Effect of powder characteristics for a magnesium based metal hydride store |
| |
| Authors: | Christopher M.J. Bennett Andrew J. Patman Chiara Milanese Carol N. Eastwick Gavin S. Walker |
| |
| Affiliation: | 1. Energy and Sustainability Research Division, Faculty of Engineering, University of Nottingham, University Park, Nottingham NG7 2RD, UK;2. Materials, Mechanics and Structures Research Division, Faculty of Engineering, University of Nottingham, University Park, Nottingham NG7 2RD, UK;3. Pavia Hydrogen Lab, C.S.G.I. & Chemistry Department, Physical Chemistry Section, Viale Taramelli, 16, I-27100 Pavia, Italy |
| |
| Abstract: | The particle size and shape of commercially available MgH2 have been characterised, together with those of ball milled MgH2. These parameters have then been compared with those obtained for the hydrogenated and dehydrogenated state. In addition, thermal conductivity measurements of each specimen have been made. The results show that significant changes occur upon dehydrogenation, which are contrary to expectation. These changes include an increase in average particle size of 28% post dehydrogenation for as received MgH2, rather than the theorised decrease, and an increase of approximately 300% post dehydrogenation in the ball milled MgH2 sample. The change in thermal conductivity between the two material states is also higher than expected with an average variation of 14% between the samples in the hydrogenated and dehydrogenated states. |
| |
| Keywords: | Hydrogen storage Magnesium Powder characterisation Thermal conductivity |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
