Evolution of catalyst coated atomised magnesium spheres: an alternative thermal storage medium for concentrated solar power applications
Elevated temperature cycling studies were performed on two commercial gas atomised Mg spherical powders (average diameter of 26 μm and 30 μm) with magnetron sputtered catalysts (chromium, iron, vanadium and stainless steel) applied to their surfaces. At 350 °C, the presence of a catalyst promotes fa...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Published: |
Elsevier
2017
|
| Subjects: | |
| Online Access: | https://eprints.nottingham.ac.uk/47531/ |
| _version_ | 1848797569004601344 |
|---|---|
| author | Mistry, Priyen C. Grant, David M. Stuart, Alastair D. Manickam, Kandavel Walker, Gavin S. |
| author_facet | Mistry, Priyen C. Grant, David M. Stuart, Alastair D. Manickam, Kandavel Walker, Gavin S. |
| author_sort | Mistry, Priyen C. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Elevated temperature cycling studies were performed on two commercial gas atomised Mg spherical powders (average diameter of 26 μm and 30 μm) with magnetron sputtered catalysts (chromium, iron, vanadium and stainless steel) applied to their surfaces. At 350 °C, the presence of a catalyst promotes faster reaction kinetics with improving capacity until approaching stabilisation by the 90th cycle, e.g. the normalised capacity of V_Mg30 was found to rise from 45.5% to 65.5%. Following determination of activation energies (from Kissinger plots) and microstructural analysis of the post cycled structures a mechanism was proposed for the differing evolutions of the uncoated and coated Mg powders based upon a complex process in which particle sintering competes with particle fragmentation. Catalyst effectiveness varied with temperature, having a negligible impact on hydrogen storage characteristics of the atomised Mg powders following 50 cycles at 400 °C and this was mainly associated with the lack of multivalency in the catalysts. |
| first_indexed | 2025-11-14T20:05:57Z |
| format | Article |
| id | nottingham-47531 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T20:05:57Z |
| publishDate | 2017 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-475312020-05-04T19:13:19Z https://eprints.nottingham.ac.uk/47531/ Evolution of catalyst coated atomised magnesium spheres: an alternative thermal storage medium for concentrated solar power applications Mistry, Priyen C. Grant, David M. Stuart, Alastair D. Manickam, Kandavel Walker, Gavin S. Elevated temperature cycling studies were performed on two commercial gas atomised Mg spherical powders (average diameter of 26 μm and 30 μm) with magnetron sputtered catalysts (chromium, iron, vanadium and stainless steel) applied to their surfaces. At 350 °C, the presence of a catalyst promotes faster reaction kinetics with improving capacity until approaching stabilisation by the 90th cycle, e.g. the normalised capacity of V_Mg30 was found to rise from 45.5% to 65.5%. Following determination of activation energies (from Kissinger plots) and microstructural analysis of the post cycled structures a mechanism was proposed for the differing evolutions of the uncoated and coated Mg powders based upon a complex process in which particle sintering competes with particle fragmentation. Catalyst effectiveness varied with temperature, having a negligible impact on hydrogen storage characteristics of the atomised Mg powders following 50 cycles at 400 °C and this was mainly associated with the lack of multivalency in the catalysts. Elsevier 2017-10-20 Article PeerReviewed Mistry, Priyen C., Grant, David M., Stuart, Alastair D., Manickam, Kandavel and Walker, Gavin S. (2017) Evolution of catalyst coated atomised magnesium spheres: an alternative thermal storage medium for concentrated solar power applications. International Journal of Hydrogen Energy, 42 (47). pp. 28453-28463. ISSN 0360-3199 Thermal storage; Catalysis; Atomised; Hydrogen; Magnesium; Magnetron sputtering http://www.sciencedirect.com/science/article/pii/S0360319917337564?via%3Dihub doi:10.1016/j.ijhydene.2017.09.095 doi:10.1016/j.ijhydene.2017.09.095 |
| spellingShingle | Thermal storage; Catalysis; Atomised; Hydrogen; Magnesium; Magnetron sputtering Mistry, Priyen C. Grant, David M. Stuart, Alastair D. Manickam, Kandavel Walker, Gavin S. Evolution of catalyst coated atomised magnesium spheres: an alternative thermal storage medium for concentrated solar power applications |
| title | Evolution of catalyst coated atomised magnesium spheres: an alternative thermal storage medium for concentrated solar power applications |
| title_full | Evolution of catalyst coated atomised magnesium spheres: an alternative thermal storage medium for concentrated solar power applications |
| title_fullStr | Evolution of catalyst coated atomised magnesium spheres: an alternative thermal storage medium for concentrated solar power applications |
| title_full_unstemmed | Evolution of catalyst coated atomised magnesium spheres: an alternative thermal storage medium for concentrated solar power applications |
| title_short | Evolution of catalyst coated atomised magnesium spheres: an alternative thermal storage medium for concentrated solar power applications |
| title_sort | evolution of catalyst coated atomised magnesium spheres: an alternative thermal storage medium for concentrated solar power applications |
| topic | Thermal storage; Catalysis; Atomised; Hydrogen; Magnesium; Magnetron sputtering |
| url | https://eprints.nottingham.ac.uk/47531/ https://eprints.nottingham.ac.uk/47531/ https://eprints.nottingham.ac.uk/47531/ |