Dynamic modeling of fixed-bed adsorption of flue gas using a variable mass transfer model

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This study introduces a dynamic mass transfer model for the fixed-bed adsorption of a flue gas. The derivation of the variable mass transfer coefficient is based on pore diffusion theory and it is a function of effective porosity, temperature, and pressure as well as the adsorbate composition. Adsorption experiments were done at four different pressures (1.8, 5, 10 and 20 bars) and three different temperatures (30, 50 and 70 A degrees C) with zeolite 13X as the adsorbent. To explain the equilibrium adsorption capacity, the Langmuir-Freundlich isotherm model was adopted, and the parameters of the isotherm equation were fitted to the experimental data for a wide range of pressures and temperatures. Then, dynamic simulations were performed using the system equations for material and energy balance with the equilibrium adsorption isotherm data. The optimal mass transfer and heat transfer coefficients were determined after iterative calculations. As a result, the dynamic variable mass transfer model can estimate the adsorption rate for a wide range of concentrations and precisely simulate the fixed-bed adsorption process of a flue gas mixture of carbon dioxide and nitrogen.
Publisher
KOREAN INSTITUTE CHEMICAL ENGINEERS
Issue Date
2016-02
Language
English
Article Type
Article
Keywords

PRESSURE-SWING ADSORPTION; CARBON-DIOXIDE; ACTIVATED CARBON; ZEOLITE 13X; CO2 RECOVERY; PSA PROCESS; NITROGEN; SEQUESTRATION; SEPARATION; MIXTURES

Citation

KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.33, no.2, pp.438 - 447

ISSN
0256-1115
DOI
10.1007/s11814-015-0180-1
URI
http://hdl.handle.net/10203/208000
Appears in Collection
CBE-Journal Papers(저널논문)
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