Magnesium hydride based hydrogen chemical source: Development and application perspectives

• Published in: International journal of hydrogen energy Vol. 44; no. 54; pp. 28578 - 28585
• Main Authors: Potapov, S.N., Gvozdkov, I.A., Belyaev, V.A., Verbetsky, V.N., Mitrokhin, S.V.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 05.11.2019
• Subjects: Hydrogen source; Hydrolysis; Magnesium; Magnesium hydride; Water vapor; Hydrolysis; Hydrogen source; Magnesium hydride; Magnesium; Water vapor
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2019.09.094

In this paper, we studied the process of hydrolysis of magnesium hydride with water vapor and considered the possibility of creating a chemical source of hydrogen based on this process. To study the hydrolysis reaction of magnesium hydride powder at temperatures above 100 °C, an experimental setup with a quartz tube — a reactor 300 mm long — was designed. The mass and volume of a single powder load in a quartz reactor was 65 g and 130 ± 2 cm3, 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 length of the reaction zone is greatest at the beginning and at the end of the hydrolysis process and is approximately 5–6 cm. In the middle of the hydrolysis process, for the time interval from 3000 to 5000 s, the reaction zone is the smallest - about 4–5 cm. The proposed design of the hydrolysis reactor and the experimental setup also made it possible to study 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. •The process of hydrolysis of magnesium hydride with water vapor was studied.•The peculiarities of the hydrolysis of magnesium hydride powder with water vapor were stated.•The possibility of creating a chemical source of hydrogen based on this process was considered.