制体积设置进行了研究。富氧相是通过对BM样品进行加压热处理而形成的。由解吸过程中的压力变化计算出样品的储氧能力。还评估了氧气压力对样品内部存储的氧气量的影响。此外，通过在压缩空气中进行吸收来确认氧的选择性吸收。结果表明15.28 cm ³ OSTP样品中可以存储₂ g ^–1。SrCoO _{2.5 +δ}中的氧含量变化可逆地变化，直到δ值为0.26，这已通过碘量滴定法得到了证实。结果表明，提出的新的淬火方法不会降低材料的储氧性能。