Combination Mutual Pressure Swing Adsorption and Cryogenic Process to Optimize Air Separation Unit


Air separation unit (ASU) has become a process integral to many other processes mainly because of the significance of its constituents in many industrial applications. Eminent among them are nitrogen, oxygen and argon. New combination air separation processes for oxygen production are developed that use an uncommon adsorption unit, Mutual Pressure-Swing Adsorption (MPSA) [also known as feed purge pressure swing adsorption], to increment the oxygen concentration of the feed to the cryogenic distillation plant. Two cases are studied: 1-MPSA before the main air compressor increases oxygen concentrations. 2-MPSA after the main air compressor increases oxygen concentrations to significantly higher values. The goal of this work is to assign demonstration of concept for combination air separation processes, based on our findings to optimize the units.

Keywords: PSA, Cryogenic, Air Separation, Oxygen

PDF Format of Article


  • Burdyny, H. Struchtrup, Hybrid membrane/cryogenic separation of oxygen from air for use in the oxy-fuel process, Energy 35 (2010) 1884e1897.
  • Jones, D. Bhattacharyya, R. Turton, S.E. Zitney, Optimal design and integration of an air separation unit (ASU) for an integrated gasification combined cycle (IGCC) power plant with CO2 capture, Fuel Process. Technol. 92 (2011) 1585e1595.
  • Liszka, A. Ziḛbik, Coal-fired oxy-fuel power unit – process and system analysis, Energy 35 (2010) 943e951.
  • Yari, S.M.S. Mahmoudi, Utilization of waste heat from GT-MHR for power generation in organic Rankine cycles, Appl. Therm. Eng. 30 (4) (2010) 366e375.
  • Potential for improving the energy efficiency of cryogenic air separation unit (ASU) using binary heat recovery cycles. Mathew Aneke*, Meihong Wang, Applied Thermal Engineering 81 (2015) 223e231.
  • Li, H. Chen, X. Zhang, C. Tan, Y. Ding, Renewable energy carriers: hydrogen or liquid air/nitrogen? Appl. Therm. Eng. 30 (2010) 1985e1990.
  • Rizk, M. Nemer, D. Clodic, A real column design exergy optimization of a cryogenic air separation unit, Energy 37 (2012) 417e429.
  • UIG, Non-cryogenic Air Separation Processes, Universal Industrial Gases, Inc, 2008.
  • Zhu, S. Sun, Y. He, Y. Cong, W. Yang, New concept on air separation, J. Membr. Sci. 323 (2008) 221e224.
  • Fu, G. Truls, Using exergy analysis to reduce power consumption in air separation units for oxy-combustion processes, Energy 44 (2012) 60e68.
  • Zhu, S. Legg, C.D. Laird, Optimal design of cryogenic air separation columns under uncertainty, Comput. Chem. Eng. 34 (2010) 1377e1384.
  • Baker R (2004) Membrane technology and applications, 2nd Edn
  • A review of air separation technologies and their integration with energy conversion processes, A.R. Smith, J. Klosek, Fuel Processing Technology 70 (2001). 115–134
  • McGuinness, R.M.; Kleinberg, W.T. (1998) Oxygen Production. In: Oxygen-Enhanced Combustion; Baukal, C.E. Jr., Ed.; CRC: Boca Raton, Florida.
  • Kumar, R.; Huggahalli, M.; Deng, S.; Andrecovich, M. (2003) Trace impurity removal from air. Adsorption., 9: 243.
  • A review of air separation technologies and their integration with energy conversion processes, A.R. Smith, J. Klosek, Fuel Processing Technology 70 (2001). 115–134
  • Skarstrom, C.W. (1966) Oxygen Concentration Process. U.S. Patent 3,237,377.
  • Kostroski, K.P. Ph.D. (2008) Thesis, Purdue University, West Lafayette, IN.