NOVELTY - Hydrogen supply system for fuel cell comprises: a fuel chamber for storing a liquid fuel which includes a hydrogen containing organic compound; a dehydrogenation apparatus for dehydrogenating the fuel to form hydrogen gas and a by-product; a gas-liquid separation apparatus for separating hydrogen gas from the by-product; and a recovery chamber for recovering and storing the by-product.    USE - Fuel cell system is used in vehicles, household appliances, and ship and land equipment.    ADVANTAGE - The hydrogen supply system is relatively small, can supply pure hydrogen to the fuel cell, and discharges almost no carbon dioxide gas.    DETAILED DESCRIPTION - Hydrogen supply system (FCS) for supplying hydrogen to a fuel cell comprises:    (a) a fuel chamber (13) for storing a liquid fuel, which includes a hydrogen containing organic compound;    (b) a dehydrogenation apparatus (24) for dehydrogenating the fuel to form hydrogen gas and a by-product;    (c) a gas-liquid separation apparatus (20, 27, 32, 33, 34) for separating the hydrogen gas from the by-product by liquefying the by-product and for supplying the separated hydrogen gas to the fuel cell; and    (d) a recovery chamber (14) for recovering and storing the by-product liquefied in the gas-liquid separation apparatus.    INDEPENDENT CLAIMS are also included for the following:    (i) a method for recycling a fuel used in a hydrogen supply system for use in a fuel cell;    (ii) a refueling equipment for storing a fuel used in a hydrogen supply system for use in a fuel cell; and    (iii) a system for recycling a fuel for use in a fuel cell.    DESCRIPTION OF DRAWING(S) - The diagram illustrates a schematic circuit diagram of a fuel cell system.    Hydrogen supply system (FCS)    Container (10)    Movable partition (12)    Fuel cell chamber (13)    Recovery chamber (14)    Dehydrogenation apparatus (24)    Gas-liquid separation apparatus (20, 27, 32, 33, 34)    Heat exhauster (26., 30)    Heat pump system (HP)