Stability of LaNi5−x Alx alloys (x=0∼0.5 during hydriding and dehydriding cycling in hydrogen containing O2 and H2O

Nishimura, K.; Sato, Kouichi; Nakamura, Yumiko; Inazumi, Chikashi; Oguro, Keisuke; Uehara, I.; Fujitani, S.; Yonezu, I.

doi:10.1016/s0925-8388(97)00441-6

Cited by 28 publications

(14 citation statements)

References 8 publications

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“…It decreased by 2.2% along 1000 cycles. One can compare this value to 5%/1000 cycles for LaNi 4.5 Al 0.5 contaminated by 20 ppm H 2 O [12]. The maximal capacity h s is nearly proportional to the capacity of the two-phase region (␣ + ␤), which follows a critical behaviour with respect to temperature:…”

Section: Isothermal Behaviourmentioning

confidence: 98%

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Hydrogen sorption cycling performance of LaNi4.8Sn0.2

Laurencelle

Dehouche

Goyette

2006

Journal of Alloys and Compounds

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Section: Isothermal Behaviourmentioning

confidence: 98%

“…tion induced by the sorption processes [11]. Nishimura et al have shown that LaNi 5−x Al x , with x = 0.5-0.8 resist better to oxidation by water and oxygen than LaNi 5 [12]. Similar resistance is obtained with the addition of Co or Sn.…”

Section: Introductionmentioning

confidence: 95%

Hydrogen sorption cycling performance of LaNi4.8Sn0.2

Laurencelle

Dehouche

Goyette

2006

Journal of Alloys and Compounds

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“…The coefficient k in is expected to represent the contribution of the absorption kinetics of the first hydride. A common model [11][12] would express that reaction rate such as:…”

Section: C) Tuning Of the Operating Parametersmentioning

confidence: 99%

Experimental study on a metal hydride based hydrogen compressor

Laurencelle¹,

Dehouche²,

Morin³

et al. 2009

Journal of Alloys and Compounds

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A three-stage metal hydride based hydrogen compressor prototype was built. It has been initially constructed for a hydrogen production facility using a low-pressure alkaline electrolyser. The compression system has been designed to transfer heat recovered from the electrolyser in the hydride beds to allow hydrogen desorption flow. The three-stage compressor achieves a compression ratio of 20:1 atm. It performs a thermal cycling of three AB 5 hydrides between 20 and 80°C. Its flow rate, for 25 g of each hydride bed, reaches about 20 L (NTP) of hydrogen per hour. The prototype is now operational. Some improvements in the heat transfer management system are also carried out before proceeding to the interconnection with the electrolyser and to the extent that the hydrogen produced satisfies the high purity requirement of the hydrides used in the compressor.

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“…They have been tested up to 10,000 cycles in the case of LaNi 4.8 Sn 0.2 [11,12] and up to 800 cycles with impure hydrogen in the case of LaNi 4.7 Al 0.3 [13]. Therefore they are frequently used for substituting a part of the nickel.…”

Section: Selection Of Hydriding Alloysmentioning

confidence: 99%