The Experts below are selected from a list of 6141 Experts worldwide ranked by ideXlab platform
J. P. Vanhanen - One of the best experts on this subject based on the ideXlab platform.
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Electrolyser-metal hydride-fuel cell system for seasonal energy storage
International Journal of Hydrogen Energy, 1998Co-Authors: J. P. VanhanenAbstract:Abstract A small-scale seasonal energy storage system, comprising an electrolyser, metal hydride Hydrogen Store and fuel cell, has been studied. According to the feasibility study, solid polymer electrolysers and fuel cells are the best options for the electrolyser-metal hydride-fuel cell energy storage systems. A round-trip efficiency of 30% has already been demonstrated, and the next target is to reach a round-trip efficiency close to 40%. The electrolysermetal hydride-fuel cell systems are suitable for small-scale self-sufficient applications in which high volumetric capacity is needed and safety aspects are appreciated.
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feasibility study of a metal hydride Hydrogen Store for a self sufficient solar Hydrogen energy system
International Journal of Hydrogen Energy, 1996Co-Authors: J. P. Vanhanen, Peter Lund, M T HagstromAbstract:Abstract The feasibility of using metal hydride Hydrogen storage in a self-sufficient solar Hydrogen energy system is studied. Several potential commercial and non-commercial metal hydrides are considered to find a material having a low Δ H value, a low hysteresis effect, gentle P - C - T , plateau slopes and a high Hydrogen storage capacity. A 1 N m 3 metal hydride container employing a commercial Hydralloy C15 metal hydride with the proper P - C - T curves is analysed in more detail. As the thermal behaviour of the container is crucial in our application, steady-state and time-dependent thermal properties of the container are measured and the respective models are derived. The metal hydride container is also tested under realistic conditions to get further operational experience on its technical feasibility. Based on this study, low-temperature metal hydrides seem to be technically and economically feasible for small-scale self-sufficient solar Hydrogen systems in which high volumetric energy density is needed due to limited space.
Peter P Edwards - One of the best experts on this subject based on the ideXlab platform.
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High-capacity Hydrogen storage in lithium and sodium amidoboranes
Nature Materials, 2008Co-Authors: Zhitao Xiong, Chaw Keong Yong, Wendy Shaw, Thomas Autrey, Martin Owen Jones, Simon R. Johnson, Guotao Wu, Abhi Karkamkar, Ping Chen, Peter P EdwardsAbstract:The safe and efficient storage of Hydrogen is widely recognized as one of the key technological challenges in the transition towards a Hydrogen-based energy economy1, 2. Whereas Hydrogen for transportation applications is currently Stored using cryogenics or high pressure, there is substantial research and development activity in the use of novel condensed-phase hydride materials. However, the multiple-target criteria accepted as necessary for the successful implementation of such Stores have not yet been met by any single material. Ammonia borane, NH3BH3, is one of a number of condensed-phase compounds that have received significant attention because of its reported release of approx12 wt% Hydrogen at moderate temperatures (approx150 °C). However, the Hydrogen purity suffers from the release of trace quantities of borazine. Here, we report that the related alkali-metal amidoboranes, LiNH2BH3 and NaNH2BH3, release approx10.9 wt% and approx7.5 wt% Hydrogen, respectively, at significantly lower temperatures (approx90 °C) with no borazine emission. The low-temperature release of a large amount of Hydrogen is significant and provides the potential to fulfil many of the principal criteria required for an on-board Hydrogen Store.
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chemical activation of mgh2 a new route to superior Hydrogen storage materials
Chemical Communications, 2005Co-Authors: Peter P Edwards, Simon R. Johnson, Paul A Anderson, I Gameson, James W Prendergast, Malek Almamouri, David Book, Rex I Harris, J D SpeightAbstract:We report the discovery of a new, chemical route for ‘activating’ the Hydrogen Store MgH2, that results in highly effective Hydrogen uptake/release characteristics, comparable to those obtained from mechanically-milled material.
Simon R. Johnson - One of the best experts on this subject based on the ideXlab platform.
