ACTIVE CARBON MOLDED BODY
An active carbon molded body that comprises a plurality of active carbon granules that are foiled from aggregates of active carbon particles. The active carbon granules include a fibrous granulation binder. A plurality of communicating holes are foamed in the active carbon molded body. A pore size distribution curve obtained for the active carbon molded body by a mercury intrusion has: a first peak that is from first pores that are famed between active carbon particles; and a second peak that is from second pores that are foamed between active carbon particles and is for a smaller pore size than the first peak. The present invention thereby provides an active carbon molded body that has high water purification capacity and has a filtration flow rate that is at least a prescribed value.
1 . An active carbon molded body comprising:
a plurality of active carbon granules each comprising an aggregation of active carbon particles
and a plurality of communicating pores in the active carbon molded body,
wherein the active carbon granule includes a fibrous binder,
the active carbon molded body exhibiting a pore diameter distribution curve determined by a mercury intrusion, the pore diameter distribution curve having a first peak derived from first pores formed among the plurality of active carbon granules and a second peak derived from second pores formed among the active carbon particles and the second pores are smaller than the first pores.
2 . The active carbon molded body according to claim 1 , wherein
a pore diameter ratio of the second pores to the first pores is 0.1 to 0.36.
3 . The active carbon molded body according to claim 2 , wherein
the pore diameter ratio of the second pores to the first pores is 0.16 to 0.28.
4 . The active carbon molded body according to claim 1 , wherein
a volume ratio of the second pores to the first pores is 0.33 to 0.91.
5 . The active carbon molded body according to claim 1 , having a density of 0.25 g/cc to 0.35 g/cc.
6 . The active carbon molded body according to claim 2 , wherein
a volume ratio of the second pores to the first pores is 0.33 to 0.91.
7 . The active carbon molded body according to claim 3 , wherein
a volume ratio of the second pores to the first pores is 0.33 to 0.91.
8 . The active carbon molded body according to claim 2 , wherein a density of the active carbon molded body is 0.25 g/cc to 0.35 g/cc.
9 . The active carbon molded body according to claim 3 , wherein a density of the active carbon molded body is 0.25 g/cc to 0.35 g/cc.
10 . The active carbon molded body according to claim 4 , wherein a density of the active carbon molded body is 0.25 g/cc to 0.35 g/cc.
11 . The active carbon molded body according to claim 1 , wherein the fibrous binder has a fiber diameter from 10 μm to 80 μm.
12 . The active carbon molded body according to claim 1 , wherein the active carbon particles has a median particle diameter D 1 of 40 μm or less.
13 . The active carbon molded body according to claim 1 , wherein the active carbon granules has a median particle diameter greater than 40 μm.
14 . The active carbon molded body according to claim 1 , wherein the active carbon granules has a median particle diameter greater is 2 mm or less.
15 . The active carbon molded body according to claim 1 , wherein the active carbon granules has a median particle diameter greater is 150 μm or less.
16 . The active carbon molded body according to claim 1 , wherein the active carbon granules have a granule diameter of 65.0 μm to 76.0 μm.
17 . The active carbon molded body according to claim 1 , wherein the active carbon particles have a particle diameter of 4.2 μm to 20.6 μm.
18 . A water purification cartridge, comprising the active carbon molded body according to claim 1 .