Absorption storage of hydrogen in alloys of Ti, Ni, Mn, C
Abstract
Hydrogen storage is considered one of the most critical issues that must be resolved for the implementation of economic and viable hydrogen energy systems. Without effective storage systems, it will be very difficult to achieve beneficial value from the hydrogen economy. One physical limit on the storage of hydrogen is the density of compressed and liquid hydrogen. Currently, considerable attention is being paid to the development of metal hydride alloys, which can effectively absorb and retain a large amount of hydrogen through chemical bonds. The article analyzes research into metal hydride alloys based on Ti-Cr-Mn, Ti-Cr-Ni and Cr-Ti-Ni0.5-Mn0.5.
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Introduction
At present, the world is paying close attention to reducing its energy dependence on oil and gas. Reducing the emission load due to the combustion of fuels is also a major issue that needs to be addressed. One possible solution to these problems is the use of renewable sources to produce hydrogen. Its use for energy purposes has no negative impact on the environment. A major problem in the implementation of hydrogen technologies in the energy sector is precisely the storage of hydrogen. Therefore if hydrogen is to be used as an ecological fuel in the future, it is necessary to create inexpensive and safe ways to store it.
Hydrogen produces metal hydrides with certain metals and alloys, which in some cases are of higher density than storage in a pressure or cryogenic vessel. Storage in metal hydride is a form of storage that is safer and more effective in terms of volume.
Conclusion
Hydrogen storage is a key problem for implementing hydrogen technology and the economic use of the element. The familiar approaches of pressure and cryogenic storage do not offer the desired safety and their implementation will require significant amounts of energy. The transition to metal hydride storage opens new opportunities for safer storage, while facing with the problem of compliance with the minimum mass of the hydrogen storage for optimal use. Their storage capacity is rarely achieved by the required storage capacity of 6.5 % by mass and therefore research is being conducted into processing known and searching for new alloys. The aim is to achieve the greatest storage capacity while maintaining an acceptable price with the highest cyclic stability of the hydride. The biggest expectations are primarily from automobile manufacturers, who are limited mainly by storage of hydrogen, leading to limited range of cars.