Adsorbent, canister and method for producing adsorbent

An adsorbent to be packed into a canister, the adsorbent at least comprising:

• activated carbon;
• and
• an additive material having a higher heat capacity than the activated carbon, the additive material being at least one of a phase change and a phase transition material to suppress temperature change in the activated carbon during purging of an adsorbed fuel,
• wherein the adsorbent has first pores that are derived from the activated carbon and are less than 100 nm and second pores that are derived from meltable cores and are 1 μm or more,
• wherein the adsorbent is in a form of a hollow molded body having an outer diameter of more than 6 mm and not more than 50 mm and in which respective parts have a thickness of not less than 0.2 mm and not more than 1 mm,
• wherein the adsorbent has a volumetric specific heat of 0.08 kcal/L·° C. or more,
• wherein the ratio of the volume of the second pores to the volume of the first pores is not less than 10% and not more than 200%, and
• wherein the additive material is a metal oxide.