Effects of Carbon-Supported Nickel Catalyst on Hydrogen Storage Properties of Magnesium Hydride
碩士 === 國立臺灣科技大學 === 機械工程系 === 105 === Magnesium hydride (MgH2) has a high hydrogen storage capacity (7.6 wt.%).However, its application is limited by high reaction temperature and slow reaction rate, which are results of stable sorption thermodynamics and slow kinetics.The kinetics can be improved b...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2017
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| Online Access: | http://ndltd.ncl.edu.tw/handle/e4n7q3 |
| Summary: | 碩士 === 國立臺灣科技大學 === 機械工程系 === 105 === Magnesium hydride (MgH2) has a high hydrogen storage capacity (7.6 wt.%).However, its application is limited by high reaction temperature and slow reaction rate, which are results of stable sorption thermodynamics and slow kinetics.The kinetics can be improved by adding different catalysts or additives. In this study, we investigated the effect of carbon-supported nickel catalyst (Ni/fiber) on hydrogen desorption of MgH2.The carbon-supported nickel catalyst was prepared by electroplating of Ni particles on PAN-based carbon fiber. SEM result showed that the best coating parameter is 1.5V-10min.The Ni/fiber was then mixed with MgH2 by mechanical milling to form the Mg-based hydrogen storage material(MgH2+Ni/fiber).The results showed that Ni/fiber can improve the kinetics of MgH2 ,and that the activation energy of MgH2+Ni/fiber(85.3 kJ/mol) is lower than that of MgH2(111.3 kJ/mol).MgH2+Ni/fiber can desorb 2.04 wt.%H2 within 10 min at 300 oC.
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