Experimental Investigation of the Effect of Pore Size Distribution on Nano-particle Capture Efficiency Within Ceramic Particulate Filters

The effect of the pore size distribution on size-resolved filtration efficiency was investigated for two ceramic particulate filters using matter (PM) generated by a spark-ignition direct-injection engine fueled with gasoline. cordierite filter tested had porosity 43%, median diameter 12 ?m, and wide lognormal standard deviation (??) 0.4. aluminum titanate very similar porosity, diameter, thickness, but significantly narrower (?? = 0.1). testing under identical experimental conditions enabled impact performance to be evaluated. Filtration experiments were performed focusing just wall, starting from clean until transition cake (filtration > 99%). Time-resolved particle measurements used evaluate progression estimate trapped mass within filter. filter, narrow distribution, exhibited better diffusion capture efficiency. negative higher flow velocity more pronounced distribution. Flow distributions measured capillary porometry develop cylindrical model understand differences in observed trends predicted larger superficial as seen experiments. results data demonstrate that bubble point width influence efficiencies thickness.