Gas Separation Experiment

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Abstract

This experiment investigated gas separation of nitrogen and oxygen from air. The separation is carried out through hollow fiber membranes. The Federal Aviation Administration (FAA) has asked for an evaluation of the number of modules necessary, the feed air requirements, and the compression requirements to inert the combined fuel tank ullage of a generic aircraft. The data collection occurred at a set pressure of 70 psig and then varying the flow rates. The concentrations of oxygen and nitrogen were recorded once the system was stabilized. The data was collected at counter-current and co-current flows to assess which was more effective at separation. The co-current model proved to separate the nitrogen more effectively, but the counter current model showed higher concentrations of oxygen at the same flows. The recovery was 0.878 for the counter current system compared to the 0.862 recovery for the cross current system. The counter current proved to be a better option to apply to this system and expand to the number of membrane modules required for the aircraft.

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