Closed or semi-closed loop onboard ceramic oxygen generation system

An onboard rebreathing loop system resident on an aircraft for providing oxygen to aircraft personnel, the system comprising:

• a) a ceramic oxygen generating system (COGS) module having a COGS inlet configured to receive an inlet air and a COGS outlet configured to output a high purity oxygen (O2) gas into a breathing loop,
• b) a carbon dioxide (CO2) scrubber module having a scrubber inlet configured to receive exhaled air from the aircraft personnel and a scrubber outlet configured to output a CO2-scrubbed air into the breathing loop,
• c) a gas sensor module configured to receive a mixed gas of the high purity O2 gas and the CO2-scrubbed air and measure a partial pressure of O2 within the mixed gas before breathing by the aircraft personnel,
• d) a backup oxygen system (BOS) containing high purity backup O2 gas, and
• e) a controller communicatively coupled to the COGS module and the gas sensor module, wherein:
• i) the controller instructs the BOS to provide backup O2 gas directly to the aircraft personnel without entering the breathing loop when the gas sensor module measures the partial pressure of O2 within the mixed gas to be below a predetermined threshold;
• and,
• ii) the controller instructs the BOS to input backup O2 gas into the breathing loop when the COGS module is unable to output a required amount of oxygen to maintain the desired partial pressure of O2 within the mixed gas.