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A Revisit to the Hydrogen Desorption/Absorption Behaviors of LiAlH 4 /LiBH 4 : Effects of Catalysts

Author

Listed:
  • Pattaraporn Sridechprasat

    (The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand)

  • Labhatrada Phuirot

    (The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand)

  • Pramoch Rangsunvigit

    (The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand
    Center of Excellence for Petrochemical and Materials Technology, Chulalongkorn University, Bangkok 10330, Thailand)

  • Boonyarach Kitiyanan

    (The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand
    Center of Excellence for Petrochemical and Materials Technology, Chulalongkorn University, Bangkok 10330, Thailand)

  • Santi Kulprathipanja

    (UOP, A Honeywell Company, 50 East Algonquin Rd., Des Plaines, IL 60017, USA)

Abstract

The hydrogen desorption/absorption behaviors of LiAlH 4 /LiBH 4 with a focus on the effects of catalysts, namely TiCl 3 , TiO 2 , VCl 3 , and ZrCl 4 , were investigated using a thermal-volumetric apparatus. The hydrogen desorption was performed from room temperature to 300 °C with a heating rate of 2 °C min −1 . The LiAlH 4 –LiBH 4 mixture with a molar ratio of 2:1 decomposed between 100 and 220 °C, and the hydrogen desorption capacity reached up to 6.6 wt %. Doping 1 mol % of a catalyst to the mixture resulted in the two-step decomposition and a decrease in the hydrogen desorption temperature. All the doped samples provided lower amountz of desorbed hydrogen than that obtained from the undoped one. No hydrogen absorption was observed under 8.5 MPa of hydrogen pressure and 300 °C for 6 h. Despite the fact each of the catalysts may affect the hydrogen storage behaviors of the mixture differently, none resulted in a change in the sample reversibility.

Suggested Citation

  • Pattaraporn Sridechprasat & Labhatrada Phuirot & Pramoch Rangsunvigit & Boonyarach Kitiyanan & Santi Kulprathipanja, 2012. "A Revisit to the Hydrogen Desorption/Absorption Behaviors of LiAlH 4 /LiBH 4 : Effects of Catalysts," Energies, MDPI, vol. 5(9), pages 1-10, September.
    • Handle: RePEc:gam:jeners:v:5:y:2012:i:9:p:3691-3700:d:20246
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