Thermal Swing Reduction-Oxidation of Me(Ba, Ca, or Mg)SrCoCu Perovskites for Oxygen Separation from Air

The climate change impact associated with greenhouse gas emissions is a major global concern. This work investigates perovskite compounds for oxygen separation from air to supply oxyfuel energy systems abate these significant environmental impacts. perovskites studied were Me0.5Sr0.5Co0.8Cu0.2O3−δ (MeSCC) where the A-site substitution was carried out by four different cations (Me = Ca, Mg, Sr, or Ba). SEM analysis showed formation of small particle (<1 µm) aggregates varying morphological features. XRD confirmed that all hexagonal phase. Under reduction and oxidation reactions (redox), Ba Ca substitutions resulted in highest lowest release, respectively. In terms real application air, as BaSCC proved be preferable due short temperature cycles uptake release 134 °C, contrary long undesirable 237 °C. As result, unit 0.66 m3, containing 1000 kg BaSCC, can produce 18.5 ton y−1 pure using conservative heating rate 1 °C min−1. By increasing further min−1, production almost doubled 16.7 y−1. These results strongly suggest advantages thermal novel designs separation. stable under 22 cycles, coupled production, demonstrates potential this technology reduce emission gases.