A study of the porosity of gas filtration cakes

The purpose of this work was to determine the porosity of gas filtration cakes composed of powdery organic and inorganic materials, employing a technique whereby an optical microscope generates images of the powdery layer deposited on the surface of the filtering medium. To this end, experimental cake filtration porosity data were obtained as a function of the surface filtration velocity. The images generated by the optical microscope were analyzed by using an image analyzing program that supplied the cake porosity values. The results revealed that porosity decreases as surface filtration velo...

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