chapter  2
42 Pages

2Studying Diffusion and Mass Transfer at the Microscale

ByChristian Chmelik, Douglas M. Ruthven, Jörg Kärger

PFG NMR Diffusivity Data .............................................66 2.3Results and Discussion ............................................................................... 69

2.3.1Zeolites .............................................................................................. 69 2.3.1.1Intracrystalline Diffusion: Zeolites Y and NaX ............ 69 2.3.1.2Transport Resistances at the Crystal Surface:

Zeolites NaCaA and Ferrierite ........................................ 70 2.3.1.3Mesoscopic Observation of Molecular Uptake:

Water in Sodalite ...............................................................72 2.3.1.4Long-Range Diffusion: Mass Transfer in Beds of

Zeolite NaX and in FCC Catalyst Particles .................... 73 2.3.2Metal Organic Frameworks ............................................................77