Parametric study of pressure swing adsorption process to purify oxygen using carbon molecular sieve

Min Bae Kim, Jeong Geun Jee, Youn-Sang Bae, Chang-Ha Lee

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

To produce O2 with a high purity of 99+% and a high productivity from various oxygen-rich feeds, a parametric study was done on a six-step pressure swing adsorption (PSA) purifier using carbon molecular sieve (CMS). The cyclic performances of the PSA process such as purity, recovery, and productivity were compared under nonisothermal conditions. To study the effects of N2 amount on the PSA purifier, various feeds with 90% O 2 or more were experimentally and theoretically applied for the PSA process. Since N2 plays a key role in product purity, the maximum purity of the PSA was 99% O2 with 51.5% recovery from a higher nitrogen feed (O2:Ar:N2; 90:4:6 vol %) and 99.8% O 2 with 56.9% recovery from a lower nitrogen feed (O 2:Ar:N2; 95:4:1 vol %) within the experimental range. The adsorption step time and feed flow rate served as key operating variables in the purification of the oxygen-rich feeds because the concentration wave fronts of minor impurities such as N2 and Ar were controlled by kinetic selectivity. To produce 99% O2 purity from feeds with various amounts of N2, the optimum operating variables were set to maximize the recovery and productivity within the experimental ranges. A high feed flow rate accompanied by a short adsorption step time could increase both purity and productivity. Without any serious loss of recovery and productivity, the process could purify the feed with higher than 91% O2 to the product with higher than 99% O2. The nonisothermal model incorporating mass, energy, and momentum balance together with a concentration-dependent rate model could accurately predict the performance results.

Original languageEnglish
Pages (from-to)7208-7217
Number of pages10
JournalIndustrial and Engineering Chemistry Research
Volume44
Issue number18
DOIs
Publication statusPublished - 2005 Aug 31

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Molecular sieves
Carbon
Oxygen
adsorption
Adsorption
oxygen
carbon
Productivity
Recovery
productivity
Nitrogen
Flow rate
nitrogen
Purification
purification
momentum
Momentum
Impurities
kinetics
Kinetics

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Environmental Science(all)
  • Chemical Engineering (miscellaneous)

Cite this

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title = "Parametric study of pressure swing adsorption process to purify oxygen using carbon molecular sieve",
abstract = "To produce O2 with a high purity of 99+{\%} and a high productivity from various oxygen-rich feeds, a parametric study was done on a six-step pressure swing adsorption (PSA) purifier using carbon molecular sieve (CMS). The cyclic performances of the PSA process such as purity, recovery, and productivity were compared under nonisothermal conditions. To study the effects of N2 amount on the PSA purifier, various feeds with 90{\%} O 2 or more were experimentally and theoretically applied for the PSA process. Since N2 plays a key role in product purity, the maximum purity of the PSA was 99{\%} O2 with 51.5{\%} recovery from a higher nitrogen feed (O2:Ar:N2; 90:4:6 vol {\%}) and 99.8{\%} O 2 with 56.9{\%} recovery from a lower nitrogen feed (O 2:Ar:N2; 95:4:1 vol {\%}) within the experimental range. The adsorption step time and feed flow rate served as key operating variables in the purification of the oxygen-rich feeds because the concentration wave fronts of minor impurities such as N2 and Ar were controlled by kinetic selectivity. To produce 99{\%} O2 purity from feeds with various amounts of N2, the optimum operating variables were set to maximize the recovery and productivity within the experimental ranges. A high feed flow rate accompanied by a short adsorption step time could increase both purity and productivity. Without any serious loss of recovery and productivity, the process could purify the feed with higher than 91{\%} O2 to the product with higher than 99{\%} O2. The nonisothermal model incorporating mass, energy, and momentum balance together with a concentration-dependent rate model could accurately predict the performance results.",
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Parametric study of pressure swing adsorption process to purify oxygen using carbon molecular sieve. / Kim, Min Bae; Jee, Jeong Geun; Bae, Youn-Sang; Lee, Chang-Ha.

In: Industrial and Engineering Chemistry Research, Vol. 44, No. 18, 31.08.2005, p. 7208-7217.

Research output: Contribution to journalArticle

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