The Dual Reflux Pressure Swing Adsorption (DR-PSA) system is a lab scale unit operation designed to test adsorption media and processes. A key focus of recent research includes the separation of nitrogen from methane. The custom designed system has two 50mm diameter and 1m long adsorption columns, precise instrumentation and a fully automated control system. Product and waste gas streams are analysed via online mass spectrometers. The system allows characterisation and optimisation of separation processes leading to more accurate models and upscaling to large scale plant.