Empirical kinetic model of sodium alanate reacting system (I). Hydrogen absorption

被引：49

作者：

Lozano, Gustavo A. ^{[1
]}

Ranong, Chakkrit Na ^{[2
]}

von Colbe, Jose M. Bellosta ^{[1
]}

Bormann, Ruediger ^{[1
]}

Fieg, Georg ^{[2
]}

Hapke, Jobst ^{[2
]}

Dornheim, Martin ^{[1
]}

机构：

[1] GKSS Forschungszentrum Geesthacht GmbH, Inst Mat Res, D-21502 Geesthacht, Germany

[2] Hamburg Univ Technol, Inst Proc & Plant Engn, D-21073 Hamburg, Germany

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2010年 / 35卷 / 13期

关键词：

Sodium alanate; Kinetic model; Hydrogen storage modeling; Hydride tanks scale-up; ALUMINUM HYDRIDES; STORAGE MATERIALS; SORPTION; NAALH4;

D O I：

10.1016/j.ijhydene.2010.04.080

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：

Hydrogen storage systems based on metal hydrides require appropriate quantitative kinetic description for simulations and designs, in particular for the crucial absorption process. This investigation proposes an empirical kinetic model for the hydrogen absorption of sodium alanate material doped with aluminium-reduced TiCl4, produced in kg-scale. The model is based on kinetic data obtained by volumetric titration measurements performed on each of the two absorption steps of sodium alanate, within a range of experimental conditions varying from 10 bar to 110 bar and from 100 degrees C to 180 degrees C. It is shown that each step is best described by the JMA model with n = 1.33. The kinetic equations are implemented in a mass balance and used to predict the reaction rate of the two steps of hydrogen absorption. Even when they proceed simultaneously, the predictions agree well with experimental results. The second paper of this investigation presents the results for the kinetic model of the corresponding hydrogen desorption. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.

引用

页码：6763 / 6772

页数：10

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