Dynamic simulation of high-purity twin-bed N2-PSA plants

Abstract At present, nitrogen production from air by pressure swing adsorption (PSA) is simulated almost exclusively at low product purity levels (< 99% N 2 ). However, with increasing global demand for highly purified gases provided energy-efficient separation processes the requirement either extensive experimental research in high-purity range or predictive computer simulations arises. This paper presents a mathematical model of twin-bed PSA plant equipped carbon molecular sieve (Shirasagi MSC CT-350) generation (99.9–99.999% The implemented process simulator Aspen Adsorption™. influence operating conditions as well cycle organisation on performance validated, especially pressure, temperature, half-cycle time, purge flow rate, and cutting time. precision prediction numerical critically discussed. Based new insights efficiency improvement strategies focus reduced energy consumption are introduced discussed means radar charts.