abstract |
PROBLEM TO BE SOLVED: To provide a hydrocarbon adsorbent having an improved hydrocarbon adsorbing ability. The hydrocarbon adsorbent according to the present invention contains a ZSM-5 zeolite containing copper, the Si / Al molar ratio of the ZSM-5 zeolite is 11.5 to 40, and the copper content is 1% by weight. It is 10% by weight. [Selection diagram] FIG. 14 |