Nitrogen-Enriched Membrane

‌Working Principle

The nitrogen-enriched membrane utilizes the difference in solubility and diffusion rates of nitrogen and oxygen in air when subjected to pressure differences across the membrane. Gases with faster permeation rates, such as water vapor and oxygen, pass through the membrane more readily, becoming oxygen-enriched gas. Meanwhile, nitrogen, which permeates more slowly, accumulates on the retention side, becoming dry, nitrogen-enriched gas.



Product Features

No Phase Change: The separation process involves no phase change, resulting in minimal nitrogen pressure loss and low energy consumption.



Simple Operation: With no moving parts, it operates continuously and reliably, requiring minimal maintenance.

Adjustable Flexibility: The nitrogen concentration and flow rate can be adjusted based on requirements.

Quick Start/Stop: The system produces stable nitrogen-enriched gas within minutes of startup.


Low Operating Cost: Compact design with low running costs.

Oxygen-Enriched Option: The system can also produce oxygen-enriched gas with up to 50% purity.


Materials and Structure


Membrane Materials: Primarily divided into metal, inorganic, and polymer membranes based on material composition.

Membrane Configurations: Available in flat-sheet, spiral-wound, and hollow-fiber forms, with hollow-fiber polymer membranes being the most promising for wide applications.






Application Areas

Oil and Gas: Drilling and production of oil and natural gas, coal bed methane extraction, tank and vessel sealing, offshore platforms, oil storage, and well protection.

Transport: Protective gas for transporting flammable and explosive hazardous materials.

Chemical/Light Industry: Inert gas protection during purging, sealing, and displacement processes; prevention of plastic and rubber oxidation; protective gases for glass, drying, chemical storage, and hazardous material protection.

Metallurgy: Protective gases for powder metallurgy, continuous casting, continuous rolling, and steel annealing.

Electronics and Telecommunications: Moisture-proofing, anti-oxidation, and protective gases during electronic component manufacturing and drying.

Heat Treatment: Protective gases for annealing, carburizing, quenching, carbonitriding, and welding processes.

Agriculture and Food: Fruit storage, vegetable preservation, pest prevention in grain storage.

Coal/Storage: Fire prevention, explosion protection, and protective gas during gas transport and packaging.

Pharmaceuticals: Covering, nitrogen blanketing, and protective gases during gaseous transport and packaging.

Cultural Heritage Preservation: Fire prevention and anti-oxidation protection for artifacts and museum storage.

Confined Spaces: Protective gas for electrical rooms, archive storage, and cable layers.