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Adsorption of CO2, CH4 and H2 onto zeolite 13 X: Kinetic and equilibrium studies
Hedi Jedli1, Souhail Mohammed Bouzgarrou2,3, Rym Hassani4
1University of Monastir, National Engineering School of Monastir, Laboratory of Studies of Thermal Systems and Energy, LR99ES31, 5019, Monastir, Tunisia.
Abstract:
Adsorption equilibrium and kinetics of CO2, H2 and CH4 on zeolite 13 X were carried out using the volumetric method. The zeolite 13 X was characterized via XRD, SEM and N2 adsorption-desorption. Adsorption isotherms of various gas were investigated over a full range of temperatures at 298, 308 and 313 K. Langmuir's equilibrium model and the heat of adsorption was used to correlate the adsorption isotherms over a wide range of pressure. A classical micropore diffusion approach was applied to investigate the kinetic adsorption. At 298 K, the selectivity of CO2/H2 and CO2/CH4 of the zeolite 13 X was 16.52 and 62.61, respectively. However, zeolite 13 X is one of the most suitable adsorbents for CO2 and CH4 storage, since it has a very high adsorption capacity for both gases. The influence of gas pressure on diffusivity for various absorber-adsorbent systems has been examined. The adsorption experiments with gas mixtures such as H2, CO2 and CH4 on 13 X zeolite show that this adsorbent has potential application in the gas separation and purification process.
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