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The reactions in LiBH4-NaNH2 hydrogen storage system
Zhang, Yao1; Tian, Qifeng2,3
关键词Hydrogen Storage Stepwise Reactions Libh4-nanh2 System
刊名INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
2011-08-01
DOI10.1016/j.ijhydene.2011.05.035
36期:16页:9733-9742
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Physical ; Electrochemistry ; Energy & Fuels
研究领域[WOS]Chemistry ; Electrochemistry ; Energy & Fuels
关键词[WOS]N-H SYSTEM ; LITHIUM BOROHYDRIDE ; LIBH4 ; HYDRIDE ; DESORPTION ; TRANSITION ; MIXTURES ; RELEASE ; IMIDES ; AMIDE
英文摘要Stepwise reactions were observed in the ball milling and heating process of the LiBH4-NaNH2 system by means of X-ray diffraction (XRD) and Fourier transform infrared spectrometry (FT-IR). During the ball milling process, two concurrent reactions take place in the mixture: 3LiBH(4) + 4NaNH(2) -> Li3Na(NH2)(4) + 3NaBH(4) and LiBH4 + NaNH2 -> LiNH2 + NaBH4. The heating process from 50 degrees C to 400 degrees C is mainly the concurrent reactions of Li3Na(NH2)(4) + 3LiBn(4) -> 2Li(3)BN(2) + NaBH4 + 8H(2) and 2LiNH(2) + LiBH4 -> Li3BN2H8 -> Li3BN2 + 4H(2), where the intermediate phases Li3Na(NH2)(4) and LiNH2 serve as the reagents to decompose LiBH4. The merged equations for the mechanochemical and the heating reactions below 400 degrees C can be denoted as 3LiBH(4) + 2NaNH(2) -> Li3BN2 + 2NaBH(4) + 4H(2). The maximum dehydrogenation capacity in closed system below 400 degrees C is 5.1 wt.% H-2, which agrees well with the theoretical capacity (5.5 wt.% H-2) of the merged equation and thus demonstrates the suggested pathway. The subsequent step consists of the decompositions of NaBH4 and Li3Na(NH2)(4) within the temperature range of 400 degrees C-600 degrees C. The apparent activation energies of the two steps are 114.8 and 123.5 kJ/mol, respectively. They are all lower than that of our previously obtained bulk LiBH4. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
语种英语
WOS记录号WOS:000294374800038
引用统计
被引频次:25[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/321008/142295
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, Complex Hydride Mat Res Grp, Dalian 116023, Peoples R China
2.Wuhan Inst Technol, Minist Educ, Key Lab Green Chem Proc, Wuhan 430073, Peoples R China
3.Wuhan Inst Technol, Hubei Key Lab Novel Reactor & Green Chem Technol, Wuhan 430073, Peoples R China
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Zhang, Yao,Tian, Qifeng. The reactions in LiBH4-NaNH2 hydrogen storage system[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2011,36(16):9733-9742.
APA Zhang, Yao,&Tian, Qifeng.(2011).The reactions in LiBH4-NaNH2 hydrogen storage system.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,36(16),9733-9742.
MLA Zhang, Yao,et al."The reactions in LiBH4-NaNH2 hydrogen storage system".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 36.16(2011):9733-9742.
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