| abstract |
[Problem] The subject of the present invention is to provide a new type of adsorbent suitable for carbon canisters mounted on automobiles. [Solution] The activated carbon fiber board of the present invention satisfies one or more of the requirements of various indexes such as specific surface area, pore volume with a predetermined pore diameter, and board density. For example, as an embodiment, the specific surface area of the activated carbon fiber board is 1400-2300 m 2 /g, the pore volume of the pores with a pore diameter of more than 0.7 nm and less than 2.0 nm is 0.20 to 0.70 cm 3 /g, and the pore diameter is 0.20 to 0.70 cm 3 /g. The ratio of the pore volume of pores below 0.7 nm to the pore volume of pores below 2.0 nm, R 0.7/2.0 is 5% or more and less than 25%, and the plate density is 0.020～0.200 g /cm 3 . |