Simulation and analysis of cryogenic air separation process : case study Khartoum refinery company)

Abstract

Cryogenic air separation is a process by which highly purified gases or liquids are produced. This is achieved by taking large volumes of air from the atmosphere, which is then compressed, cooled, and liquefied. Through a process of distillation the air is then separated into its major components. The applications of air component in refinery are FCC Enrichment and NOx Reduction, Sulfur Recovery and Acid Gas Plants, Streamlining, Pressure and Leak Testing, Purging and Blanketing, Process Chilling and Process Equipment Cooling. Process simulations enable us to find stable operation point with optimal condition for the process examined. HYSYS programme is used to simulate the process to examine the effect of change reflux ratio and tray number on the performance and then analyze the results obtained.