A membrane technology nitrogen generator is a simple and robust system that generates an endless supply of nitrogen by separating it from normal air. An instrument-quality, or oil-free, air compressor is used to provide input to the system. The air is filtered and dried in multiple stages before entering the generator. The generator separates the other constituents of air (predominately oxygen) and they are exhausted to atmosphere while the nitrogen is routed to the process.

Path will utilize a 750CFM model generator for this project and sustain 8% or less oxygen in the tank until athos® HD processing is complete, and the tank must be made safe for entry. The unit is capable of producing nitrogen up to 99.9% purity. Oxygen deficiency will eliminate potential for explosion and prevent any issues with oxidizers such as iron sulfides (FeS). The nitrogen also acts as a vapor blanket, suppressing hydrocarbon vapors and preventing their expulsion from the tank.