A kinetics model of hydrogen absorption and desorption in Ti-doped NaAlH4

被引：94

作者：

Luo, WF ^{[1
]}

Gross, KJ ^{[1
]}

机构：

[1] Sandia Natl Labs, Analyt Mat Sci Dept, Livermore, CA 94550 USA

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2004年 / 385卷 / 1-2期

关键词：

Ti-doped; kinetics; NaAlH4;

D O I：

10.1016/j.jallcom.2004.05.004

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 kinetics of the hydrogen sorption of Ti-doped direct-synthesized NaAlH4 has been studied by measuring sorption rates at various temperatures and applied pressures. Formation and decomposition rate equations for NaAlH4 and Na3AlH6 are proposed, and pre-exponential factors and activation energies have been calculated for these reactions. These equations were used to calculate alanate decomposition curves. The results fit the experimental data very well. The predictive capabilities of this empirical approach provide a very useful modeling tool for optimizing the performance of the alanates over a range of hydrogen absorption temperatures and pressures. Under a typical hydrogen-loading condition (constant pressure), the optimum temperature for "fast fill" can be determined. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：224 / 231

页数：8

共 17 条

[1] ANTON DL, 2003, FUEL CELLS INFR TECH
[2] Investigation of hydrogen discharging and recharging processes of Ti-doped NaAlH4 by X-ray diffraction analysis (XRD) and solid-state NMR spectroscopy
Bogdanovic, B
Felderhoff, M
Germann, M
Härtel, M
Pommerin, A
Schüth, F
Weidenthaler, C
Zibrowius, B
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2003, 350 (1-2) : 246 - 255
[3] Metal-doped sodium aluminium hydrides as potential new hydrogen storage materials
Bogdanovic, B
Brand, RA
Marjanovic, A
Schwickardi, M
Tölle, J
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2000, 302 (1-2) : 36 - 58
[4] Flanagan TB, 1978, HYDRIDES ENERGY STOR, P135
[5] GAO Y, 2004, AM PHYS SOC MONTR CA
[6] HYDRIDING AND DEHYDRIDING RATES OF THE LANI5-H SYSTEM
GOODELL, PD
RUDMAN, PS
[J]. JOURNAL OF THE LESS-COMMON METALS, 1983, 89 (01): : 117 - 125
[7] Dynamic in situ X-ray diffraction of catalyzed alanates
Gross, KJ
Sandrock, G
Thomas, GJ
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2002, 330 : 691 - 695
[8] Catalyzed alanates for hydrogen storage
Gross, KJ
Thomas, GJ
Jensen, CM
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2002, 330 : 683 - 690
[9] In-situ X-ray diffraction study of the decomposition of NaAlH4
Gross, KJ
Guthrie, S
Takara, S
Thomas, G
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2000, 297 (1-2) : 270 - 281
[10] GROSS KJ, 2002, DOE ANN REV

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