апрель 2019

The cast porous alloys as accumulators of a hydrogen

Trofimenko V. V. , Karlova S. E.
Химия и современные технологии
Abstract / Full Text

The cast porous alloys as accumulators of a hydrogen / Химия и современные технологии : Метериалы ІХ Международной научно-технической конференции студентов, аспирантов и молодых ученых «Химия и современные технологии», 2019. – C. 43

Are considered the anisotropic porous metals, a representing metal matrix with in regular intervals distributed in it cylindrical pores. This new type of materials, considerably distinguished from known of porous composition on structure and, as a consequence, on mechanical properties.

Is shown, that strength property of anisotropic porous metals exceed in 2-4 times depending on porous properties conventional of porous metals. Besides insignificant thickness of walls and the large specific surface permits to execute intensive saturation of porous metals and alloys with a hydrogen and extraction it at in comparison low temperatures.

With the purpose of acceleration fill up, elimination of high pressure and temperatures, accompanying it account of technological parameters of filling of anisotropic porous metals by a liquid hydrogen is made. As a result of accounts is established, that the saturation of anisotropic porous metals by a liquid hydrogen permits essentially to simplify and to reduce process full up by a gas of a heat-sink element at the expense of elimination of operation high-temperature diffusion of saturation in environment of high pressure.

To accumulate a hydrogen it is possible not only saturation of porous metals and alloys at high pressure, but also saturation at lower pressure of a gas phase with further comprehensive compress, that technological and safely. Besides the increase of pressure in porous, in comparison with pressure of saturation for the account compress permits to increase compactness of a storage.

For acceleration of process saturation and discharge of storage of anisotropic porous metals and the increases of their capacity are used heat-sink elements with closed unidirectional pores. And saturation by a hydrogen were executed at heating of one of end faces of a accumulator and cooling of the other surface with difference of temperatures 573-773 K.

The researches show advantages of anisotropic porous metals in comparison with known, such as hydride, gas-container, cryogenic, micro-spherical. However are established and negative property of storage elements from such metals, for example, necessity of use for fill up of storages of high pressure and temperatures, as well as in comparison a long time of process fill up.

Thus, it should make the conclusion about perspective of use of anisotropic porous metals as elements of hydrogen storages and the further work in this direction should be developed so that to remove rather essential defects and already in the present moment proceed from laboratory tests to industrial manufacture of elements accumulation of a hydrogen.