Properties of activated MgH2 + mischmetal nanostructured composite produced by ball-milling
| Autor: | Mahdi Pourabdoli, Shahram Raygan, Hossein Abdizadeh, Seyyed Hamed Mirghaderi, Mohammad Amin Rahmaninasab |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Magnesium hydride lcsh:TJ807-830 lcsh:Renewable energy sources chemistry.chemical_element 02 engineering and technology Mischmetal Catalysis Hydrogen storage chemistry.chemical_compound Desorption 0502 economics and business Materials Chemistry lcsh:TJ163.26-163.5 050207 economics Ball mill Milling Renewable Energy Sustainability and the Environment Hydride 05 social sciences 021001 nanoscience & nanotechnology Electronic Optical and Magnetic Materials Cerium Fuel Technology lcsh:Energy conservation chemistry Catalyst 0210 nano-technology Nuclear chemistry |
| Zdroj: | Materials for Renewable and Sustainable Energy, Vol 7, Iss 3, Pp 1-11 (2018) |
| ISSN: | 2194-1467 2194-1459 |
| DOI: | 10.1007/s40243-018-0122-z |
| Popis: | MgH2 + mischmetal nanostructured composite was synthesized from MgH2 plus 6 and 10 wt% of mischmetal by ball-milling at various times. XRD studies revealed that cerium hydride was produced during the milling in all samples. Sievert test results indicated that the samples containing 6 wt% of mischmetal showed a higher desorption compared with the ones containing 10 wt% of mischmetal. The high amount of cerium hydride in the samples may be the reason, while hydrogen desorption properties decreased by adding more catalyst. Furthermore, BET results showed that the addition of the catalyst to the samples resulted in agglomerate formation in shorter milling times. The agglomerate formation increased with adding more amounts of mischmetal, thus decreasing the hydrogen desorption properties of the composite. The best results were obtained from the 30 h-milled sample containing 6 wt% of catalyst. The on-set desorption temperature of this sample was 100 °C lower than that of as-received MgH2. |
| Databáze: | OpenAIRE |
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