Abstract
We investigated the properties of sintered porous metal filter manufactured by space holder method and we obtained the following results. (1) The porous structure with large cell wall by space holder method had larger form coefficient before and after carbon particle loading and higher trapping efficiency than there-dimensional network structure with bar-shape skeleton. (2) Form coefficient before and after carbon particle loading, trapping efficiency and trapped carbon amount to start blocking became larger or higher as the mean diameter of voids got smaller. (3) The filter composed of 3 disk filters arrayed with small space had smaller form coefficient before and after carbon particle loading, higher trapping efficiency and larger trapped carbon amount to start blocking than 1-disk filter. (4) Corn-shape filter with large filtration area had much better properties than disk filter. (5) Collecting efficiency before blocking was constant independently of trapped carbon amount if the air velocity was constant and it became higher as the air velocity increased. These results indicate that the optimization of porous structure and filter form makes it possible to develop the high-performance sintered porous metal filter with low pressure drop and high trapping efficiency by space holder method.
