Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 36, Issue 1, Pages 1200-1205Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2010.07.003
Keywords
LiBH4; MgH2; Catalyst; Hydrogen storage
Categories
Funding
- National Science and Technology Development Agency
- Royal Jubilee Ph.D. Program [PHD/0249/2549]
- Thailand Research Fund
- Petroleum and Petrochemical College (PPC)
- Research Unit for Petrochemical and Environment Catalysis, Ratchadapisak Somphot Endowment
- Center for Petroleum, Petrochemicals, and Advanced Materials, Chulalongkorn University
- UOP, A Honeywell Company, USA
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The hydrogen desorption/absorption of the 2:1 mole ratio of LiBH4 and MgH2 with and without a catalyst was investigated. In the case of the uncatalyzed LiBH4/MgH2 mixture, the first hydrogen desorption started at 50 degrees C. The amount of released hydrogen was 8.6 wt% at the first hydrogen desorption and dramatically reduced to 1.8 wt% at the tenth hydrogen desorption. The decrease in the hydrogen capacity in the subsequent hydrogen desorption may be due to the irreversibility of LiBH4. To investigate effects of a catalyst on the hydrogen desorption, 3 mol% of TiCl3, HfCl4, ZrCl4, or VCl3 was added to the LiBH4/MgH2 mixture. The lowest hydrogen desorption temperature, 260 degrees C, was from the sample with TiCl3. An amount of the catalyst also influenced the kinetics of the hydride mixture and 5 mol% seems to be an optimum amount of TiCl3 that resulted in the lowest hydrogen desorption temperature, 240 degrees C. In addition, the higher the amount of a catalyst, the lower the amount of the released hydrogen. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
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