Investigation of Molecular Mean Free Path, Molecular Kinetic Energy, and Molecular Polarity Affecting Knudsen Diffusivity along Pore Channels

The effective purification of corrosive gases at the cathode air stream side is essential for proton exchange membrane fuel cells’ performance in real-world applications. Gas molecular diffusion depth along pore channel a sufficient parameter that determines effectiveness porous media. collision between gas molecules and surfaces crucial determinant depth. An analytical model was developed to predict channels. Two different crystal sizes UiO-66 were synthesized validate against result empirically determine depths. parametric effects mean free path, kinetic energy, polarity on diffusivity assessed. A smaller path greater energy favorable larger depth, owing fewer collisions enhanced bounces after collisions. Greater led shorter due van der Waals force surfaces.