We started using larger columns with 750g zeolite capacity and were able to produce 2 L/min of 80% oxygen.

Schematics

• 1-7: 2-way solenoid valve
• Zeolite bed: each ca. 750g LiX
• Feed: 5 bar dry air

Parameters&Performance

• Column housing = Reverse Osmosis Membrane housing
• 750g LiX in each column
• Valves: Festo, Switching controller: Aduino
• 80% oxygen in outlet stream (2 l/min) using pressurised dry air (6 bar) in input.
• Switching cycle: 4.5s pressurizing/blowdown, 0.4s feeding, 1.3s equilibration

Additional information

• List of components + cost estimation