A comprehensive review on oxygen transport membranes: Development history, current status, and future directions

Room-Temperature Oxygen Transport in Nanothin BixOySez Enables Precision Modulation of 2D Materials

“…With regard to II, the mechanism for oxygen transport through crystals has been well studied, , including light-induced diffusion, and we suspect something similar is taking place. We hypothesize that oxygen molecules adsorb onto the surface, disassociate into individual atoms assisted by laser exposure, and enter the lattice through an oxygen vacancy, where they move through the lattice using a bulk diffusion process . Additional information can be found in Section S1 in the Supporting Information.…”

“…This is expected, since oxygen vacancies are generally required for high oxygen transport speeds. 15,51 We hypothesize that the materials' tolerance for higher vacancy densities allows the crystal structure to remain stable as selenium is slowly removed and exchanged with oxygen atoms, until R3m Bi 2 O 3 is formed. With regard to II, the mechanism for oxygen transport through crystals has been well studied, 51,52 including light-induced diffusion, 43 and we suspect something similar is taking place.…”

Producing oxygen and fertilizer with the Martian atmosphere by using microwave plasma

“…Utilization of this energy could enable the use of O 2 -separation technologies, which operate at high temperature. This includes emerging technologies such as oxygen transport membranes 62 or, indeed, more mature techniques such as SOECs. Hence, synergies with such O 2 -separation technologies, enabling production of a pure O 2 stream, and plasma technology could yield very interesting pathways for future innovations.…”

“…Utilization of this heat downstream presents an opportunity to reduce overall energy costs when this energy could be efficiently recovered, 68 for example, to heat the incoming gas before plasma conversion (with benefits to CO 2 and N 2 dissociation) or to provide heat energy for another chemical reaction or system downstream. In addition, we plan to explore synergies with O 2 -separation technologies, which operate at high temperatures, such as SOEC 8,14,69 or oxygen transport membranes, 62 by using the heated plasma exhaust to activate a downstream product separation.…”

Membranes Targeting Industrial O2 Production from Air – A Short Review

“…Mid-and longterm stability tests for continuous operation in such environments are still needed to prove industrial applicability. Proposed stabilization methods include covering with protective coating [64,65], modifying composition [66] and using two phases, one focused on electron conduction and one focused on ion conduction (dual-phase OTMs [67,68]). Most promising dual-phase OTMs so far are listed in the detailed review of Kiebach et al [69], with CGO-LSCF having the highest flux (6.23 ml(STP)/cm 2 /min at 1173K, corresponding to 6590 GPU with "infinite" selectivity of an equivalent polymeric membrane) so far with a 200 h tested stability [70].…”