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Probing Interconnectivity in Hierarchical Microporous/Mesoporous Materials using Adsorption and Nuclear Magnetic Resonance Diffusion

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Academic year: 2021

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Figure  1.  (color online) Hexane adsorption isotherm at 298 K in Faujasite zeolite (black ○),  Al-MCM-41 (blue ○), and mesoporous FAU (red ○)
Figure  2.  Attenuation    of  the  spin  echo  signal  as  a  function  of  the  gradient  strength  g  measured  from  PFG  NMR  for  hexane  adsorbed  in  FAU  (top  left),  Al-MCM-41  (top  right),  mFAU (bottom left) and a mechanical mixture of FAU+A
Figure 3. Effective diffusivity D eff  as determined from PFG NMR for hexane adsorbed at 298  K  in  FAU,  Al-MCM-41,  mFAU  and  a  mechanical  mixture  of  FAU+Al-MCM-41
Figure  4.  Predicted  effective  diffusivities  D eff   for  the  different  models  considered  in  this  work:  fast  exchange,  serial  resistor  network,  and  effective  medium  theory

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