Pressure swing adsorption for a system with a Langmuir isotherm

Journal Article · Fri Apr 01 04:00:00 EST 1988 · Sep. Sci. Technol.; (United States)

DOI:https://doi.org/10.1080/01496398808060704· OSTI ID:6661263

Lu, X; Rothstein, D; Madey, R; Huang, J C

An analytical expression is obtained for the equilibrium relationship between the enrichment factor of the product stream and the ratio of the pressure in the feed stream to that in the product stream for a pressure-swing-adsorption system with a Langmuir isotherm. The enrichment factor is defined as the ratio of the mole fraction of adsorbate gas in the product stream to that in the feed stream. The Langmuir isotherm is characterized by two parameters k/sub 1/ and k/sub 2/, where k/sub 1/ is proportional to the monolayer adsorption capacity and k/sub 2/ characterizes the nonlinearity of the adsorption isotherm. It is found that the enrichment factor decreases with increasing values of k/sub 2/; thus, the nonlinearity of the isotherm reduces the enrichment factor. A numerical calculation shows that the reduction of the enrichment factor is significant. Also, the enrichment factor increases with increasing values of k/sub 1/; thus, the enrichment factor increases as the monolayer adsorption capacity increases.

• Research Organization: Kent State Univ., OH (USA)
• OSTI ID: 6661263
• Journal Information: Sep. Sci. Technol.; (United States), Journal Name: Sep. Sci. Technol.; (United States) Vol. 23:4-5; ISSN SSTED
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
ADSORPTION
ADSORPTION ISOTHERMS
DATA
EQUILIBRIUM
INFORMATION
ISOTHERMS
MATHEMATICAL MODELS
NUMERICAL DATA
PRESSURE DEPENDENCE
SORPTION
THEORETICAL DATA