Studying Zeolitic Diffusion by Interference and IR Microscopy

• Applicant: Professor Dr. Jörg Kärger
• Subject Area: Physical Chemistry of Solids and Surfaces, Material Characterisation
• Term: from 2003 to 2012
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 5407660

Interference and IR microscopy are so far the only two techniques, which allow the direct observation of the evolution of concentration profiles in the interior of zeolite crystals. In the present project they are applied for the investigation of intracrystalline transport diffusion in a series of zeolitic adsorbate-adsorbent systems. The observed transport properties are compared with the results of the diffusion measurements of the identical systems by the other techniques of the consortium. These investigations shall be accompanied by methodological developments of the techniques. They focus on a further enhancement of space and time resolution and sensitivity, as well as on an extension of the temperature range of the measurements.

• DFG Programme: Research Grants