| Typical Feed Gas |
Compressed air |
| Target Product |
N₂-rich gas |
| Main Separation Objective |
Nitrogen generation |
| Typical Membrane Material |
Modified polymer (polyimide-based) |
| Membrane Structure |
Hollow fiber membrane |
| Separation Principle |
Solution–diffusion based on permeation rate differences |
| Fast Gases |
O₂, CO₂, H₂O |
| Slow Gases |
N₂ (retained side) |
| Driving Force |
Partial pressure difference across membrane |
| Typical Product Purity |
N₂: 95–99.9% |
| Typical Recovery Rate |
Adjustable via module configuration |
| Membrane Module Design |
Shell-and-tube–type membrane separator |
| Module Construction |
Tens of thousands of hollow fibers potted with epoxy resin |
| Flow Configuration |
Axial flow along fiber length |
| Pressure Vessel Standards |
ASME, European, Russian, Chinese standards |
| Module Configuration |
Series / parallel |
| Internal-Pressure Membranes |
P1, N1, N2, N3, P3 |
| Operating Pressure |
Compressed air pressure |
| Operating Temperature Sensitivity |
Higher temperature → lower N₂ recovery |
| Start-up Time |
<10 minutes |
| Maintenance Requirement |
No moving parts, minimal maintenance |
| Membrane Lifetime |
≥10 years |
| System Form |
Skid-mounted |
| Flexibility & Scalability |
Easy capacity expansion by adding modules |
| Energy Consumption |
Low, only air compression |
| Typical Applications |
Industrial nitrogen supply, inerting |
| Environmental Adaptability |
Industrial and outdoor environments |
