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Simulation of nonwetting phase entrapment within porous media using magnetic resonance imaging.
Watt-Smith, Matthew J; Rigby, Sean P; Chudek, John A; Fletcher, Robin S.
Afiliação
  • Watt-Smith MJ; Department of Chemical Engineering, University of Bath, Claverton Down, Bath BA2 7AY, UK.
Langmuir ; 22(11): 5180-8, 2006 May 23.
Article em En | MEDLINE | ID: mdl-16700611
ABSTRACT
Models representing the pore structures of amorphous, mesoporous silica pellets have been constructed using magnetic resonance images of the materials. Using magnetic resonance imaging (MRI), maps of the macroscopic (approximately 0.01-1 mm) spatial distribution of porosity and pore size were obtained. The nature and key parameters of the physical mechanism for mercury retraction, during porosimetry experiments on the silica materials, were determined using integrated gas sorption experiments. Subsequent simulations of mercury porosimetry within the structural models derived from MRI have been used to successfully predict, a priori, the point of the onset of structural hysteresis and the final levels of mercury entrapment for the silicas. Hence, a firm understanding of the physical processes of mercury retraction and entrapment in these amorphous silica materials has been established.
Assuntos
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Base de dados: MEDLINE Assunto principal: Simulação por Computador / Imageamento por Ressonância Magnética Idioma: En Ano de publicação: 2006 Tipo de documento: Article
Buscar no Google
Base de dados: MEDLINE Assunto principal: Simulação por Computador / Imageamento por Ressonância Magnética Idioma: En Ano de publicação: 2006 Tipo de documento: Article