SEARCH Articles Figures Tables Measurement Technique for Permeation Coefficient of Gases Permeate gas Permeation of Gases through a Porous Slug Permeation of gases, water vapor and volatile organic compounds Permeation of permanent gases Permeation of simple gases Phenomenological Description of Single Gas Permeation Qualitative description of gas permeation Quantitative description of gas permeation and separation The Pore Radius and Tortuosity of a Porous Membrane for Gas Permeation