Oxygen separation via chemical looping of the perovskite oxide Sr0.8Ca0.2FeO3 in packed bed reactors for the production of nitrogen from air

Thermochemical process and compact apparatus for concentrating oxygen in extraterrestrial atmospheres: a feasibility study

“…It is important to note that the actual percentage of oxygen uptake depends on a number of factors, including the material-specific oxidation kinetics, the structure of the POP system and the operating conditions, which need to be optimized in an experimental study. However, it is clear from the literature that oxygen uptake in perovskites is enhanced when a lower oxygen content is present in the gas stream 54 . Therefore, with optimized operating conditions, high oxygen uptake is more likely.…”

Impact of the Sr content on the redox thermodynamics and kinetics of Ca1−xSrxMnO3−δ for tailored properties

“…This method was used for similar studies on perovskites. [40][41][42] It is assumed that the process rates can be parameterized by the temperature T, the conversion extent X and the pressure P…”

Energetic optimization of thermochemical air separation for the production of sustainable nitrogen

“…In the parametric study, the work of the PSA is indeed included. The energy demand of a PSA for producing one mole nitrogen with an oxygen impurity mole fraction x O 2 is calculated by: 19 …”

“…Here, x N 2 ,air denotes the nitrogen molar fraction in air and ν PSA-recovery denotes the nitrogen recovery fraction. 19 The energy to compress the air W comp is calculated with an adiabatic compression in a single-stage compressor with an efficiency of 84%: 19 …”

“…In order to calculate the non-stoichiometries for the reduced and oxidized state, their empirical model is used. 19 The enthalpy used is shown in ESI †. The oxidation and reduction temperatures are fixed at their selected test case scenario.…”