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SrCoxFe1–xO3−δ Oxygen Sorbent Usable for High-Temperature Pressure-Swing Adsorption Process Operating at Approximately 300 °C

“…Subsequent studies on the oxygen separation using SrCo x Fe 1– x O 3−δ have been focused on improvement in oxygen permeation property or stability of SrCo x Fe 1– x O 3−δ , by substituting an A-site or B-site cation with other metal ions. − On the other hand, for application of an oxygen sorbent for the HT-PSA process, Lin et al have first proposed that the perovskite-type oxides such as La y Sr 1– y Co x Fe 1– x O 3−δ can be used as an oxygen sorbent for the HT-PSA process. , The perovskite-type oxide can sorb and desorb oxygen largely and reversibly by changing ambient partial pressure of oxygen, resulting in separation of oxygen from air. The subsequent studies on the oxygen sorption/desorption properties demonstrated that the Co–Fe-based perovskite-type oxides usually gave relatively good behavior. ,,,− In addition, fundamental research involving the oxygen nonstoichiometry for SrCo x Fe 1– x O 3−δ , influencing both oxygen membrane-permeation property and oxygen PSA sorption/desorption properties, has been conducted over the past decades. − Although SrCo x Fe 1– x O 3−δ species have often been examined in the oxygen-permeation membrane tests, an oxygen separation test from air using the HT-PSA apparatus loaded with SrCo x Fe 1– x O 3−δ sorbent is limited to our preliminary research report . Thus, in this study, we aim to evaluate oxygen sorption/desorption properties of SrCo x Fe 1– x O 3−δ , and we examined the preliminary oxygen-production test by using a small-scale PSA apparatus, especially operateing at lower temperature like 300 °C.…”

Crystal structure and magnetic properties of high-oxygen pressure annealed Sr1−xLaxCo0.5Fe0.5O3−δ (0⩽x⩽0.5)

“…The brownmillerite type phase is present for materials with the oxygen vacancy concentration d close to 0.5, and is stable in air at temperatures below 800 1C [13][14][15][16]. For samples with higher oxygen content the cubic related phases are observed in which oxygen vacancies are distributed statistically on the oxygen sublattice [15,17,18]. Also other vacancy ordered phases (e.g.…”

An investigation of the structural and electronic origins of enhanced chemical looping air separation performance of B-site substituted SrFe1−xCoxO3−δ perovskites

“…The values obtained here are similar to those determined in the literature for SrFe 1− x Co x O 3− δ prepared by sol–gel methods. 41,42…”

“…The values obtained here are similar to those determined in the literature for SrFe 1Àx Co x O 3Àd prepared by sol-gel methods. 41,42 3.2 Oxygen uptake and release through temperature swings…”