INVESTIGADORES
ESQUIVEL Marcelo Ricardo Oscar
artículos
Título:
Improvement of as milled properties of mechanically alloyed LaNi5 and application to hydrogen thermal compression
Autor/es:
B. A. TALAGAÑIS; M.R. ESQUIVEL; G. M EYER
Revista:
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam-Países Bajos; Año: 2011 vol. 36 p. 11961 - 11968
ISSN:
0360-3199
Resumen:
LaNi5 was obtained from raw materials by low energy mechanical alloying. Hydriding properties of as-milled intermetallic were improved by annealing. Pressure-composition isotherms showed flat plateaus when annealing temperature was 600 °C, this value is at least 300 °C lower than the synthesis and annealing temperature of standard equilibrium methods. This low energy mechanical alloying and low temperature annealing procedure reduces the number of intermediate stages needed to scale up the fabrication of the intermetallic. After cycling this material in hydrogen, its hydriding properties were studied in the 25 to 90 °C range. From these results, we propose a one-stage hydrogen thermal compression scheme working between 25 °C (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %.
