Thermodynamic and kinetic study of the thermal dehydrogenation of Sr(AlH4)2 taking into account the by-products NaCl and LiCl

被引：2

作者：

Habermann, Franziska ^{[1
]}

Burkmann, Konrad ^{[1
]}

Kraus, Jakob ^{[2
]}

Storr, Bianca ^{[1
]}

Seidel, Juergen ^{[1
]}

Kortus, Jens ^{[2
]}

Gumeniuk, Roman ^{[3
]}

Bohmhammel, Klaus ^{[1
]}

Mertens, Florian ^{[1
]}

机构：

[1] TU Bergakademie Freiberg, Inst Phys Chem, Leipziger Str 29, D-09599 Freiberg, Germany

[2] TU Bergakademie Freiberg, Inst Theoret Phys, Leipziger Str 23, D-09599 Freiberg, Germany

[3] TU Bergakademie Freiberg, Inst Theoret Phys, Leipziger Str 23, D-09599 Freiberg, Germany

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2024年 / 980卷

关键词：

Metal hydrides; Enthalpy; Entropy; Heat capacity; Thermal analysis; STATE HYDROGEN STORAGE; MOLAR HEAT-CAPACITY; CONSTANTS; HYDRIDES; NAALH4; LIALH4;

D O I：

10.1016/j.jallcom.2024.173476

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The presented work sets out to investigate the influence of LiCl and NaCl, the typical by-products of the mechanochemical synthesis of complex metal hydrides such as alanates and boranates, on the kinetics and thermodynamics of the dehydrogenation of Sr(AlH4)2. We found no effect of NaCl on the decomposition pathway of Sr(AlH4)2. Although LiCl does not affect the first dehydrogenation to SrAlH5, it does alter the further decomposition to the final products. Thermodynamic properties such as the heat capacity functions, enthalpies of formation and absolute entropies were determined for Sr(AlH4)2 itself and its decomposition product SrAlH5 within this study.

引用

页数：13

共 5 条

[1] Insight into the kinetic mechanism of the first-step dehydrogenation of Mg(AlH4)2
Pang, Yuepeng
Li, Qian
SCRIPTA MATERIALIA, 2017, 130 : 223 - 228
[2] Mechanical and Thermal Dehydrogenation of the Mechano-Chemically Synthesized Calcium Alanate (Ca(AlH4)2) and Lithium Chloride (LiCl) Composite
Varin, Robert A.
Kosciuczyk, Ewelina E.
Czujko, Tomasz
MATERIALS, 2015, 8 (06): : 3479 - 3490
[3] New insights into the effects of NaCl and LiCl on the hydrogen storage behaviours of a 6LiBH4-Mg(AlH4)2 composite
Pang, Yuepeng
Liu, Yongfeng
Zhang, Xin
Li, You
Gao, Mingxia
Pan, Hongge
RSC ADVANCES, 2015, 5 (16): : 12144 - 12151
[4] In situ synchrotron X-ray diffraction study on the improved dehydrogenation performance of NaAlH4-Mg(AlH4)2 mixture
Yang, Cheng-Hsien
Chen, Tzu-Teng
Tsai, Wen-Ta
Liu, Bernard Haochih
JOURNAL OF ALLOYS AND COMPOUNDS, 2013, 577 : 6 - 10
[5] Characterization, thermal dehydration kinetic, and thermodynamic study of synthesized cesium borate (CsB5O8•4H2O)
Dumanli, Fatma Tugce Senberber
Kipcak, Azmi Seyhun
Derun, Emek Moroydor
INORGANIC AND NANO-METAL CHEMISTRY, 2023, 53 (03) : 277 - 282

← 1 →