Effect of intraparticle forced convection on gas desorption from fixed beds containing large-pore adsorbents

Journal Article · Mon Jun 01 04:00:00 EDT 1992 · Industrial and Engineering Chemistry Research; (United States)

DOI:https://doi.org/10.1021/ie00006a016· OSTI ID:7016242

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

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1. Lab. of Separation and Reaction Engineering, Univ. of Porto, 4099 Porto Codex (Portugal)
2. Virginia Univ., Charlottesville, VA (United States). Dept. of Chemical Engineering

The importance of intraparticle convection on the desorption of gases from fixed beds with large-pore adsorbents is assessed on the basis of modeling studies. A complete model for isothermal fixed-bed desorption of linear and nonlinear absorbed species includes axial dispersion, intraparticle diffusion, and intraparticle forced convection. Velocity and total pressure changes in the bulk fluid phase as well as in the intraparticle fluid are considered. In this paper several limiting cases are shown as simplifications of the complete model. In a certain range of the number of intraparticle diffusion units, intraparticle forced convection leads to a better efficiency of the desorption process. This is a consequence of the augmented effective diffusivity by convection inside the adsorbent particle.

• OSTI ID: 7016242
• Journal Information: Industrial and Engineering Chemistry Research; (United States), Journal Name: Industrial and Engineering Chemistry Research; (United States) Vol. 31:6; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
ADSORBENTS
CONVECTION
DESORPTION
ENERGY TRANSFER
FLOW MODELS
FLUIDS
FORCED CONVECTION
GASES
HEAT TRANSFER
ISOTHERMAL PROCESSES
MASS TRANSFER
MATHEMATICAL MODELS
PACKED BEDS
PHASE STUDIES
SORPTION
VELOCITY