TECHNOLOGY FOCUS - CHEMICAL ENGINEERING - Preferred Conditions: When fuel solution comprises 9% w/w of at least one complex hydride, the solution is added to the reactor fuel at a rate of between 1.6 ml/minute and 10 ml/minute; or when fuel solution comprising 19% w/w of at least one complex hydride, the solution is added to the reactor fuel at a rate of between 0.8 ml/minute and 5 ml/minute. When the fuel addition of the solution is carried out at a rate of between 1.6 ml/minute and 10 ml/minute, the catalytic hydrolysis is conducted at a temperature between 78.6 degrees C and 85.2 degrees C; or when the fuel addition of the solution is carried out at a rate of between 0.8 ml/minute and 5 ml/minute, the catalytic hydrolysis is conducted at a temperature between 82.4 degrees C and 103.9 degrees C. Preferred Component: The complex hydride is sodium borohydride. Preferred Composition: The hydroxide is sodium hydroxide at a rate of 4.5 wt.% of the solution. Preferred Process: In the controlled production of continuous flow of hydrogen, the reactor operates without external cooling. The steel monolith has been previously obtained from a process comprising at least one stage of machining and heat treatment to enhance subsequent adhesion of the catalyst. Heat treatment comprises treatment at 900 degrees C for 2 hours. The process further involves an in situ reactivation process of the cobalt catalyst and supported on the boron steel monolith. In situ reactivation process involves carrying out a first addition of fuel on the catalyst solution in a continuous pre-added fuel solution. Once the boron and cobalt catalyst has lost its activity, the process further involves a process of ex-situ catalyst reactivation, where ex situ reactivation process involves adding a diluted acid on the catalyst, where the diluted acid is hydrochloric acid. After the ex situ reactivation, the reactivated catalyst is reused in the process. Preferred Device: The device further comprises dispensing unit of hydrogen stream at fuel cell. The continuous reactor comprises a cylindrical body; a cover with opening and closing parts for regulating the supply of fuel solution; and an output device of the hydrogen stream and the products of hydrolysis. It also comprises at least one thermocouple. It is constructed with a lightweight material that is transparent polymethylmethacrylate. EXAMPLE - No suitable example given.