Sustainable hydrogen generation substrates, catalysts and methods : an overview
- Adeniran, J. A., DeKoker, J. J., Akinlabi, Esther Titilayo, Jen, T. C.
- Authors: Adeniran, J. A. , DeKoker, J. J. , Akinlabi, Esther Titilayo , Jen, T. C.
- Date: 2017
- Subjects: Hydrogen generation , Hydrolysis , Ball milling
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/231926 , uj:23640 , Citation: Adeniran, J.A. et al. 2017. Sustainable hydrogen generation substrates, catalysts and methods : an overview.
- Description: Abstract: Because of the increasing demand for energy, various alternative sources of energy generation are being examined. Interest in hydrogen generation is on the rise due to its potential as a scalable green energy source, its transportability, and other positive factors. While various studies have been conducted on hydrogen generation, this review explores three major factors in hydrogen generation in relation to sustainability: substrates or hydrogen storage media, catalysts for speeding up the rate of hydrogen reaction, and methods employed. The media used to store the hydrogen, such as metal hydrides and complex hydrides, is examined in relationship to hydrogen yield, ease of hydrogen generation or treatment, cost and environmental friendliness. A list of popular catalysts - particularly precious/rare earth metals, strong acids and weak acids - is examined and compared in terms of hydrogen yield, environmental friendliness, and cost. The recent trend in hydrogen generation techniques and material treatment innovations such as hydrolysis, and ball milling of nanocomposites is examined. Innovations in hydrogen storage material selection and techniques will go a long way in lowering hydrogen generation cost, increasing hydrogen yield and ameliorating negative environmental impacts.
- Full Text:
- Authors: Adeniran, J. A. , DeKoker, J. J. , Akinlabi, Esther Titilayo , Jen, T. C.
- Date: 2017
- Subjects: Hydrogen generation , Hydrolysis , Ball milling
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/231926 , uj:23640 , Citation: Adeniran, J.A. et al. 2017. Sustainable hydrogen generation substrates, catalysts and methods : an overview.
- Description: Abstract: Because of the increasing demand for energy, various alternative sources of energy generation are being examined. Interest in hydrogen generation is on the rise due to its potential as a scalable green energy source, its transportability, and other positive factors. While various studies have been conducted on hydrogen generation, this review explores three major factors in hydrogen generation in relation to sustainability: substrates or hydrogen storage media, catalysts for speeding up the rate of hydrogen reaction, and methods employed. The media used to store the hydrogen, such as metal hydrides and complex hydrides, is examined in relationship to hydrogen yield, ease of hydrogen generation or treatment, cost and environmental friendliness. A list of popular catalysts - particularly precious/rare earth metals, strong acids and weak acids - is examined and compared in terms of hydrogen yield, environmental friendliness, and cost. The recent trend in hydrogen generation techniques and material treatment innovations such as hydrolysis, and ball milling of nanocomposites is examined. Innovations in hydrogen storage material selection and techniques will go a long way in lowering hydrogen generation cost, increasing hydrogen yield and ameliorating negative environmental impacts.
- Full Text:
Phase-structural and morphological features, dehydrogenation/re-hydrogenation performance and hydrolysis of nanocomposites prepared by ball milling of MgH2 with germanium
- Adeniran, J. A., Akbarzadeh, R., Lototskyy, M., Nyallang Nyamsi, S., Olorundare, O. F., Akinlabi, Esther Titilayo, Jen, T. C.
- Authors: Adeniran, J. A. , Akbarzadeh, R. , Lototskyy, M. , Nyallang Nyamsi, S. , Olorundare, O. F. , Akinlabi, Esther Titilayo , Jen, T. C.
- Date: 2019
- Subjects: Magnesium hydride , Germanium , Ball milling
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/396766 , uj:32950 , Citation: Adeniran, J. A. 2019. Phase-structural and morphological features, dehydrogenation/re-hydrogenation performance and hydrolysis of nanocomposites prepared by ball milling of MgH2 with germanium.
- Description: Abstract: Ball milling of magnesium hydride with germanium additives in argon for up to 10 hours was shown to result in the formation of nanocomposites of - and -modifications of MgH2 together with individual Ge phase. During the heating, Ge interacts with MgH2 to form Mg2Ge at T>370 °C; the phase transformation overlaps with MgH2 decomposition and Mg2Ge phase remains in the material after its re-hydrogenation at T=350 °C and P(H2)~15 bar. The ball milled Ge-MgH2 nanocomposites were found to be characterised by an improved hydrogen release via hydrolysis in organic acid solutions as compared to pure MgH2 prepared and tested at the same conditions. It was found that the composite containing 5 wt% of Ge and ball milled for 5 hours showed the best hydrogen generation performance, with total hydrogen release exceeding 1.55 NL/g (yield close to 100%) in one minute.
- Full Text:
- Authors: Adeniran, J. A. , Akbarzadeh, R. , Lototskyy, M. , Nyallang Nyamsi, S. , Olorundare, O. F. , Akinlabi, Esther Titilayo , Jen, T. C.
- Date: 2019
- Subjects: Magnesium hydride , Germanium , Ball milling
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/396766 , uj:32950 , Citation: Adeniran, J. A. 2019. Phase-structural and morphological features, dehydrogenation/re-hydrogenation performance and hydrolysis of nanocomposites prepared by ball milling of MgH2 with germanium.
- Description: Abstract: Ball milling of magnesium hydride with germanium additives in argon for up to 10 hours was shown to result in the formation of nanocomposites of - and -modifications of MgH2 together with individual Ge phase. During the heating, Ge interacts with MgH2 to form Mg2Ge at T>370 °C; the phase transformation overlaps with MgH2 decomposition and Mg2Ge phase remains in the material after its re-hydrogenation at T=350 °C and P(H2)~15 bar. The ball milled Ge-MgH2 nanocomposites were found to be characterised by an improved hydrogen release via hydrolysis in organic acid solutions as compared to pure MgH2 prepared and tested at the same conditions. It was found that the composite containing 5 wt% of Ge and ball milled for 5 hours showed the best hydrogen generation performance, with total hydrogen release exceeding 1.55 NL/g (yield close to 100%) in one minute.
- Full Text:
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