Intraparticle diffusion/convection models for pressurization and blowdown of adsorption beds with Langmuir isotherm. [Pressure Swing Adsorption Processes]

Journal Article · Sun Nov 01 04:00:00 EST 1992 · Separation Science and Technology; (United States)

DOI:https://doi.org/10.1080/01496399208019454· OSTI ID:6905690

Lu, Z P; Loureiro, J M ^[1]; LeVan, M D ^[2]; Rodrigues, A E ^[3]

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1. Univ. of Porto, Porto Codex (Portugal)
2. University of Virginia, Charlottesville (United States)
3. University of Porto, Porto Codex (Portugal)

Intraparticle diffusion/convection and equilibrium models are used to simulate the bed dynamics of pressurization and blowdown steps of PSA processes with binary mixtures of inert and adsorbable species. The effect of the nature of the equilibrium isotherm, i.e., linear and Langmuir isotherms, is discussed. The improvement of mass transfer inside the adsorbent by increasing particle permeability or decreasing particle size is addressed. Simulation results show that using large-pore adsorbents, i.e., increasing permeability to cause a high intraparticle convective flow instead of decreasing particle size to reduce intraparticle mass transfer resistances, is a good choice in PSA processes.

• OSTI ID: 6905690
• Journal Information: Separation Science and Technology; (United States), Journal Name: Separation Science and Technology; (United States) Vol. 27:14; ISSN 0149-6395; ISSN SSTEDS
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ADSORBENTS
ADSORPTION
ADSORPTION ISOTHERMS
BINARY MIXTURES
CONVECTION
CRYSTAL STRUCTURE
DATA
DIFFUSION
DISPERSIONS
ENERGY TRANSFER
HEAT TRANSFER
INFORMATION
ISOTHERMS
MASS TRANSFER
MATHEMATICAL MODELS
MICROSTRUCTURE
MIXTURES
PARTICLE SIZE
PERMEABILITY
POROSITY
PRESSURE GRADIENTS
PRESSURIZATION
SEPARATION EQUIPMENT
SEPARATION PROCESSES
SIZE
SORPTION