Journal of Porous Materials

, Volume 18, Issue 4, pp 501–508 | Cite as

Permeability of silica monoliths containing micro- and nano-pores

  • Paul D. I. Fletcher
  • Stephen J. Haswell
  • Ping He
  • Stephen M. Kelly
  • Andrew Mansfield


For applications as catalyst supports in flow reactors, porous silica monoliths require a combination of connected pores of micron-scale to enable fluid flow plus nm-scale pores to enable high catalyst area and activity. We have synthesised a range porous silica monoliths, characterised their micron and nm-scale pores and measured their permeability coefficients K. K can be controlled over the range 10−10–10−14 m2, primarily by adjustment of the polymer/silane concentration ratio, whilst maintaining the specific surface area and nm-scale porosity approximately constant. For the majority of the silica monolith samples, the measured permeability coefficient K is 2–5 times smaller than K for a hypothetical reference system consisting of a monolith with uniform cylindrical pores aligned in the flow direction and with the same average pore diameter and volume fraction.


Silica Porous Monolith Permeability 



We thank Pfizer and the Engineering & Physical Sciences Research Council of the UK for funding this research.


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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Paul D. I. Fletcher
    • 1
  • Stephen J. Haswell
    • 1
  • Ping He
    • 1
  • Stephen M. Kelly
    • 1
  • Andrew Mansfield
    • 2
  1. 1.Department of ChemistryUniversity of HullHullUK
  2. 2.Pfizer Global Research & DevelopmentSandwich, KentUK

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