# Zeolite molecular sieve

The adsorbent in a PSA column that holds back nitrogen and lets oxygen through.

## Sources

- [Ultra Controlo, Medical gas answers: glossary](https://www.ultracontrolo.com/medical-gas-answers#term-zeolite)

Reviewed: 2026-10-22. Ultra Controlo engineering. https://library.ultracontrolo.com/glossary/zeolite/