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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
Article

Abstract

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.

Keywords

Silica Porous Monolith Permeability 

Notes

Acknowledgments

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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