CO2 Adsorption on HZSM-5 Zeolite : Mass Transport Study in A Packed Bed Adsorber

https://doi.org/10.22146/ajche.50116

Sang Kompiang Wirawan(1*), Ihda Novia Indrajati(2), Wahyudi Budi Sediawan(3), Panut Mulyono(4), Derek Creaser(5)

(1) Department of Chemical Engineering, Gadjah Mada University, 55281 Yogyakarta, Indonesia Chemical Reaction Engineering, Chalmers University of Technology, SE-412 96, Göteborg, Sweden
(2) Department of Chemical Engineering, Gadjah Mada University, 55281 Yogyakarta, Indonesia
(3) Department of Chemical Engineering, Gadjah Mada University, 55281 Yogyakarta, Indonesia
(4) Department of Chemical Engineering, Gadjah Mada University, 55281 Yogyakarta, Indonesia
(5) Chemical Reaction Engineering, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
(*) Corresponding Author

Abstract


Experimental and modeling have been done to study and to determine the diffusion parameters of CO2 adsorption on HZSM-5 zeolite in a packed­bed adsorber. Experiment works consisted of tracer and adsorption experiments. The feed gas concentrations were 40 and 80% CO2 in helium within various temperatures of 373, 423 and 473 K. The experiments were conducted by using transient step change adsorption. Tracer experiments using 20% Ar/He were conducted to measure dispersion and time lag effect of the packed bed system. A model of CO2 adsorption on HZSM­5 had been set up for transient packed­bed adsorber by assuming plug flow, isothermal and isobaric, single site Langmuir physisorption, no gas film mass transport resistance and Maxwell­Stefan mass transport in micropore applied. All the data were then optimized to get the best value of modified fitted parameter. The results indicated that at higher temperature, the quantities of gas adsorbed were decrease. This was due to lower adsorption capacity which occurs at higher temperature. The model was in a good agreement with the experiment data. Diffusivity tended to increase by increasing temperatures.

Keywords


transient step-change, surface diffusion, and Maxwell-Stefan



References

  1. Calleja, G., Pau, J., Calles, J.A. (1998). "Pure and Multicomponent Adsorption Equilibrium of Carbon Dioxide, Ethylene and Propane on ZSM-5 Zeolites with Different SiAl Ratios," J. Chem. Eng. Data, 43, 994.
  2. Choudhary, VR., Mayadevi, R., Rao, M., Sircar, S., Gorte, R.J., Myers, A.L. (1996). "Calorimetric Heats of Adsorption and Adsorption Isotherms. 1. O2, N2, Ar, CO2, CH4, C2H6, and SF6 on Silicalite," Langmuir, 12, 5888.
  3. Cutlip, M. B. and Shacham, M.,(2000). Problem Solving in Chemical Engineering with Numerical Methods, Prentice­Hall, Inc., New Jersey, pp.112­114.
  4. Dunne, J.A., Mariwala, R, Rao, M., Sircar, S., Gorte, R.J., Myers, A.L. (1996). "Calorimetric Heats of Adsorption and Adsorption Isotherms. 1. O2, N2, Ar, CO2, CH4, C2H6, and SF6 on Silicalite," Langmuir, 12, 5888.
  5. Fogler, H. S., (1999), Element of Chemical Reaction Engineering, 3rd ed., Prentice­ Hall, Inc., New Jersey, 809­887 Golden, T.C., Sircar, S. (1994). "Gas Adsorption on Silicalite," J. Colloid Interface Sci., 162, 182. 
  6. Harlick, P.J.E., Tezel, F.H. (2002). "Adsorption of Carbon Dioxide, Methane and Nitrogen: Pure and Binary Mixture Adsorption by ZSM-5 with SiO2/Al2O3 Ratio of 30," Sep. Sci. Technol., 37, 33.
  7. Harlick, P.J.E., Tezel, F.H. (2003). "Adsorption of carbon dioxide, methane and nitrogen: pure and binary mixture adsorption for ZSM-5 with SiO2/Al2O3 ratio of 280," Sep. Purif. Technol., 33, 199.
  8. Harlick, P.J.E., Tezel, F.H. (2004). "An experimental adsorbent screening study for CO2 removal from N2," Microporous Mesoporous Mater., 76, 71. 
  9. Katoh, M., Yoshikawa, T., Tomonari, T., Katayama, K., Tomida, T. (2000). "Adsorption Characteristics of Ion-Exchanged ZSM-5 Zeolites for CO2/N2 Mixtures," J. Colloid Interface Sci., 226, 145.
  10. Koriabkina, A. O., de Jong, A. M., Hensen, E. J. M. and van Santen, R. A.( 2005). Concentration and Temperature Dependence of The Diffusivity of n­Hexane in MFI Zeolites, 50 CO2 Adsorption on HZSM-5 Zeolite : Mass Transport Study in A Packed Bed Adsorber Micropor. Mesopor. Mater., 77: 119­129
  11. Krishna, R. and Baur, R. (2003). Modelling Issues in Zeolite Based Separation Processes, Sep. Purif. Technol., 33: 213­245 
  12. Kärger, J., Pfeifer, H., Stallmach, F., Feokistova, N. N. and Zhdanov, S. P., (1993). 129 Xe and 13 C PFG n.m.r. Study of The Intracrystalline Selfdiffusion of Xe, CO2 and CO, Zeolites, 13: 5055
  13. Otto, K., Montreuil, C.N., Todor, O., McCabe, R.W., Gandhi, H.S. (1991). "Adsorption of hydrocarbons and other exhaust components on silicalite," Ind. Eng. Chem. Res., 30, 2333.
  14. van de Graaf, J. M., Kapteijn, F. and Moulijn, J.A., (1998). Zeolitic Membranes in A. Cybulski and J. A. Moulijn (eds): Structured Catalysts and Reactors, Marcel Dekker, Inc., New York 543.
  15. Wirawan, S.K., Creaser, D. (2006). "CO2 adsorption on silicalite-1 and cation exchanged ZSM-5 zeolites using a step change response method," Micropor. Mesopor. Mater., 91 196. Yamazaki, T., Katoh, M., Ozawa, S., Ogino, Y. (1993). "Adsorption of CO2 over univalent
  16. cation-exchanged ZSM-5 zeolites," Mol. Phys.,80, 313.



DOI: https://doi.org/10.22146/ajche.50116

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