MAGNESIUM BASED FOAMS FOR

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MAGNESIUM BASED FOAMS FOR HYDROGEN STORAGE
By J. Omar Gil Posada Supervisor Professor
Peter J. Hall
Chemical and Process Engineering Department.
University of Strathclyde James Weir Building, 75
Montrose Street, Glasgow G1 1XJ Scotland.
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Introduction
Hydrogen Today hydrogen is used primarily as a
chemical precursor to produce different
compounds but hydrogen has the potential to be a
clean fuel.
At STP 1g H2 occupy almost 11L
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Aim
The hydrogen adsorption and desorption on
magnesium based foams prepared by solid phase
were evaluated as a function of the foaming
agent (ZrH2, Cs2CO3 and CaH2) and its composition
in the sample.
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Outline

• Metallic foams.
• Experimental.
• Results.
• Conclusions.
• References.
• Questions.

SANS. HP-DSC. Mass Spectroscopy.
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Metallic Foams
Figure 1. Metallic foams
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Experimental
Magnesium powder was mixed at different
compositions with several foaming agents, the
final sample was tested for hydrogen adsorption
and desorption.
t
T2
T1
Figure 2. Magnesium foam production.
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Results
Figure 3. Sample appearance before and after
heat treatment.
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Figure 4. SANS intensities from Mg 0.956
ZrH2 after H2 adsorption.
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Figure 5. HP-DSC of Mg 10.36 CaH2 under 30
Bar of Hydrogen in HP-DSC.
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M1
M18
M2
Figure 6. Mass spectra (M 1, 2 and 18) for Mg
0.006 m Cs2CO3 0.002m Ni..
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Conclusions

• The system Mg Cs2CO3 shows the best hydrogen
  sorption properties compared with the other
  systems.
• After several runs the magnesium based foams keep
  their sorption properties, this does not happen
  with pure magnesium samples.
• The magnesium samples seem to have occluded
  porosity.
• It was found that Ni increases the amount of
  hydrogen adsorbed.

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References
1 Karl J. Gross, Peter Spatz, Andreas Züttel,
Louis Schlapbach. Mechanically milled Mg
composites for hydrogen storage The transition
to a steady state composition Journal of
Alloys and Compounds. 240 (1996) 206-213. 2
Hydrogen Storage home page. http//www.csa.com/ho
ttopics/hydrogen/overview.html 3 Gary
Sandrock. A panoramic overview of hydrogen
storage alloys from a gas reaction point of
view Journal of Alloys and Compounds. 293-295
(1999) 877-888.
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Questions
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