Activated carbon molded article
AssigneeKuraray Co., Ltd.
InventorsTakaharu Yamamoto, Mitsunori Nishita, Mitsunori Hitomi, Takayuki Yamada
Life of this patent
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Abstract
To provide an activated carbon molded article which can satisfactorily adsorb an evaporated fuel emitted from an automobile and can achieve low evaporated fuel emission performance during the long-time parking of an automobile. An activated carbon molded article having a specific surface area per volume, which is calculated from a specific surface area determined by the BET multipoint method and a packing density determined in accordance with JIS K 1474, of 290 to 520 m2/mL, and also having an outer surface area per volume of 1.4 m2/L or more.
Claims22
An activated carbon molded article, having
- a pillar structure,
- a specific surface area per volume, calculated from a specific surface area determined by a BET multipoint method and a packing density determined in accordance with JIS K 1474, in a range of from 290 to 520 m2/mL, and
- an outer surface area per volume in a range of from 1.4 m2/L or more,
- wherein the pillar structure has a pillar axis direction corresponding to a longest dimension of pillar structure,
- wherein the pillar structure comprises:
- (i) a pillar peripheral wall comprising, in an inside thereof, a first hollow part opening at a first end in the pillar axis direction and a second hollow part opening at a second end in the pillar axis direction;
- and (ii) a partition wall extending from the first to the second hollow part opening, to divide the hollow part into compartments, and
- wherein a void-to-wall ratio, of an area of a void space part to an area of a wall part in a pillar cross section, to which the pillar axis direction is orthogonal, is in a range of from 20 to 50%.
The article of claw 1, wherein the pillar structure comprises the partition wall, as a first partition wall and further comprises a second partition wall,
- wherein the partition walls are connected to the pillar peripheral wall, and
- wherein the partition walls are not connected to each other.
The article of class 1, wherein, in the pillar cross section, a difference between a thickness of the partition wall and a thickness of the pillar peripheral wall is 5% or less of a longest outer dimension a of the pillar cross section.
The article of claw 1, wherein cross-sectional shapes of the pillar structure observed in the pillar axis direction are identical to each other.
Dependencies are inferred from the claim text.