Improvement of as milled properties of mechanically alloyed LaNi5 and application to hydrogen thermal compression

B. A. TALAGAÑIS; M.R. ESQUIVEL; G. M EYER

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

PERGAMON-ELSEVIER SCIENCE LTD

Lugar: Amsterdam-Países Bajos; Año: 2011 vol. 36 p. 11961 - 11968

0360-3199

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 ºC lower than the synthesis and annealing temperature of standard equilibrium methods. This low energy mechanical alloying ? 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC lower than the synthesis and annealing temperature of standard equilibrium methods. This low energy mechanical alloying ? 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC lower than the synthesis and annealing temperature of standard equilibrium methods. This low energy mechanical alloying ? 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 5 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 ºC lower than the synthesis and annealing temperature of standard equilibrium methods. This low energy mechanical alloying ? 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. ? 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC lower than the synthesis and annealing temperature of standard equilibrium methods. This low energy mechanical alloying ? 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC lower than the synthesis and annealing temperature of standard equilibrium methods. This low energy mechanical alloying ? 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 5 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 ºC lower than the synthesis and annealing temperature of standard equilibrium methods. This low energy mechanical alloying ? 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. ? 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC lower than the synthesis and annealing temperature of standard equilibrium methods. This low energy mechanical alloying ? 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC lower than the synthesis and annealing temperature of standard equilibrium methods. This low energy mechanical alloying ? 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 5 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 ºC lower than the synthesis and annealing temperature of standard equilibrium methods. This low energy mechanical alloying ? 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. ? 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC lower than the synthesis and annealing temperature of standard equilibrium methods. This low energy mechanical alloying ? 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC lower than the synthesis and annealing temperature of standard equilibrium methods. This low energy mechanical alloying ? 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 5 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 ºC lower than the synthesis and annealing temperature of standard equilibrium methods. This low energy mechanical alloying ? 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. ? 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %. 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 ºC (absorption) and 90 °C (desorption) with a compression ratio of 2.5 and a useful capacity of 1.0 mass %.