Abstract: The embodiments of the present disclosure provide a portable oxygen concentrator. The portable oxygen concentrator may comprise an input configured to receive air flow, a column comprising a housing, an outer porous tube, an inner porous tube, and an inner cavity, and an output configured to release oxygen to a user. The inner porous tube comprises an adsorbent bed comprising a plurality of zeolites, and the column is configured to channel air radially through and across the outer porous tube, through and across the adsorbent bed in the inner porous tube, into the inner cavity of the column, and through the output. When the air flow contacts the adsorbent bed, oxygen is released.

Abstract: The embodiments of the present disclosure provide a portable oxygen concentrator. The portable oxygen concentrator may comprise an input configured to receive airflow, an input filter, a compressor configured to compress airflow, a first column comprising a first adsorbent bed, and a second column adjacent to the first column and comprising a second adsorbent bed. The portable oxygen concentrator may further comprise a first output configured to release oxygen to a user, and a second output configured to release waste gas. The first and second adsorbent beds may comprise a plurality of zeolites.