Comparative Study of Carbon Dioxide and Methane Adsorption by Synthesized Fine Particles of SAPO-34 Molecular Sieve

Document Type : Research Article

Authors

Oil and Gas Excellence Department, Faculty of Chemical Engineering, University of Tehran, P.O. Box 11155-4563 Tehran, I.R. IRAN

Abstract

Fine particles Silicoaluminophosphate-34 were synthesized by hydrothermal sol-gel method. The effect of crystallization time, as one of the important synthesis factors on particle size and crystallinity, kinetic and equilibrium adsorption, and selectivity of CO2 / CH4 has been studied in this work. The adsorption isotherms are obtained at moderate gauge pressures (100-3000 kPa) and temperatures (278, 288 and 298 K), and the equilibrium adsorption parameters as well as heat of adsorption are determined for the synthesized SAPO-34. The observed adsorption selectivity of CO2 to CH4 was determined to be around eight for that sample with higher degree of crystallinity.The crystallinity, isotherm parameters, adsorption selectivity and heat of adsorption confirm that the synthesized fine particle of SAPO-34 could be a good candidate for separation of CO2 from CH4.

Keywords

Main Subjects

References

[1] Baker R.W., Future in Directions of Membrane Gas Separation Technology, Ind. Eng. Chem. Res., 41, 1393 (2002).
[2] Yang R.T., “Gas Separation by Adsorption Processes, Butterworth”, Stoneham, p. 10(1997).
[3] Vansant E.F., “Pore Size Engineering in Zeolites”, John Wiley & Sons, p. 145, (1990).
[4] Martens J.A., Grobet P.J., Jacobs P.A., Catalytic Activity and Si, Al, P Ordering in Microporous Silicoaluminophosphates of the SAPO-5, SAPO-11, and SAPO-37, J. of Catal., 126, p. 299 (1990).
[5] Li S., Falconer J.L., Noble R.D., Improved SAPO-34 Membranes for CO2/CH4 Separations, Adv. Mater., 18, p. 2601 (2006).
[6] Bennet J.M., Cohen J.P., Flanigen E.M., Pluth J.J., Smith J.V., Theoretical Studies on Aluminophosphate-5 (AlP04-5), Am. Chem. Soc. Symp. (1983).
[7] Walton K.S., Abney M.B., LeVan M.D., CO2 Adsorption in Y and X Zeolites Modified by Alkali Metal Cation Exchange, Micro. and Meso. Mat., 91, p. 78 (2006).
[8] Himeno S., Tomita T., Suzuki K., Yoshida S., Characterization and Selectivity for Methane and Carbon Dioxide Adsorption on the all-silica DD3R Zeolite, Micro. and Meso. Mat., 98, p. 62 (2007). 
[9] Li P., Tezel F.H., Adsorption Separation of N2, O2, CO2 and CH4Gases by β-Zeolite, Micro. and  Meso. Mat., 98, p. 94 (2007).
[10] Harlick P.J.E., Tezel F.H., Adsorption of Carbon Dioxide, Methane and Nitrogen: Pure and Binary Mixture Adsorption for ZSM-5 with SiO2/Al2O3 Ratio of 280, Sep. and Puri. Tech., 33, p. 199 (2003).
[11] Hong M., Li S., Funke H.F., Falconer J.L., Noble, R.D. Ion-Exchanged SAPO-34 Membranes for Light Gas Separations, Micro. and Meso. Mat., 107, p. 140 (2007).
[12] Mertens M., Strohmaier K.G., Nurray P., Process for Manufacture of Molecular Sieves, US. Pat. No. 6903240 B2 (2005).
[13] Mertens M., Strohmaier K.G., Nurray P., Process for Manufacture of Molecular Sieves, US. Pat. No. 7052664 B2 (2006).
[14] Gholamhosseiny M., Fatemi Sh., Rasoolzadeh M., Hydrogen Adsorption and Equilibrium Models on Multi-Walled Carbon Nanotubes at Moderate Temperatures and Pressures, Inter. J. of Chem. Reac. Eng., 6, p. 84 (2008).
[15] Tosheva, L., Valtchev, V.P., High-Silica Zeolite-β: From Stable Colloidal Suspensions to Thin Films, Chem. Mat., 17, p. 2494 (2005).
[16] Newalker  B.L.,  Choudary  N.V.,  Kumar  P., Komarneni, S., Bhat, T.S.G., Exploring the Potential of Mesoporous Silica, SBA-15, as an Adsorbent for Light Hydrocarbon Separation, Chem. Mater., 14, p. 304 (2002).
[17] Li  S.,  Falconer  J.L.,  Noble  R.D.,  SAPO-34 Membranes for CO2/CH4 Separation, J. of Mem. Sci., 241, p. 121 (2004).
[18] Li  S.,  Falconer  J.L.,  Noble  R.D.,  SAPO-34 Membranes for CO2/CH4 Separation: Effect of Si/Al Ratio, Micro. and Meso. Mat., 110, p. 310 (2008).
Iranian Journal of Chemistry and Chemical Engineering
Volume 29, Issue 3 - Serial Number 55
September 2010
Pages 37-45

Files

Share

How to cite

Statistics