Journal of Sol-Gel Science and Technology

, Volume 48, Issue 1–2, pp 224–230 | Cite as

Reactivity of CO2 traps in aerogel–wollastonite composites

  • Alberto Santos
  • Mohamed Ajbary
  • José A. Toledo-Fernández
  • Víctor Morales-Flόrez
  • Abdelhak Kherbeche
  • Luis EsquiviasEmail author
Original Paper


Synthetic wollastonite has been used as the active phase embedded into two different silica aerogel composites. These composites are different in respect of the route used for the synthesis of the wollastonite powder. Texture and composition of both types of composite have been characterized. In addition, several factors (pH, reaction time, CO2 saturation, etc.) that could help to optimize the carbonation process at room temperature and pressure have been studied. Under the same conditions, both composites confirm previous results showing efficiencies as CO2 sequesters between 80% and 100% in only 15 min of gas flow. The textural characteristics of the aerogel, together with the grain size of the synthetic wollastonite powder, not only increase the speed of the reaction, but also inhibit the appearance of a passivating layer on the surface of the wollastonite grains attacked by the CO2. This is an outstanding feature as it insists on a cutting-edge challenge of the CO2 research: its economical availability.


Aerogel Wollastonite CO2 sequestration Passivating layer Carbonation Porous matrix 



The authors are grateful to the Consejería de Innovación Ciencia y Empresa of the Junta de Andalucía (Spain), Agencia Española de Cooperación Internacional and the Spanish Ministerio de Medio Ambiente, for supporting this work with the Projects TEP790, AECI A/5575/06 and A266/2007/3-11.1, respectively.


  1. 1.
    Seifritz W (1990) Nature 345:486CrossRefGoogle Scholar
  2. 2.
    Kojima T, Nagamine A, Ueno N, Uemiy S (1997) Energy Convers Manage 38:461CrossRefGoogle Scholar
  3. 3.
    Fernandez-Bastero S, Garcia T, Santos A, Gago-Duport L (2005) Ciencias Marinas 31:593Google Scholar
  4. 4.
    Huijgen JJW, Witkamp G-J, Comans NJ (2006) Chem Eng Sci 52:4242CrossRefGoogle Scholar
  5. 5.
    O'Connor WK, Dahlin DC, Rush GE, Dahlin CL, Collins WK (2002) Miner Metall Proc 19:95Google Scholar
  6. 6.
    Wu JC-S, Sheen J-D, Chen S-Y, Fan Y-Ch (2001) Ind Eng Chem Res 40:3902CrossRefGoogle Scholar
  7. 7.
    Tai CY, Chen W-R, Shih S-M (2006) AIChE J 52:292CrossRefGoogle Scholar
  8. 8.
    Béarat H, Mckelvy MJ, Chizmeshya AVG, Gormley D, Nunez R, Carpenter RW, Squires K, Wolf GH (2006) Environ Sci Technol 40:4802CrossRefGoogle Scholar
  9. 9.
    Santos A, Toledo-Fernández JA, Mendoza-Serna R, Gago-Duport L, de la Rosa-Fox N, Piñero M, Esquivias L (2007) Ind Eng Chem Res 46:103CrossRefGoogle Scholar
  10. 10.
    Santos A, Ajbary M, Kherbeche A, Piñero M, de la Rosa-Fox N, Esquivias L (2008) J Sol-Gel Sci Technol, Available on line. doi: 10.1007/s10971-007-1672-1
  11. 11.
    Esquivias L, Rodríguez-Ortega J, Barrera-Solano C, de la Rosa-Fox N, (1999) J Non-Cryst Solids 225:239CrossRefGoogle Scholar
  12. 12.
    Esquivias L, de la Rosa-Fox N (2003) J Sol-Gel Sci Technol 26:651CrossRefGoogle Scholar
  13. 13.
    Kistler SS (1931) Nature 127:741CrossRefGoogle Scholar
  14. 14.
    Zarzycki J, Prassas M, Phallipou J (1982) J Mater Sci 17:3371CrossRefGoogle Scholar
  15. 15.
    Nicolaon GA, Teichner SJ (1968) Bull Soc Chim Fr 1900Google Scholar

Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Alberto Santos
    • 1
  • Mohamed Ajbary
    • 2
  • José A. Toledo-Fernández
    • 2
  • Víctor Morales-Flόrez
    • 3
  • Abdelhak Kherbeche
    • 4
  • Luis Esquivias
    • 3
    Email author
  1. 1.Departamento de Ciencias de la TierraCASEM, Universidad de CádizCadizSpain
  2. 2.Departamento de Física de la Materia Condensada, Facultad de CienciasUniversidad de CádizCadizSpain
  3. 3.Departamento de Física de la Materia Condensada, Facultad de FísicaInstituto de Ciencias de Materiales de Sevilla (CSIC), Universidad de SevillaSevillaSpain
  4. 4.Université Sidi Mohamed Ben Abdellah, Ecole Supérieure de TechnologieFesMaroc

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