A comparative study of hydrogen generation by reaction of ball milled mixture of magnesium powder with two water-soluble salts (NaCl and KCl) in hot water |
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| Affiliation: | 1. Department of Mechanical Engineering Science, University of Johannesburg, Auckland Park Kingsway Campus, Johannesburg, 2006, South Africa;2. HySA Systems Competence Centre, South African Institute for Advanced Materials Chemistry (SAIAMC), University of the Western Cape, Bellville, South Africa;3. University of Johannesburg, Auckland Park Kingsway Campus, Johannesbur, 2006, South Africa;2. CNRS, ICMCB, UPR 9048, F-33600, Pessac, France;3. Univ. Bordeaux, ICMCB, UPR 9048, F-33600, Pessac, France;1. CNEA, Centro Atómico Bariloche, S. C. de Bariloche, Río Negro, Argentina;2. Universidad Nacional de Cuyo, Instituto Balseiro, S. C. de Bariloche, Río Negro, Argentina;3. Universidad Nacional de San Martín, Instituto Jorge A. Sábato, San Martín, Buenos Aires, Argentina;4. CNEA, CONICET, Centro Atómico Bariloche, S. C. de Bariloche, Río Negro, Argentina;5. University of Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, F-33600, Pessac, France;1. School of Materials Science and Engineering and Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of Technology, Guangzhou, 510641, People’s Republic of China;2. Department of Materials Science, Fudan University, Shanghai, 200433, People’s Republic of China;3. School of Materials Science and Engineering, Anhui University of Technology, Maanshan, Anhui, 243002, People’s Republic of China;4. China-Australia Joint Laboratory for Energy & Environmental Materials, South China University of Technology, Guangzhou, 510641, People’s Republic of China |
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| Abstract: | Magnesium powder was ball milled with different weight percentages of NaCl and KCl. These mixtures were added to hot water (80 °C) and the hydrogen generation rate was measured. The results show that the hydrogen generation rate increased with an increase of the presence of both salts. Moreover, increase of the time of milling increased the hydrogen generation rate. The structure of magnesium salt mixtures was further investigated using SEM and EDS and it was demonstrated that higher hydrogen generation rate is correlated with the degree of penetration of the salt into magnesium particles. In addition, we determined that for the 15 h milled composite samples, Mg–KCl mixture generates 200 mL more hydrogen than Mg–NaCl for every 1 g Mg used. These results show that KCl salt addition is promising for hydrogen generation in presented experimental system. |
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| Keywords: | Hydrogen generation Ball milling Mg–NaCl Mg–KCl Hot water |
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