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MAGNESIUM BASED FOAMS FOR HYDROGEN STORAGE PowerPoint Presentation
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MAGNESIUM BASED FOAMS FOR HYDROGEN STORAGE

MAGNESIUM BASED FOAMS FOR HYDROGEN STORAGE

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MAGNESIUM BASED FOAMS FOR HYDROGEN STORAGE

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  1. 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.

  2. 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 J. Omar Gil Posada

  3. J. Omar Gil Posada

  4. 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. J. Omar Gil Posada

  5. Outline • Metallic foams. • Experimental. • Results. • Conclusions. • References. • Questions. SANS. HP-DSC. Mass Spectroscopy. J. Omar Gil Posada

  6. Metallic Foams Figure 1. Metallic foams J. Omar Gil Posada

  7. Mg+F.A. (Cr2CO3, CaH2 or ZrH2) Mixing Casting Baking Cooling Product 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. J. Omar Gil Posada

  8. Results Figure 3. Sample appearance before and after heat treatment. J. Omar Gil Posada

  9. Figure 4. SANS intensities from Mg + 0.956% ZrH2 after H2 adsorption. J. Omar Gil Posada

  10. Figure 5. HP-DSC of Mg + 10.36 % CaH2 under 30 Bar of Hydrogen in HP-DSC. J. Omar Gil Posada

  11. M=1 M=18 M=2 Figure 6. Mass spectra (M= 1, 2 and 18) for Mg + 0.006 %m Cs2CO3 + 0.002%m Ni.. J. Omar Gil Posada

  12. 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. J. Omar Gil Posada

  13. 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/hottopics/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. J. Omar Gil Posada

  14. Questions J. Omar Gil Posada