INVESTIGADORES
ESQUIVEL Marcelo Ricardo Oscar
artículos
Título:
A quantitative analysis of the hydrogen sorption isotherms of MmNi4.25Al0.75
Autor/es:
S.A. OBREGÓN; M.R ESQUIVEL
Revista:
Procedia Materials Science
Editorial:
Pergamon-Elsevier
Referencias:
Lugar: Amsterdam; Año: 2015 vol. 8 p. 752 - 759
ISSN:
2211-8128
Resumen:
The development of materials for hydrogen thermal compression should follow minimalistic and ecological aspects including low energy consumption, low-cost unitary operation production and low waste generation. These concepts are applied in this work by applying models previous to measurements in devices. The results include the application of a quantitative model to measurements of hydrogen sorption properties of an intermetallic of composition MmNi4,25Al0,75, synthesized by low energy reactive milling. The intermetallic was annealed in Ar at 600 ºC for 24 h to improve the microstructural properties. The samples were analyzed in a Sievert?s-type device. Curves of pressure vs. composition were previously obtained in a temperature range between 25 ºC and 100 ºC. A modeling of PCT curves was done. Two different stages were analyzed. The parameters involved in the model correspond to thermodynamic properties DHf y DSf of hydride formation. These results are used in the design of a one-stage hydrogen thermal compressor.
