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SUMMARY:Hydrogen storage: hybrid materials\, properties & systems
DTSTART:20170426T110000
DTEND:20170426T120000
DTSTAMP:20260511T092537Z
UID:fd1caf30dd8c14214f9153618598cf8a09ca739c81f8bc90f9174a51
CATEGORIES:Conferences - Seminars
DESCRIPTION:Mohammad Faisal\nIndian Institute of Technology\nKanpur India\
 nMagnesium based hybrids have potential applications for hydrogen storage 
 in the solid state. Although magnesium can store a high amount of hydrogen
  (7.6 wt.%)\, high temperatures (∼300 °C) and pressures (0.3–1 MPa
 ) are required for the same. Additionally\, the kinetics of absorption of 
 hydrogen in bulk magnesium is slow. In the current work\, Mg-LaNi5-soot hy
 brids are synthesized by the accumulative roll bonding (ARB) process (30 r
 oll passes\, 50% reduction per pass). It is observed that the hybrid absor
 bs 5 wt.% hydrogen at 250 °C at a pressure of ∼0.33 MPa (4.5 wt.% h
 ydrogen at a plateau pressure of less than 0.08 MPa). After 30 ARB passes
 \, the kinetics of absorption of the hybrid was 4.0 wt.% hydrogen in 30 
 s at 2 MPa\, which is 3500% faster than the Mg (ARB) sample and 500% fast
 er than Mg-LaNi5 hybrid. This combination of operating parameters and enh
 anced hydrogen storage properties (high capacity at lower temperatures and
  pressures combined with rapid kinetics) offer exciting prospects towards 
 applications\, given that bulk samples can be synthesized in large quantit
 ies using the process developed. After 25 ARB passes there are more than 1
 05 layers in the hybrid and the layer thickness becomes less than ∼24 
 nm. Hence\, intimate mixing of the components of the hybrid\, along with a
  fine microstructure and increased defect density in the hybrid\, seems to
  play an important role in the enhancement of the hydrogen absorption prop
 erties.\n\nWe have dedicated our efforts towards the designing and fabrica
 tion of high temperature (~400 °C) metal hydride based hydrogen storage 
 and retrieval system (hydrogen storage canister) with novel core heating a
 ttachment for efficient heat transfer and faster kinetics as compared to e
 xternal heating. The material used for testing hydrogen storage canister i
 s Mg‑LaNi5-soot (30 ARB passes). The idea is to design and fabricate a w
 orking prototype which can store hydrogen (working as a hydrogen battery) 
 and provide hydrogen (on heating) when required. The performance of the me
 tal hydride based hydrogen storage reactor depends on many parameters. The
  most crucial role is played by the design of the hydrogen storage and ret
 rieval system.\nFor the first time we are investigating accumulatively rol
 l bonded Al-LaNi4.6Al0.4 hybrid for mechanical energy damping applications
 \n 
LOCATION:Zeuzier https://www.google.com/maps/place/EPFL+Valais+Wallis/?ref
 =zeuzier
STATUS:CONFIRMED
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