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题名: Studies on heat capacities and thermal analysis of Li-Mg-N-H hydrogen storage system
作者: Xu, F.2;  Sun, L. X.1;  Chen, P.1;  Qi, Y. N.1;  Zhang, J.1;  Zhao, J. N.1;  Liu, Y. F.3;  Zhang, L.4;  Cao, Zhong4;  Yang, D. W.4;  Zeng, J. L.4;  Du, Y.5
关键词: Li-Mg-N-H system ;  MDSC ;  Heat capacity ;  TG
刊名: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
发表日期: 2010-05-01
DOI: 10.1007/s10973-009-0603-5
卷: 100, 期:2, 页:701-706
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Analytical ;  Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: The heat capacities of LiNH2 and Li2MgN2H2 were measured by a modulated differential scanning calorimetry (MDSC) over the temperature range from 223 to 473 K for the first time. The value of heat capacity of LiNH2 is bigger than that of Li2MgN2H2 from 223 to 473 K. The thermodynamic parameters such as enthalpy (H-H (298.15)) and entropy (S-S (298.15)) versus 298.15 K were calculated based on the above heat capacities. The thermal stabilities of them were investigated by thermogravimetric analysis (TG) at a heating rate of 10 K min(-1) with Ar gas flow rate of 30 mL min(-1) from room temperature to 1,080 K. TG curves showed that the thermal decomposition of them occurred in two stages. The order of thermal stability of them is: Li2MgN2H2 > LiNH2. The results indicate that addition of Mg increases the thermal stability of Li-N-H system and decrease the value of heat capacities of Li-N-H system.
关键词[WOS]: DIFFERENTIAL SCANNING CALORIMETRY ;  THERMODYNAMIC PROPERTIES ;  IMIDES ;  DSC
语种: 英语
WOS记录号: WOS:000276771600043
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142204
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, Dalian Inst Chem Phys, Mat & Thermochem Lab, Dalian 116023, Peoples R China
2.Liaoning Normal Univ, Coll Chem & Chem Engn, Dalian 116029, Peoples R China
3.Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China
4.Changsha Univ Sci & Technol, Sch Chem & Environm Engn, Changsha 410076, Hunan, Peoples R China
5.Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

Recommended Citation:
Xu, F.,Sun, L. X.,Chen, P.,et al. Studies on heat capacities and thermal analysis of Li-Mg-N-H hydrogen storage system[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,2010,100(2):701-706.
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