Prediction of gas sorption kinetics for porous media using MRI

Matthew J Watt-Smith, Stan T Kolaczkowski, Sean P Rigby, John A Chudek

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Diffusion and reaction within porous media involving condensable vapors are important processes in catalysis, fuel cells, and membrane sepns. In this work, 3-D maps of the spatial variation of porosity, pore size and network tortuosity within a porous solid, derived from magnetic resonance images, have been used to construct a structural model for a mesoporous catalyst pellet. Simulations of the kinetic uptake, adsorption and capillary condensation of butane vapor within the porous solid, conducted on the structural model, have successfully predicted exptl. measurements of the effects of the onset of capillary condensation on mass transfer rates without the need of the various adjustable parameters prevalent in other models. These findings suggest that accurate math. models for both the complex void space of the porous medium, and the mass transport processes taking place within it, have been successfully developed. [on SciFinder (R)]
Original languageEnglish
Pages (from-to)3278-3289
Number of pages12
JournalAIChE Journal
Volume52
Issue number9
Publication statusPublished - 2006

Keywords

  • gas adsorption kinetics porous material MRI butane silica
  • Reaction kinetics (gas adsorption kinetics on porous media studied using MRI)
  • Adsorption
  • Porous materials
  • Imaging (NMR
  • gas adsorption kinetics on porous media studied using MRI)

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