Abstract
The pore structure and permeability of an alumina-fiber-based hot gas filter membrane containing an acid phosphate binder were characterized using capillary flow porometry. The smallest pore diameter was 1.24 ± 0.06 μm; the largest pore diameter (bubble point pore diameter) was 23 ± 1 μm. The pore size distribution was narrow, with almost all pores ranging from 2 to 4 μm, and the mean flow pore size 2.6 ± 0.1 μm. The Darcy permeability constant for air through the membrane was (114 ± 6) × 10−9 cm2.
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