06/C256
Adecuación de aleaciones formadoras de hidruros para aplicación en compresión de hidrógeno
Conditioning of hydride forming alloys applied to compression of hydrogen
Director: MEYER, Gabriel Omar
Correo electrónico: gmeyer@cab.cnea.gov.ar
Integrantes: ESQUIVEL, Marcelo Ricardo; TALAGAÑIS, B. Andrés
Resumen Técnico: El resumen técnico tiene por objetivo la aprehensión sintética de su proyecto, será almacenado en el sistema computarizado de la Secretaría de Ciencia, Técnica y Posgrado debe permitir el fácil acceso a la información. Haga una síntesis de los objetivos, la línea de investigación, la hipótesis de trabajo, la metodología, producto a obtener, sistema de transferencia y beneficios esperados. De ninguna manera debe exceder el espacio disponible en el formulario.
Summary: The successful conversion from the current energy system based on fossil fuels to a future system based on renewable sources such as hydrogen is only possible if the different stages involving production, transportation /conditioning and storage of this fluid are modified and adapted to fulfill the supply and handling at regular operation conditions. Then, the conditioning of hydrogen becomes a key stage, equivalent to the current supply stations of gas/diesel/NCG, by chaining the production and the mainstream transportation supply source. Hydride forming alloys can be used in compression/purification devices to conditioning the hydrogen. Nevertheless, the technical feasibility of using these devices is limited not only by their resilience to degradation due to cycling but also by their endurance to work with hydrogen containing impurities such as O2, CO2, SO2, etc. Extreme operation conditions, typical of control failures in mainstream supply systems, such as overheating and hazardous contact with air limit the alloys useful life and their hydrogen interaction characteristics. In that way, this project is focused on the development of conditioning technologies applicable to alloys used in compression/purification devices. This conditioning is oriented to endurance the alloy in order to resist extreme operative conditions such as hazardous thermal and pressure changes without loosing the structural and hydrogen sorption characteristics acquired during synthesis. To fulfill these requirements, it is necessary the experimental study of these properties by using characterization techniques at laboratory scale that simulate the real conditions of use. This study should determine the structural resistance to degradation of the selected alloy and its capacity of maintaining the hydrogen interaction properties acquired during its synthesis. The methodology includes the following steps: (1) Synthesis of alloys by mechanical alloying as an initial pre-treatment under both Ar and H2 atmospheres taking advantage of the knowledge acquired previously. (2) Physicochemical characterization of the alloy to determine the controlling processes during the hydrogen absorption and desorption. (3) Short time cycling under contaminated (Air, H2O, CO2, O2), reactive (H2) and inert (Ar) atmospheres and qualitative and quantitative determination of their effects on the hydrogen interaction. (4). Development of surface treatment methods such as fluorination with solid or liquid additives to increase the resistance to cycling. This project is oriented to obtain reliable alloys resistant to extreme operative/regenerative conditions. It is expected that the results transference, publishable in specialized congresses or journals be reached within the expected execution period of time of the project. It is also expected that the obtained knowledge contributes to the formation of technical and scientific staff well aware that the development of compressor devices integrated to a non pollutant energy system will have the environment and the social environment as their major beneficiaries.