Hydrogen production from solid reactions between MAlH4 and NH4Cl

被引：16

作者：

Zhang, Huajun ^{[1
]}

Loo, Yook Si ^{[1
]}

Geerlings, Hans ^{[2
,3
]}

Lin, Jianyi ^{[1
]}

Chin, Wee Shong ^{[4
]}

机构：

[1] ASTAR, Inst Chem & Engn Sci, Singapore 627833, Singapore

[2] Shell Global Solut Int BV, NL-1030 BN Amsterdam, Netherlands

[3] Delft Univ Technol, NL-2628 BL Delft, Netherlands

[4] Natl Univ Singapore, Dept Chem, Singapore 117543, Singapore

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2010年 / 35卷 / 01期

关键词：

Hydrogen production; Hydrogen storage; Chemical hydrogen storage; Solid state reaction; Alkali aluminum hydride; STORAGE PROPERTIES; THERMAL-DECOMPOSITION; LIALH4; NAALH4; TRANSFORMATIONS; ADDITIVES; HYDRIDE; SYSTEMS;

D O I：

10.1016/j.ijhydene.2009.10.070

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：

Solid reactions between alkali aluminum hydrides (MAlH4, M = Li or Na) and NH4Cl (at mole ratio 1:1) at 170 degrees C were investigated quantitatively using temperature programmed reaction (TPR), thermo-gravimetric analysis (TGA), differential scanning calorimetry (DSC) and x-ray diffraction (XRD). The release of 3 mol of H-2 from per mole of MAlH4 was measured, corresponding to 5.6 wt.% H-2 capacity for the NaAlH4/NH4Cl system and 6.6 wt.% for LiAlH4/NH4Cl, respectively. By ball milling of the precursor compounds prior to the mixing, the reaction proceeded fast and NH3 production as the by-product could be avoided. The quick solid reactions may be attributed to the low melting temperatures of MAlH4 and the exothermic nature of the reactions. The reaction mechanism was also discussed. (C) 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.

引用

页码：176 / 180

页数：5

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