Device having an activated carbon canister and motor vehicle having such a device

A motor vehicle having a device for temporary storage of gas containing hydrocarbons emitted by fuel in a fuel tank of the motor vehicle, wherein density of the gas containing hydrocarbons is greater than density of ambient air, the device comprising:

• a plurality of activated carbon canisters, each enclosing an activated carbon filter charged in a flow direction from bottom up to counter to the force of gravity;
• and
• connecting lines connected to the plurality of activated carbon canisters such that the plurality of activated carbon canisters are arranged in a cascade progression, wherein an outlet opening of a first activated carbon canister is, in each case, connected to an inlet opening of a further activated carbon canister,
• wherein, in each of the plurality of activated carbon canisters, the respective outlet opening is arranged higher than the inlet opening, and
• wherein an increased pressure difference required for the gas containing hydrocarbons to overcome height differences resulting from positioning of the inlets and outlets in the cascaded arrangement prevents escape of the gas containing hydrocarbons as a result of the relative density of the gas containing hydrocarbons in comparison to ambient air such that the device collects the gas containing hydrocarbons in lowest regions of the plurality of activated carbon canisters by the force of gravity.