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中南大学学报(自然科学版)

Journal of Central South University

第31卷    第1期    总第131期    2000年2月

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文章编号:1004-0609(2000)01-0069-04
LaNi4.7Al0.3和MlNi4.5Al0.5合金在 H2-CO系统中贮氢性能下降的研究
桑     革,涂铭旌,李全安,闫康平,陈云贵,李    宁,唐定骧

(四川大学金属材料系,成都610065)

摘 要: 研究了贮氢合金LaNi4.7Al0.3和MlNi4.5Al0.5在纯氢(99.999%)及氢中含CO气体杂质条件下的p-c-t 特性及循环性能。结果表明,合金经CO毒化后,平台压升高,平台倾斜加剧,平台宽度缩小,饱和吸氢量减小。毒化后两种贮氢合金的循环性能衰退,而且随着循环次数的增加吸氢量减少,增加CO的浓度,吸氢量减少更加明显。合金贮氢性能下降的原因可能是由于表面生成了氧化物及新相,阻止了氢的吸附与扩散。

 

关键字:  一氧化碳;贮氢合金;毒化

Degradation of hydrogenation properties of LaNi4.7Al0.3 and MlNi4.5Al0.5 alloys on condition of H2-CO atmosphere
SANG Ge, TU Ming-jing, LI Quan-an, YAN Kang-ping, CHEN Yun-gui, LI Ning, TAND Ding-xiang

Department of Metal Materials and Engineering, Sichuan University, Chengdu 610065, P.R.China

Abstract:The p-c-t degradation behaviours and cycling hydriding of LaNi4.7Al0.3 and MlNi4.5Al0.5 alloys were investigated by measuring the difference between pure hydrogen and hydrogen containing CO. The plateaus of LaNi4.7Al0.3 and MlNi4.5Al0.5 alloys were both lifted and inclined, the width of p-c-t curve was shorted, the absorbed hydrogen content was reduced drastically after poisoning. The amount of hydrogen absorbed was decreased continuously as the number of cycles was increased under same concentration of CO. The higher of the concentration of CO, the lower of the cycling properties. The reasons of poison was analyzed through XPS and XRD.

 

Key words: carbon monoxide; hydrogen storage alloys; poisoning

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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