| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1619579 | Journal of Alloys and Compounds | 2011 | 4 Pages |
A process for the industrial production of magnesium hydride (MgH2) based on a thermal equilibrium method and its application to portable hydrogen sources is proposed. Mg powders and tablets compressed with mechanically ground Mg ribbons were successfully hydrogenated in a 50-kg-batch furnace. The resultant MgH2 showed a hydrogen yield of around 96% with good reproducibility. The compression ratio of Mg tablets was found to be an important factor in the hydrogenation yield. A hydrolysis technique using citric acid as an additive was employed to generate hydrogen under 373 K. Increasing the concentration of citric acid and the temperature accelerated the hydrolysis reactivity. A hydrogen reactor utilizing hydraulic head pressure was developed. It generated hydrogen continuously for 1 h at a flow rate of 100 ml min−1 with hydrolysis of 5 g of tablet-form MgH2. The conversion yield was around 70%, regardless of the flow rate.
Research highlights▶ Tablet and powder Mg were hydrogenated in a 50 kg batch furnace based on thermal equilibrium method. ▶ Compression of Mg tablet improved the hydrogenation yield. ▶ Hydrolysis of MgH2 using citric acid generated hydrogen under 373 K. ▶ A MgH2-hydrogen reactor utilizing hydraulic head pressure was developed. ▶
