In this paper, we studied the process of hydrolysis of magnesium hydride with water vapor Received 4 July 2019 and considered the possibility of creating a chemical source of hydrogen based on this Received in revised form process. To study the hydrolysis reaction of magnesium hydride powder at temperatures 23 August 2019 above 100 degrees C, an experimental setup with a quartz tube - a reactor 300 mm long - was Accepted 12 September 2019 designed. The mass and volume of a single powder load in a quartz reactor was 65 g and Available online 13 October 2019 130 +/- 2 cm(3), respectively. The length of the powder zone along the axis of the reactor was approximately 10 cm. Based on the data obtained during the experiment, it can be distinguished that the Hydrogen source length of the reaction zone is greatest at the beginning and at the end of the hydrolysis Magnesium process and is approximately 5-6 cm. In the middle of the hydrolysis process, for the time Magnesium hydride interval from 3000 to 5000 s, the reaction zone is the smallest - about 4-5 cm. The proposed Hydrolysis design of the hydrolysis reactor and the experimental setup also made it possible to study Water vapor the peculiarities of the hydrolysis of magnesium hydride powder with water vapor; magnesium, the composition of the reaction products and the controllability of the generation of a stream of hydrogen. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.