Kinetics of hydrogen desorption from MgH2 and AlH3 hydrides

被引：3

作者：

Terent'ev, P. B. ^{[1
]}

Gerasimov, E. G. ^{[1
]}

Mushnikov, N. V. ^{[1
]}

Uimin, M. A. ^{[1
]}

Maikov, V. V. ^{[1
]}

Gaviko, V. S. ^{[1
]}

Golovatenko, V. D. ^{[2
]}

机构：

[1] Russian Acad Sci, Inst Met Phys, Ural Branch, Ekaterinburg 620990, Russia

[2] OKB Novator, Ekaterinburg 620017, Russia

来源：

PHYSICS OF METALS AND METALLOGRAPHY | 2015年 / 116卷 / 12期

关键词：

magnesium hydride; aluminum hydride; desorption of hydrogen; kinetics; activation energy; MAGNESIUM HYDRIDE; THERMAL-DESORPTION; DECOMPOSITION; ALLOYS;

D O I：

10.1134/S0031918X15120121

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Kinetic parameters of the process of thermal decomposition of the MgH2 hydride (obtained by the method of the mechanoactivation of magnesium in a hydrogen atmosphere) and of the commercial AlH3 hydride have been studied upon the rapid heating in the range of temperatures of 150-510A degrees C at hydrogen pressures of 0-2 atm. The time dependences of the amount of hydrogen released by the metal hydrides at different temperatures and pressures have been determined. It has been shown that the activation energies of the hydrogen desorption are 135 kJ/mol for MgH2 and 107 kJ/mol for AlH3. The maximum rates of hydrogen desorption from the investigated metal hydrides have been established, and the temperatures and initial pressures that ensure the maximum rate and maximum volume of the hydrogen release have been determined.

引用

页码：1197 / 1202

页数：6

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