Simulation of air liquefaction using aspen plus

Abstract

Air is a mixture of various gases. Each of these gases have got some kind of uses. As such, separation of air into its constituent gases becomes very necessary from commercial point of view. For separation of air into its constituent gases, it is necessary to liquefy the same. In this project, simulation of liquefaction of air, followed by its separation was done using Aspen Plus simulating tool. The model under consideration was Linde single-column system. Also, the effect of various process conditions on the yield and purity of final product were analyzed. It was found that by using Linde single-column system, oxygen of almost 98-99% purity could be obtained. However, the purity of nitrogen obtained was only about 90%.