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http://dx.doi.org/10.9713/kcer.2016.54.6.838

Adsorption Characteristics of Flue Gas Components on Zeolite 13X and Effects of Impurity  

Suh, Sung-Sup (Department of Chemical Engineering, Hong-Ik University)
Lee, Ho-Jin (Department of Chemical Engineering, Hong-Ik University)
Publication Information
Korean Chemical Engineering Research / v.54, no.6, 2016 , pp. 838-846 More about this Journal
Abstract
Most of combustion processess used in industries require recovering or removing flue gas components. Recently a new MBA (moving bed adsorption) process for recovering $CO_2$ using zeolite 13X was developed. In this study, adsorption experiments for carbon dioxide, nitrogen, sulfur dioxide, and water vapor on zeolite 13X were carried out. Adsorption equilibrium and adsorption rate into solid particle were investigated. Langmuir, Toth, and Freundlich isotherm parameters were calculated from the experiment data at various temperatures. Experimental results were consistent with the theoretically predicted values. Also $CO_2$ adsorption amount was measured under the conditions with impurities such as $SO_2$ and $H_2O$. Binary adsorption data were well fitted to the extended Langmuir isotherm using parameters obtained from pure component experiment. However, $H_2O$ impurity less than, roughly, ${\sim}10^{-5}H_2O\;mol/g$ zeolite 13X enhanced slightly $CO_2$ adsorption. Spherical particle diffusion model well described experimentally measured adsorption rate. Diffusion coefficients and activation energies of $CO_2$, $SO_2$, $N_2$, $H_2O$ were obtained. Diffusion coefficients of $CO_2$ and $SO_2$ decreased with small amount of preadsorbed impurity. Parameter values from this study will be helpful to design of real commercial adsorption process.
Keywords
Zeolite 13X; Flue gas; $CO_2$; $SO_2$; $N_2$; $H_2O$; Impurity; Adsorption; Isotherm; Adsorption rate; Diffusivity;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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