Transpiration Fuel Gas Adsorbent and Process for Producing the Same

摘要

A high-density evaporated fuel gas adsorbent and process for forming such capable of preventing temperature rise and temperature fall caused with adsorption and desorption of an evaporated fuel gas, capable of stably maintaining adsorbing and desorbing properties of the adsorbent, and capable of preventing a heat storage component from leaking out therefrom. The adsorbent is formed by mixing together microcapsules in each of which a substance that absorbs or releases heat in response to phase change is encased and activated carbon in which pore volume in an average pore diameter of 50 nm to 1000 nm is 0.3 mL/g or more and in which half-value width of a D-band peak in the vicinity of 1360 cm^-1 and half-value width of a G-band peak in the vicinity of 1580 cm^-1 are both equal to 100 cm^-1 or more in a Raman spectroscopic analysis, and by molding these integrally.