Dissertation/Thesis Abstract

Use of the aluminum gallium indium tin system for energy storage and conversion
by Ziebarth, Jeffrey Thomas, Ph.D., Purdue University, 2010, 105; 3417965
Abstract (Summary)

The water-reactivity of Al-Ga and Al-Ga-In-Sn alloys is investigated as a means to utilize the chemical potential energy of Al to generate H2 and heat. Bulk quantities of these alloys participate in a heterogeneous reaction with water to produce H2 and α-Al(OH)3 (bayerite) as confirmed by gas chromatography and X-ray diffractometry, respectively. Experiments suggest the reaction is enabled by a mechanism involving multiple alloy phases, where Al solvated in a liquid phase is transported to an interface between the alloy and water resulting in the Al being consumed by reaction. Differential scanning calorimetry indicates that for the Al-Ga-In-Sn quaternary system, the temperature at which this reaction-enabling phase liquefies is 9.38°C. H2 yield data is collected from the reaction of 50 wt% Al-34 wt% Ga-11 wt% In-5 wt% Sn alloys with water and analyzed with respect to time and temperature. Samples of this composition produced an average H 2 yield of 83.8%. A fit to the data using fractional order kinetic analysis establishes the activation energy for the rate-limiting step to be 43.8 kJ/mol.

Indexing (document details)
Advisor: Woodall, Jerry M.
Commitee: Franses, Elias I., Handwerker, Carol A., Sands, Timothy D.
School: Purdue University
Department: Electrical and Computer Engineering
School Location: United States -- Indiana
Source: DAI-B 71/09, Dissertation Abstracts International
Subjects: Analytical chemistry, Electrical engineering, Materials science
Keywords: Aluminum, Energy storage, Gallium, Hydrogen, Liquid phase, Water
Publication Number: 3417965
ISBN: 978-1-124-15759-7
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