Thermo-electrochemical conversion apparatus

A thermoelectric conversion apparatus (100) having a high thermoelectric conversion efficiency comprises: a dehydrogenation reactor for generating hydrogen and acetone by an endothermic dehydrogenation reaction of isopropyl alcohol in the presence of a dehydrogenation catalyst and heat from a heat source, such as from the cooling circuit (3) of a main fuel cell, and a sub-fuel cell (5) which generates electricity by an electrochemical reaction of the hydrogen and the acetone produced by the dehydrogenation reactor. A module is constructed by integrating the dehydrogenation reactor (4) and an electricity generating layer constituting the fuel cell (5) into a stack. Self-generated heat of the sub-fuel cell (5) is thus not lost but effectively enhances the endothermic dehydrogenation reaction.