What is the lifespan of a molecular sieve?
- - Typically 2–5 years, depending on conditions (temperature, contaminants, regeneration cycles). Performance decline shows as reduced adsorption or increased pressure drop.
Why does a molecular sieve crumble or break?
- Mechanical wear: High gas velocity or improper packing.
Thermal stress: Rapid temperature changes during regeneration.
Liquid exposure: Water ingress damages pores (pre-treatment required).
What if adsorption efficiency drops?
- Check regeneration completeness.
Test for oil/dust in feed gas (install filters).
Verify sieve type matches the application.
How to store molecular sieves?
- Keep sealed, away from moisture.
Avoid contact with acids/alkalis.
Do not exceed stacking height limits.
Are molecular sieves toxic?
- - Non-toxic, but dust may irritate airways—wear a mask when handling.
Can molecular sieves be reused?
- Yes, but periodic regeneration is needed. Severe contamination (e.g., oil) may require replacement.
How to test sieve performance?
- Lab methods: BET surface area analysis, adsorption isotherms.
Field methods: Measure outlet gas dew point or CO₂ concentration (vs. baseline).
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