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学科主题物理化学
Hydrogen storage over alkali metal hydride and alkali metal hydroxide composites
Yu, Pei; Chua, Yong Shen; Cao, Hujun; Xiong, Zhitao; Wu, Guotao; Chen, Ping; YongshenChua; ZhitaoXiong
关键词Hydrogen Storage Alkali Metal Hydroxide Alkali Metal Hydride Thermodynamic Kinetic
刊名JOURNAL OF ENERGY CHEMISTRY
2014-07-01
DOI10.1016/S2095-4956(14)60166-2
23期:4页:414-419
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Applied ; Chemistry, Physical ; Energy & Fuels ; Engineering, Chemical
研究领域[WOS]Chemistry ; Energy & Fuels ; Engineering
关键词[WOS]COMPLEX ; SYSTEM
英文摘要Alkali metal hydroxide and hydride composite systems contain both protic (H bonded with O) and hydridic hydrogen. The interaction of these two types of hydrides produces hydrogen. The enthalpy of dehydrogenation increased with the increase of atomic number of alkali metals, i.e., -23 kJ/mol(H2) for LiOH-LiH, 55.34 kJ/mol(H2) for NaOH-NaH and 222 kJ/mol(H2) for KOH-KH. These thermodynamic calculation results were consistent with our experimental results. H-2 was released from LiOH-LiH system during ball milling. The dehydrogenation temperature of NaOH-NaH system was about 150 degrees C; whereas KOH and KH did not interact with each other during the heating process. Instead, KH decomposed by itself. In these three systems, NaOH-NaH was the only reversible hydrogen storage system, the enthalpy of dehydrogenation was about 55.65 kJ/mol(H2), and the corresponding entropy was ca. 101.23 J/(mol(H2)center dot K), so the temperature for releasing 1.0 bar H-2 was as high as 518 degrees C, showing unfavorable thermodynamic properties. The activation energy for hydrogen desorption of NaOH-NaH was found to be 57.87 kJ/mol, showing good kinetic properties.
语种英语
WOS记录号WOS:000340350900002
引用统计
被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/144444
专题中国科学院大连化学物理研究所
通讯作者YongshenChua; ZhitaoXiong
作者单位Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Liaoning, Peoples R China
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GB/T 7714
Yu, Pei,Chua, Yong Shen,Cao, Hujun,et al. Hydrogen storage over alkali metal hydride and alkali metal hydroxide composites[J]. JOURNAL OF ENERGY CHEMISTRY,2014,23(4):414-419.
APA Yu, Pei.,Chua, Yong Shen.,Cao, Hujun.,Xiong, Zhitao.,Wu, Guotao.,...&ZhitaoXiong.(2014).Hydrogen storage over alkali metal hydride and alkali metal hydroxide composites.JOURNAL OF ENERGY CHEMISTRY,23(4),414-419.
MLA Yu, Pei,et al."Hydrogen storage over alkali metal hydride and alkali metal hydroxide composites".JOURNAL OF ENERGY CHEMISTRY 23.4(2014):414-419.
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