Membranes for gas separation work on the principle of selective permeation through the membrane surface. The hollow fibre membranes made of SEPURAN® N2 polyimide used here have low air consumption and generate a high nitrogen capacity over a wide temperature range. Performance remains stable over the entire service life and nitrogen purity of up to 99,5% is achieved. Energy consumption is very low. Auxiliary materials such as water or chemicals are not required.
The CE 550 experimental unit shows a low-maintenance and efficient process for producing nitrogen from air. Compressed air is forced through a bundle of hollow fibres. The air mixture flows through the fibres and oxygen, water vapour and other gases diffuse through the fibres, while the nitrogen is retained. At the end of the process, concentrated, dry nitrogen is collected as the product gas (retentate). The separated gas mixture (permeate) escapes into the environment as a by-product. The operating parameters of the membranes are displayed on the screen. The experimental setup can be observed through an illuminated viewing window.
The residual oxygen content in the retentate, the pressure in the air supply and the back pressure in the permeate exhaust line can be adjusted.Two thermostat-controlled ventilators are installed to cool the measuring device.
The experimental unit is controlled and operated via the integrated PLC with touchscreen. The most important parameters are continuously measured and displayed. The entire process as well as the air factor and pressure loss across the membrane module are displayed. A compressed air system with suitable compressed air treatment or synthetic compressed air from compressed air cylinders, with a connected pressure regulator (max. pressure 20 bar g) is required.
