NOVELTY - A filter (100) to remove moisture carried in a gas, comprises a frame (110) having an opening formed in each of two sides; a cover (130) coupled to the opening and having at least one hole to allow the gas to pass; and a desiccant (120) filled inside the frame and configured to absorb the moisture.    USE - As a filter to remove moisture carried in a gas useful in hydrogen generator for fuel cell power generation system for producing electrical energy (claimed) and for generating power.    ADVANTAGE - By using the filter, the backflow of electrolyte solution, which can occur while generating hydrogen, can be prevented, by passing the hydrogen through a desiccant filled inside a frame, to consequently increase the hydrogen generating efficiency of the hydrogen generator. The filter useful in fuel cell system, which produces electrical energy in a stable manner by removing the moisture carried in the gas using a desiccant supported by the frame and covers, to prevent the electrolyte solution in the electrolyte bath from flowing backward with the generated hydrogen.    DETAILED DESCRIPTION - A filter (100) to remove moisture carried in a gas, comprises a frame (110) having an opening formed in each of two sides; a cover (130) coupled to the opening and having at least one hole to allow the gas to pass; and a desiccant (120) filled inside the frame and configured to absorb the moisture. The desiccant comprises several porous grains. The desiccant comprises an aerogel. The size of the hole is smaller than a size of the porous grains. The filter further comprises a detour plate (140) inserted in the desiccant and configured to detour a movement path of the gas. INDEPENDENT CLAIMS are included for the following:    (1) a hydrogen generator configured to dissociate an electrolyte solution to generate hydrogen, comprising an electrolyte bath containing the electrolyte solution; an anode coupled to an inside of the electrolyte bath and configured to generate electrons; a cathode coupled to an inside of the electrolyte bath and configured to receive the electrons from the anode to generate hydrogen; and the filter; and    (2) a fuel cell power generation system configured to produce electrical energy using hydrogen generated by dissociating an electrolyte solution, comprising the hydrogen generator and a fuel cell configured to convert a chemical energy of the hydrogen produced at the cathode to produce the electrical energy.    DESCRIPTION OF DRAWING(S) - The figure shows a perspective view of the filter.    Filter (100)    Frame (110)    Desiccant (120)    Cover (130)    Holes (132)    Detour plate (140)