Single-File Diffusion in Zeolites

作者: Jörg Kärger

DOI: 10.1007/3829_2007_018

关键词: Anomalous diffusionAmorphous solidHeterogeneous catalysisChemical physicsDiffusion (business)Square rootCrystalMaterials scienceMolecular diffusionRandom walk

摘要: The exclusion of the mutual passage diffusants in zeolites with one-dimensional channels leads to patterns molecular transportation which are unknown amorphous materials or from multi-dimensional pore networks. In particular, there is no possibility describe transport by well-known Fick's equations diffusion. Molecular such systems has been termed single-file It characterized mean square displacements, infinitely extended diffusion found increase proportion root observation time rather than itself. For finite systems, rate exchange between crystals and their surroundings, representing one key parameters for practical application heterogeneous catalysis mass separation, decreases third second power crystal size.

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