, Volume 19, Issue 1, pp 49–61 | Cite as

Preparation and characterization of double metal-silica sorbent for gas filtration

  • Ebenezer Twumasi Afriyie
  • Peter Norberg
  • Christer Sjöström
  • Mikael Forslund


This paper presents the preparation of a porous (Mg, Ca) silicate structure, which could be employed as sorbent filter media. The sorbents have been prepared using sodium silicate precipitated with various ratios of magnesium and calcium salts. The sorbents obtained were characterized using scanning electron microscope (SEM), X-ray diffraction (XRD) and nitrogen physisorption isotherm. Further, the applicability and performance of the sorbent impregnate with potassium hydroxide for removal of sulphur dioxide (SO2) has been demonstrated. From the isotherms, specific surface area, pore diameter and volume of pores were estimated. Results show that the chemical composition and textural properties of the resultant sorbents were highly dependent on Mg/Ca molar ratio. It was found that sorbents made with 68 mol% Mg and 32 mol% Ca (PSS-MgCa-68/32); and 75 mol% Mg and 25 mol% Ca (PSS-MgCa-75/25) exhibited even higher specific surface area and pore volume than the sorbents containing a single metal. The Mg/Ca-silica sorbents obtained contains interconnected bimodal porosity with large portions being mesopores of varied sizes. The pore size distribution (PSD) results further indicate that PSS-MgCa-68/32 sorbent exhibits wide PSD of interconnected pores in the size range of 1 to 32 nm while PSS-MgCa-50/50 and PSS-MgCa-75/25 exhibits narrow PSD of 1 to 5 nm. Using SO2 as model contaminate gas, it was shown that the dynamic adsorption performance of the PSS-MgCa-sorbents impregnated with 8 wt% KOH exhibits SO2 uptake, with impregnated PSS-MgCa-68/32 showing better performance. This shows that the materials prepared can be used as adsorbent for gas filtration.


Mg/Ca-silica sorbent Gas filtration Characterization Textural properties Impregnate Mg/Ca-silica sorbents 



maximum mesopores size distribution


maximum micropores size distribution


Nonlocal Density Functional Theory


Relative pressure


Pore Size Distribution


Specific Surface area obtained via Brunauer-Emmet-Teller-equation


Mesoporous surface area obtained via t-plot


Micropore surface area obtained via t-plot


Mesoporous pore volume obtained via t-plot


Microporous pore volume obtained via t-plot


Total pore volume





We are grateful to Svenska Aerogel AB for providing the sorbents used in this study and to Ann-Charlotte at Camfil AB for performing the challenge measurements. We are also grateful to Dr. Alfonso E. Garcia-Bennet and Dr. Rambabu Atluri at the Ångström Laboratory, Uppsala University for providing the adsorption instrument and for the open research atmosphere and fruitful discussions.


