Robust numerical simulation of pressure swing adsorption process with strong adsorbate CO2

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Governing equations describing the pressure swing adsorption processes with strong adsorbates were converted into dimensionless forms. The characteristic scales reflecting the system dimensions, operating conditions and physical properties including the isotherms indicated that the gas-phase convection mass transfer balances the adsorbent-phase mass accumulation. The gas-phase accumulation should not be considered a dominant mass transfer mode and would change rapidly with time. In order to avoid stiffness of time derivatives of the gas-phase accumulation and to obtain robust numerical solutions through the diagonally dominant matrices, the two leading terms should coexist in the difference equation. Through the present numerical strategy the convergence of the numerical integration and the accuracy of the simulated results were guaranteed for a wide range of time discretization. The algorithm was found to successfully predict the reasonable behaviors of process variables even for non-isothermal operations. (C) 2004 Elsevier Ltd. All rights reserved.
Publisher
Pergamon-Elsevier Science Ltd
Issue Date
2004
Language
English
Article Type
Article
Keywords

COMPONENT SYSTEM; CARBON-DIOXIDE; POWER-PLANT; SEPARATION; MIXTURES; RECOVERY; REMOVAL; MODEL; AIR; GAS

Citation

CHEMICAL ENGINEERING SCIENCE, v.59, no.13, pp.2715 - 2725

ISSN
0009-2509
DOI
10.1016/j.ces.2004.01.067
URI
http://hdl.handle.net/10203/3605
Appears in Collection
ME-Journal Papers(저널논문)CBE-Journal Papers(저널논문)
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