INVESTIGADORES
ESQUIVEL Marcelo Ricardo Oscar
artículos
Título:
Characterization of LaNi4.70Al0.30 handled in air and application to a scheme of thermal compression of hydrogen
Autor/es:
N.M CERON-HURTADO; M.R ESQUIVEL
Revista:
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2012 vol. 37 p. 10376 - 10379
ISSN:
0360-3199
Resumen:
LaNi4.70Al0.30 was characterized by SEM, EDS and XRD. The structure was refined by theRietveld method. The intermetallic stability temperature range in air was analyzed by DSC.The intermetallic is destabilized at T > 160 C. The intermetallic was annealed at thistemperature for 24 h in air. After that, the pressure-composition-isotherms weremeasured. The thermodynamic properties were calculated from the Van´t Hoff diagrams.Values obtained were DHf ¼ 30 2 kJ/mol and DSf ¼ 0.13 0.01 kJ/mol for absorption process and DHd ¼ 31 2 kJ/mol and DSd ¼ 0.14 0.01 kJ/mol for desorption process.From these results, a scheme of thermal compression of hydrogen (TCH) was proposed.The scheme has a practical compression ratio (Rc) of 7.2 in the 25 to100 ºC temperaturerange and 1 to 1000 kPa pressure range.
