Diffusion in sphere and spherical-cavity arrays with interacting gas and surface phases

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• 作者：Marziye Mirbagheri ; Reghan J. Hill ; ^{reghan.hill@mcgill.ca}
• 关键词：Surface diffusion ; Sorption ; Effective diffusivity ; Cavity arrays ; Sphere arrays
• 刊名：Chemical Engineering Science
• 出版年：2017
• 出版时间：16 March 2017
• 年：2017
• 卷：160
• 期：Complete
• 页码：419-427
• 全文大小：1423 K
• 卷排序：160

文摘

Surface- and void-diffusion are coupled in complex sphere and spherical-cavity array geometries. Hindered void diffusion in the Knudsen regime makes surface diffusion an important contribution to overall permeability. Surface diffusion is captured using thermodynamic, mobility, and kinetic exchange parameters. Surface tortuosity and specific surface area are reported over the full range of porosities, spanning solid and void percolation thresholds.