  1. Ahmed, M.S., Attia, Y.A.: Multi-metal oxide aerogel for capture of pollution gases from air. Appl. Therm. Eng. 18, 787–797 (1998) CrossRefGoogle Scholar
  2. Ashrae Standard I45.I Laboratory Test Method for Assessing the Performance of Gas-Phase Air-Cleaning Systems: Loose Granular Media (2008) Google Scholar
  3. Bonneviot, L., Beland, F., Danumah, C., Giasson, S., Kaliaguine, S.: Mesoporous Molecular Sieves: Proceedings of the First International Symposium. Studies in Surface Science and Catalysis, vol. 117, pp. 143–154 (1998) CrossRefGoogle Scholar
  4. Brew, D.R.M., Glasser, F.P.: Synthesis and characterisation of magnesium silicate hydrate gels. Cem. Concr. Res. 35, 85–98 (2005) CrossRefGoogle Scholar
  5. Ciesielczyk, F., Krysztafkiewicz, A., Jesionowski, T.: Physicochemical studies on precipitated magnesium silicates. J. Mater. Sci. 42, 3831–3840 (2007) CrossRefGoogle Scholar
  6. Finlayson-Pitts, B.J., Pitts, J.N.: Atmospheric Chemistry: Fundamentals and Experimental Techniques. Wiley, New York (1986) Google Scholar
  7. Horvath, G., Kawazoe, K.: Method for the calculation of effective pore size distribution in molecular sieve carbon. J. Chem. Eng. Jpn. 16, 470 (1983) CrossRefGoogle Scholar
  8. Hsu, Y.M., Kollett, J., Wysocki, K., Wu, C.Y., Lundgren, D.A., Birky, B.K.: Positive artifact sulfate formation from SO2 adsorption in the silica gel sample used in NIOSH method 7903. Environ. Sci. Technol. 41, 6205–6209 (2007) CrossRefGoogle Scholar
  9. Iler, R.K.: The Chemistry of Silica, Solubility, Polymerization, Colloid and Surface Properties, and Biochemistry, pp. 558–559. Wiley, New York (1979) Google Scholar
  10. Jennings, M.H., Bullard, J.W., Thomas, J.J., Andrade, J.E., Chen, J.J., Scherer, G.W.: Characterization and modeling of pores and surfaces in cement paste: correlations to processing and properties. J. Adv. Concr. Technol. 6(1), 5–29 (2008) CrossRefGoogle Scholar
  11. John, D., McCarthy, J.F., Samet, J.M.: Indoor Air Quality Handbook. McGraw-Hill, New York (2000) pp. 271 Google Scholar
  12. Kruk, M., Jaroniec, M.: Adsorption study of surface and structural properties of MCM-41 materials of different pore sizes. J. Phys. Chem. B 101, 583–589 (1997) CrossRefGoogle Scholar
  13. Larsen, G., Lotero, E., Marquez, M.: Amine dendrimers as templates for amorphous silicas. J. Phys. Chem. B 104, 4840–4843 (2000) CrossRefGoogle Scholar
  14. Lin, R.B., Shin-Min, S., Chiung-Fang, L.: Characteristics and reactivities of Ca(OH)2/silica fume sorbents for low-temperature flue gas desulfurization. Chem. Eng. Sci. 58, 3659–3668 (2003) CrossRefGoogle Scholar
  15. Lu, G.Q.: Nanoporous Materials: Science and Engineering. Imperial College Press, London (2004) pp. 874 Google Scholar
  16. Odler, I.: The BET-specific surface area of hydrated Portland cement and related materials. Cem. Concr. Res. 33, 2049–2056 (2003) CrossRefGoogle Scholar
  17. Pierre, A.C., Pajonk, G.M.: Chemistry of aerogels and their applications. Chem. Rev. 102, 4243–4265 (2002) CrossRefGoogle Scholar
  18. Renedo, M., Fernández, J.J.: Preparation, characterization, and calcium utilization of fly ash/Ca(OH)2 sorbents for dry desulfurization at low temperature. Ind. Eng. Chem. Res. 41, 2412–2417 (2002) CrossRefGoogle Scholar
  19. Rouquerol, F., Rouquerol, J., Sing, K.: Adsorption by Powders & Porous Solids Principles, Methodology and Applications, pp. 176–205, 362–370. Academic Press, San Diego (1996) Google Scholar
  20. Rodriguez, J., Jirsak, T., Freitag, A., Larese, J.: Interaction of SO2 with MgO (100) and Cu/MgO (100): decomposition reactions and the formation of SO3 and SO4. J. Phys. Chem. B 104, 7439–7448 (2000) CrossRefGoogle Scholar
  21. Ryoo, R., Kim, J.M., Ko, C.H., Shin, C.H.: Disordered molecular sieve with branched mesoporous channel network. J. Phys. Chem. 100, 17718–17721 (1996) CrossRefGoogle Scholar
  22. Schweitzer, P.A.: Handbook of Separation Techniques for Chemical Engineers. McGraw-Hill, New York (1979) pp. 238 Google Scholar
  23. Sun, F., Gao, J., Zhu, Y., Qin, Y.: Mechanism of SO2 adsorption and desorption on commercial activated coke. Korean J. Chem. Eng. 28(7), 1025–1031 (2011) Google Scholar
  24. Taspinar, O.O., Ozgul-Yucel, S.: Lipid adsorption capacities of magnesium silicate and activated carbon prepared from the same rice hull. Eur. J. Lipid Sci. Technol. 110, 742–746 (2008) CrossRefGoogle Scholar
  25. Yang, R.T.: Sorbents: Fundamental and Applications, pp. 3–7. Wiley, Hoboken (2003) CrossRefGoogle Scholar
  26. Zheng, F., Addleman, R.S., Aardahl, L.C., Fryxell, G.E., Brown, D.R., Zemanian, T.S.: In: Fryxell, G.E., Guozhong, C. (eds.) Environmental Applications of Nanomaterials: Synthesis, Sorbents and Sensors, pp. 285–306. Imperial College Press, London (2007) CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  • Ebenezer Twumasi Afriyie
    • 1
  • Peter Norberg
    • 1
  • Christer Sjöström
    • 1
  • Mikael Forslund
    • 1
  1. 1.Materials Technology, KTH Research SchoolUniversity of GävleGävleSweden

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