Abstract: The efficiency of dehydrogenation and that of hydrogenation are improved. A hydrogen generator for generating hydrogen by dehydrogenation of organic hydrides in the presence of a catalyst is characterized by comprising a reactor vessel (10) of a multi-tubular structure having a region (12) for supplying fuel to generate heat necessary for dehydrogenation, the region containing a combustion catalyst for combusting fuel, and a region (11) containing a dehydrogenation catalyst necessary for dehydrogenation, the regions being arranged radially side by side with a wall separating them.

Abstract: The efficiency of dehydrogenation and that of hydrogenation are improved. A hydrogen generator for generating hydrogen by dehydrogenation of organic hydrides in the presence of a catalyst is characterized by comprising a reactor vessel (10) of a multi-tubular structure having a region (12) for supplying fuel to generate heat necessary for dehydrogenation, the region containing a combustion catalyst for combusting fuel, and a region (11) containing a dehydrogenation catalyst necessary for dehydrogenation, the regions being arranged radially side by side with a wall separating them.

Abstract: It is intended to realize storage and transportation of large amounts of energy and to carry out storage or supply of energy in conformity with fluctuation of natural energy. There is provided an organic hydride synthesizing apparatus capable of hydrogenation reaction between an unsaturated hydrocarbon and hydrogen in the presence of a catalyst to thereby accomplish synthesis of an organic hydride, which organic hydride synthesizing apparatus comprises a catalyst, heating means (3a) for heating the catalyst, hydrogen supply rate detection means (25) for detecting the rate of hydrogen supply to the interior of the apparatus, and control means (31),(32),(33) for in accordance with the supply rate, controlling the rate of unsaturated hydrocarbon fed, the rate of product recycled and the temperature of the catalyst.