DEHYDROGENATION REACTION SYSTEM AND CONTROL METHOD THEREOF

An apparatus of a fuel cell system may comprise a dehydrogenation reactor configured to generate hydrogen gas based on a chemical reaction of a chemical hydride and an aqueous acid solution, an acid aqueous solution tank configured to supply the acid aqueous solution to the dehydrogenation reactor, a chemical hydride tank configured to supply the chemical hydride to the dehydrogenation reactor, a hydrogen tank configured to store the hydrogen gas under a first pressure, a hydrogen back pressure regulator along a hydrogen discharge path, a product tank configured to store a product generated in the dehydrogenation reactor, a processor, and a memory storing at least one instruction to control a pressure of the dehydrogenation reactor to maintain a reference pressure by supplying an acid aqueous solution or water before product discharge.