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High-capacity Hydrogen storage in lithium and sodium amidoboranes
Nature Materials, 2008Co-Authors: Zhitao Xiong, Chaw Keong Yong, Wendy Shaw, Thomas Autrey, Martin Owen Jones, Simon R. Johnson, Guotao Wu, Abhi Karkamkar, Ping Chen, Peter P EdwardsAbstract:The safe and efficient storage of Hydrogen is widely recognized as one of the key technological challenges in the transition towards a Hydrogen-based energy economy1, 2. Whereas Hydrogen for transportation applications is currently Stored using cryogenics or high pressure, there is substantial research and development activity in the use of novel condensed-phase hydride materials. However, the multiple-target criteria accepted as necessary for the successful implementation of such Stores have not yet been met by any single material. Ammonia borane, NH3BH3, is one of a number of condensed-phase compounds that have received significant attention because of its reported release of approx12 wt% Hydrogen at moderate temperatures (approx150 °C). However, the Hydrogen purity suffers from the release of trace quantities of borazine. Here, we report that the related alkali-metal amidoboranes, LiNH2BH3 and NaNH2BH3, release approx10.9 wt% and approx7.5 wt% Hydrogen, respectively, at significantly lower temperatures (approx90 °C) with no borazine emission. The low-temperature release of a large amount of Hydrogen is significant and provides the potential to fulfil many of the principal criteria required for an on-board Hydrogen Store.
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chemical activation of mgh2 a new route to superior Hydrogen storage materials
Chemical Communications, 2005Co-Authors: Peter P Edwards, Simon R. Johnson, Paul A Anderson, I Gameson, James W Prendergast, Malek Almamouri, David Book, Rex I Harris, J D SpeightAbstract:We report the discovery of a new, chemical route for ‘activating’ the Hydrogen Store MgH2, that results in highly effective Hydrogen uptake/release characteristics, comparable to those obtained from mechanically-milled material.
M T Hagstrom - One of the best experts on this subject based on the ideXlab platform.
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feasibility study of a metal hydride Hydrogen Store for a self sufficient solar Hydrogen energy system
International Journal of Hydrogen Energy, 1996Co-Authors: J. P. Vanhanen, Peter Lund, M T HagstromAbstract:Abstract The feasibility of using metal hydride Hydrogen storage in a self-sufficient solar Hydrogen energy system is studied. Several potential commercial and non-commercial metal hydrides are considered to find a material having a low Δ H value, a low hysteresis effect, gentle P - C - T , plateau slopes and a high Hydrogen storage capacity. A 1 N m 3 metal hydride container employing a commercial Hydralloy C15 metal hydride with the proper P - C - T curves is analysed in more detail. As the thermal behaviour of the container is crucial in our application, steady-state and time-dependent thermal properties of the container are measured and the respective models are derived. The metal hydride container is also tested under realistic conditions to get further operational experience on its technical feasibility. Based on this study, low-temperature metal hydrides seem to be technically and economically feasible for small-scale self-sufficient solar Hydrogen systems in which high volumetric energy density is needed due to limited space.
Zhitao Xiong - One of the best experts on this subject based on the ideXlab platform.
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High-capacity Hydrogen storage in lithium and sodium amidoboranes
Nature Materials, 2008Co-Authors: Zhitao Xiong, Chaw Keong Yong, Wendy Shaw, Thomas Autrey, Martin Owen Jones, Simon R. Johnson, Guotao Wu, Abhi Karkamkar, Ping Chen, Peter P EdwardsAbstract:The safe and efficient storage of Hydrogen is widely recognized as one of the key technological challenges in the transition towards a Hydrogen-based energy economy1, 2. Whereas Hydrogen for transportation applications is currently Stored using cryogenics or high pressure, there is substantial research and development activity in the use of novel condensed-phase hydride materials. However, the multiple-target criteria accepted as necessary for the successful implementation of such Stores have not yet been met by any single material. Ammonia borane, NH3BH3, is one of a number of condensed-phase compounds that have received significant attention because of its reported release of approx12 wt% Hydrogen at moderate temperatures (approx150 °C). However, the Hydrogen purity suffers from the release of trace quantities of borazine. Here, we report that the related alkali-metal amidoboranes, LiNH2BH3 and NaNH2BH3, release approx10.9 wt% and approx7.5 wt% Hydrogen, respectively, at significantly lower temperatures (approx90 °C) with no borazine emission. The low-temperature release of a large amount of Hydrogen is significant and provides the potential to fulfil many of the principal criteria required for an on-board Hydrogen Store.
