Measurement of Porosity in Three-way Catalyst Particles Membrane Filter using Electron Microscopy Image Analysis

A membrane filter was fabricated using gas dispersant micro-sized Three-way Catalyst (TWC) particles on the conventional filter substrate. The porosity of the cross-sectional area of the TWC-membrane was measured through electron microscopy image processing technique. In the membrane manufacturing process, a parametric study was conducted by comparing three mean particle sizes under three superficial velocities. According to high resolution electron micrographs, the cross-sectional view of a single TWC-particle was revealed as a homogeneously agglomerated particle. The porosity of the cross-sectional area of the membrane was measured as approximately 64.4% with a slight difference about 3% depending on varying mean particle sizes and superficial velocities.