A fuel tank

A fuel tank (1) having an enclosure (2) which encloses two chambers (4,5), the first of which (4) is adapted to receive the fuel and the second of which (5) contains the granular material (22) adapted to adsorb organic substances in a reversible manner; the second chamber (5) being connected to the first chamber (4), so as to collect temporarily the fuel vapour via a duct (25), to the outside environment via a first connector (26) and to a suction means (28) via a second connector (27); and the suction means (28) aspirating the adsorbed fuel and, therefore, returning air through the first connector (26) so as to regenerate the granular material (22).