Membrane Nitrogen Generators – Compact Solutions for Mobile Applications

These systems utilize bundles of hollow-fiber polymer membranes to separate gases. When compressed air enters the module, faster-permeating molecules (O₂, CO₂, H₂O) diffuse through the membrane walls, while nitrogen (95-99.5% purity) exits through the core. The process requires no moving parts or consumables, making it ideal for remote operations.

While offering simplicity and low maintenance, membranes have tradeoffs:

• Purity capped at 99.5% due to gas permeability limits
• Flow rates decrease by 0.5-1% annually as membranes age
• Compressed air must be pre-dried to -40°C dew point

1. Offshore Platforms: Explosion-proof models prevent oil rig fires.
2. Food Packaging: USDA-approved systems extend shelf life without chemical additives.
3. Mobile Labs: Lightweight units (as low as 15kg) support field research.

Hybrid configurations are increasingly popular. For example:

• A membrane unit provides 98% nitrogen for tire inflation
• Downstream PSA modules boost purity to 99.9% for aircraft fuel tank inerting
• This approach reduces energy use by 22% compared to standalone PSA systems.