Eamon Keane Conference Presentation on Hydrogen from Aluminium Gallium

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Information about Eamon Keane Conference Presentation on Hydrogen from Aluminium Gallium
Business

Published on January 13, 2010

Author: cimon9999

Source: slideshare.net

Description

If you want to see why using aluminium as a vector to store energy for later reproduction of hydrogen is a terrible idea, then look no further.

Aluminium as a Fuel Aluminium Eamon Keane Co-Authors: Dr David Browne & Dr Alun Carr University College Dublin

Water + Aluminium-Gallium Fuel Pellets

Prof. Jerry Woodall, Purdue University Claims: Energy efficient – 50% recycling efficiency Environmentally sound Cheap – equivalent to $3/gallon for petrol Scalable (enough gallium for 1 billion cars) Reaction is: Gallium is inert in the reaction Can use variable wind power for electrolysis View slide

Energy efficient – 50% recycling efficiency

Environmentally sound

Cheap – equivalent to $3/gallon for petrol

Scalable (enough gallium for 1 billion cars)

Reaction is:

Gallium is inert in the reaction

Can use variable wind power for electrolysis

= 1L 2.2L View slide

energy trapped

+ = + Water Hydrogen on Demand Aluminium Hydroxide

Aluminium Fuel Cycle Inputs

Calcining Smelting Aluminium Fuel Cycle 13.5% energy efficiency, not 50% Aluminium Hydroxide Alumina

Energy and CO 2 Per Km Travelled

Pourbaix Diagram

Aluminium-Gallium Phase Diagram 33um Pure gallium in grain boundaries, β phase α phase: solid solution

Fuel Pellet The Reaction Gallium is not inert in the reaction

Standard Electrode Potential Large difference, galvanic corrosion expected. Reaction Mechanism Element E°V (V) Lithium -3.04 Aluminium -1.66 Gallium -0.56 Hydrogen 0 Gold +0.80



Surface After Reaction



Gallium Production Enough for ~ 30,000 cars – not 1 billion!

Elements with very low worldwide 2008 production (Up to ~ 10,000 tons)

Aluminium as a Fuel Aluminium Any Questions? Renewable ≠ Green

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