Abstract: A system for removing oxygen molecules and ozone molecules from an airstream includes a dual core ozone converter having a first core and a second core separated by a gap G, and an air separation module for extracting oxygen molecules (O2) from the airstream, wherein the dual core ozone converter increases the oxygen concentration by removing the ozone present in the airstream, and the air separation module extracts the oxygen from the airflow exiting the dual core ozone converter.