Feasibility Study of Hydrogen Generation from the Milled Al-Based Materials for Micro Fuel Cell Applications

Hydrogen generation from hydrolysis of the milled Al materials in water at room temperature is investigated. The hydrolysis mechanism is based on the work of the microgalvanic cell, where AlOOH (Bohmite) and hydrogen are produced via consumption of Al and water. From the hydrolysis results, the Al−B...

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Bibliographic Details
Published in:Energy & fuels 2009-09, Vol.23 (9), p.4562-4566
Main Authors: Fan, Mei-qiang, Sun, Li-xian, Xu, Fen
Format: Article
Language:English
Subjects:
Hydrogen
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Summary:Hydrogen generation from hydrolysis of the milled Al materials in water at room temperature is investigated. The hydrolysis mechanism is based on the work of the microgalvanic cell, where AlOOH (Bohmite) and hydrogen are produced via consumption of Al and water. From the hydrolysis results, the Al−Bi-based materials have better hydrolysis properties than those of the Al−Sn-based materials. Approximately 1000 mL of H2 per gram of the Al−Bi-based materials can be generated, and the hydrogen generation rate can be achieved at 160 mL/g/min in the first five minutes of hydrolysis. The high reactivity of the Al−Bi materials come from the additives (Zn, hydrides, and salts) and can be achieved in 5 h of milling. Meanwhile, the feasibility of the CO2-free hydrogen from Al alloys for fuel cell applications is confirmed in our experiments, and the hydrogen generation can be controlled by feeding the water flow into the Al alloys.
ISSN:0887-0624
1520-5029
DOI:10.1021/ef9004169