Studies on La based intermetallic hydrides to determine their suitability in metal hydride based cooling systems

被引：44
|
作者：
Sharma, Vinod Kumar [1 ]
Kumar, E. Anil [1 ]
机构：
[1] Indian Inst Technol, Discipline Mech Engn, Indore 453446, Madhya Pradesh, India
来源：
INTERMETALLICS | 2015年 / 57卷
关键词：
Intermetallics; Hydrides; Hydrogen storage; Thermal stability; Thermodynamic properties; CHEMICAL HEAT-PUMP; HYDROGEN ABSORPTION; THERMODYNAMIC PROPERTIES; PARTIAL REPLACEMENT; LANI5; KINETICS; PRASEODYMIUM; NEODYMIUM; PRESSURE; ALLOYS;
D O I：
10.1016/j.intermet.2014.10.004
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The La0.9Ce0.1Ni5, La0.8Ce0.2Ni5, LaNi4.7Al0.3 and LaNi4.6Al0.4 intermetallic hydrides were characterised to determine their suitability in metal hydride based cooling system (MHCS). The performance of the MHCS depends on the driving potential, and rate and amount of hydrogen transfer between coupled metal hydride (MH) beds. Therefore, the effect of compositional changes on the variation of these parameters due to the variation in pressure - concentration isotherm (PCI) properties (storage capacity, plateau slope, hysteresis effect, etc.) of metal hydrides employed was studied. Compared to other possible MH pairs, La0.9Ce0.1Ni5 - LaNi4.7Al0.3 hydride pair exhibited high driving potential and transferrable amount of hydrogen, during cooling and regeneration processes, thereby better MHCS performance. In addition, the effect of change in hydrogen concentration (due to hydrogen transfer between coupled MH beds) on reaction enthalpy (Delta H) consequently on MHCS performance was found significant (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：60 / 67
页数：8
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