Effect of Si content on H2 production using Al-Si alloy powders

被引：26

作者：

Yoo, Ho-Sik ^{[1
,2
]}

Ryu, Hong-Youl ^{[3
]}

Cho, Seong-Seock ^{[1
,3
]}

Han, Moon-Hee ^{[3
]}

Bae, Kie-Seo ^{[4
]}

Lee, Jong-Hyeon ^{[1
,3
]}

机构：

[1] Chungnam Natl Univ, Grad Sch, Dept Met Engn, Taejon, South Korea

[2] Korea Inst Nucl Nonproliferat & Control, Taejon, South Korea

[3] Chungnam Natl Univ, Grad Sch Green Energy Technol, Taejon, South Korea

[4] Chungnam Natl Univ, Dept Adv Organ Mat & Text Syst Engn, Taejon, South Korea

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2011年 / 36卷 / 23期

关键词：

Al-Si alloy; Hydrogen generation; Centrifugal atomizer; HYDROGEN GENERATION; ALUMINUM;

D O I：

10.1016/j.ijhydene.2011.08.061

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 effect of Si content in Al-Si alloy powder with NaOH on H-2 production was investigated. The total amount of H-2 produced decreased as Si content increased, which is inconsistent with the results predicted by the chemical reaction. Si caused a delay in the rate of H-2 production. Energy dispersive spectrometry showed that a large amount of unreacted Si remained in the matrix, and the unreacted fraction increased as the Si content increased. As the evolution reaction of Al and Al-Si alloys is exothermic, the temperature of all the specimens increased. Si addition reduced the hydroxide removal rate, which decreased the average H-2 production rate. The initiation time for H-2 evolution depends on the elimination rate of the oxide film formed during production of the powder. On increasing the Si content, SiO2 was formed, which is harder to eliminate than Al2O3; this delayed the initiation. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：15111 / 15118

页数：8

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