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:
Simultaneous brewery wastewater treatment and hydrogen generation via hydrolysis using Mg waste scraps
- Akbarzadeh, R., Adeniran, J.A., Lototskyy, M., Asadi, A.
- Authors: Akbarzadeh, R. , Adeniran, J.A. , Lototskyy, M. , Asadi, A.
- Date: 2020
- Subjects: Brewery wastewater , Treatment , Hydrogen generation
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/433092 , uj:37436 , Citation: Akbarzadeh, R. et al. 2020. Simultaneous brewery wastewater treatment and hydrogen generation via hydrolysis using Mg waste scraps.
- Description: Abstract: An advanced, eco-efficient “waste plus waste to hydrogen” method was developed for hydrogen generation and the simultaneous treatment of two types of waste generated from magnesium and brewerybased industries via hydrolysis. The hydrolysis of Mg scraps was carried out using brewery wastewater and the reaction was accelerated with acetic acid (aa) at different concentrations (0, 12, 18, 24 and 30 wt% aa). The concentration of pollutants such as cyclortisiloxane-hexamethyle (C6H18O3Si3), which are persistent in conventional wastewater treatment, was successfully reduced. After the hydrolysis of the wastewater, 62.4% of chemical oxygen demand (COD) reduction and the complete colour removal were observed. The highest hydrogen generation, about 0.99 NL/min (>60% H2 yield in 5 min), was observed in the presence of 30 wt% aa concentration in the hydrolysis reaction. This study proposes an eco-efficient hydrogen generation and waste treatment method as it simultaneously degrades pollutants and produces hydrogen utilizing Mg scrap waste and brewery wastewater without additional energy consumption.
- Full Text:
- Authors: Akbarzadeh, R. , Adeniran, J.A. , Lototskyy, M. , Asadi, A.
- Date: 2020
- Subjects: Brewery wastewater , Treatment , Hydrogen generation
- Language: English
- Type: Article
- Identifier: http://hdl.handle.net/10210/433092 , uj:37436 , Citation: Akbarzadeh, R. et al. 2020. Simultaneous brewery wastewater treatment and hydrogen generation via hydrolysis using Mg waste scraps.
- Description: Abstract: An advanced, eco-efficient “waste plus waste to hydrogen” method was developed for hydrogen generation and the simultaneous treatment of two types of waste generated from magnesium and brewerybased industries via hydrolysis. The hydrolysis of Mg scraps was carried out using brewery wastewater and the reaction was accelerated with acetic acid (aa) at different concentrations (0, 12, 18, 24 and 30 wt% aa). The concentration of pollutants such as cyclortisiloxane-hexamethyle (C6H18O3Si3), which are persistent in conventional wastewater treatment, was successfully reduced. After the hydrolysis of the wastewater, 62.4% of chemical oxygen demand (COD) reduction and the complete colour removal were observed. The highest hydrogen generation, about 0.99 NL/min (>60% H2 yield in 5 min), was observed in the presence of 30 wt% aa concentration in the hydrolysis reaction. This study proposes an eco-efficient hydrogen generation and waste treatment method as it simultaneously degrades pollutants and produces hydrogen utilizing Mg scrap waste and brewery wastewater without additional energy consumption.
- Full Text:
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