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题名: The dehydrogenation performance and reaction mechanisms of Li3AlH6 with TiF3 additive
作者: Liu, Shu-Sheng1, 2;  Zhang, Yao1;  Sun, Li-Xian1;  Zhang, Jian1;  Zhao, Jun-Ning1;  Xu, Fen3;  Huang, Feng-Lei4
关键词: Dehydrogenation ;  Titanium fluoride ;  Alanate ;  Kinetic ;  Mechanism
刊名: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
发表日期: 2010-05-01
DOI: 10.1016/j.ijhydene.2009.12.108
卷: 35, 期:10, 页:4554-4561
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
英文摘要: For Li3AlH6 prepared by mechanical milling method, the dissociation reaction enthalpy and activation energy are calculated to be 22.1 kJ mol(-1) H-2 and 133.7 +/- 2.7 kJ moll, respectively. The dehydrogenation performance of Li3AlH6 is greatly enhanced by TiF3 additive, especially in the kinetic behaviors. For the Li3AlH6 + 10 mol% TiF3 sample, the starting temperature of dehydrogenation is obviously decreased by 60 degrees C from that of pure Li3AlH6 (190 degrees C), and 3.0 wt.% H-2 may be released within 1000 s at 120 degrees C under an initial vacuum. With the amount of TiF3 increasing, the starting temperature decreases and the kinetics improves due to the decrease in the activation energy. The X-ray diffraction (XRD) together with thermogravimetric analysis (TGA) results show that there are three mechanochemical reactions involved during milling: i) Li3AlH6 + TiF3 -> 3 LiF + Al + Ti + 3H(2), ii) Ti + H-2 TiH2, iii) 3 Al + Ti -> Al3Ti. The in-situ formed Ti species (TiH2 and Al3Ti) co-catalyze the thermal dehydrogenation of Li3AlH6. (C) 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
关键词[WOS]: REVERSIBLE HYDROGEN STORAGE ;  THERMODYNAMIC PROPERTIES ;  THERMAL-DECOMPOSITION ;  DOPED NAALH4 ;  AL-TI ;  LIALH4 ;  HYDRIDE ;  STABILITY ;  CATALYST ;  DESORPTION
语种: 英语
WOS记录号: WOS:000278418700012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141647
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Mat & Thermochem Lab, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
3.Liaoning Normal Univ, Fac Chem & Chem Engn, Dalian 116029, Peoples R China
4.Beijing Inst Technol, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China

Recommended Citation:
Liu, Shu-Sheng,Zhang, Yao,Sun, Li-Xian,et al. The dehydrogenation performance and reaction mechanisms of Li3AlH6 with TiF3 additive[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2010,35(10):4554-4561.
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