A COMPLEMENTARY PRESSURE SWING ADSORPTION PROCESS CONFIGURATION FOR AIR SEPARATION

We propose a complementary pressure swing adsorption (CPSA) process co nsisting of four beds for separating air into enriched oxygen and nitr ogen. Simulation results showed that the CPSA process performed better than either the oxygen process or the nitrogen process. Using zeolite 5A and 4A as adsorbents, the mole fraction of oxygen and argon in the enriched oxygen may be as high as 99.57% (at 34.44% recovery), and th e purity of the enriched nitrogen about 98% (at 47.86% recovery). For producing enriched oxygen of 80-90% purity, a modified CPSA process is suggested. The relationships between production rate, purity, and oxy gen and nitrogen recoveries are discussed