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Oxygen separation from air by four-bed pressure swing adsorption / Masoud Mofarahi in Industrial & engineering chemistry research, Vol. 48 N° 11 (Juin 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 11 (Juin 2009) . - pp. 5439–5444 Titre : Oxygen separation from air by four-bed pressure swing adsorption Type de document : texte imprimé Auteurs : Masoud Mofarahi, Auteur ; Jafar Towfighi, Auteur ; Leila Fathi, Auteur Année de publication : 2009 Article en page(s) : pp. 5439–5444 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Pressure  swing  adsorption  Zeolite  5A  Oxygen  separation Résumé : A study on a four-bed seven-step pressure swing adsorption (PSA) using zeolite 5A was performed experimentally and theoretically for separation of oxygen from air. In this process the steps of feed pressurization, production, blowdown, purge, pressure equalization (two steps), and product pressurization are included in a cycle. The effects of various operating parameters such as adsorption pressure, cycle time, production rate, and purge rate on the product purity and recovery were investigated experimentally. Oxygen purity and recovery both increase when adsorption pressure increases. For most of the experiments at the highest purge rate, a higher purity of oxygen is obtained, but the recovery of oxygen is reduced. Oxygen recovery increases as production rate increases while the purge flow rate remains constant. It was observed that increasing the cycle time increases the performance of the process. An equilibrium based isothermal model in conjunction with an LDF (linear driving force) approximation was employed to simulate process performance. Comparison of the results obtained from the experiments and simulation results shows reasonable agreement. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801805k [article] Oxygen separation from air by four-bed pressure swing adsorption [texte imprimé] / Masoud Mofarahi, Auteur ; Jafar Towfighi, Auteur ; Leila Fathi, Auteur . - 2009 . - pp. 5439–5444. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 11 (Juin 2009) . - pp. 5439–5444 Mots-clés : Pressure  swing  adsorption  Zeolite  5A  Oxygen  separation Résumé : A study on a four-bed seven-step pressure swing adsorption (PSA) using zeolite 5A was performed experimentally and theoretically for separation of oxygen from air. In this process the steps of feed pressurization, production, blowdown, purge, pressure equalization (two steps), and product pressurization are included in a cycle. The effects of various operating parameters such as adsorption pressure, cycle time, production rate, and purge rate on the product purity and recovery were investigated experimentally. Oxygen purity and recovery both increase when adsorption pressure increases. For most of the experiments at the highest purge rate, a higher purity of oxygen is obtained, but the recovery of oxygen is reduced. Oxygen recovery increases as production rate increases while the purge flow rate remains constant. It was observed that increasing the cycle time increases the performance of the process. An equilibrium based isothermal model in conjunction with an LDF (linear driving force) approximation was employed to simulate process performance. Comparison of the results obtained from the experiments and simulation results shows reasonable agreement. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801805k