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

Pattaraporn Sridechprasat, Labhatrada Phuirot, Pramoch Rangsunvigit, Boonyarach Kitiyanan and Santi Kulprathipanja
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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
Boonyarach Kitiyanan: The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok 10330, Thailand
Santi Kulprathipanja: UOP, A Honeywell Company, 50 East Algonquin Rd., Des Plaines, IL 60017, USA

Energies, 2012, vol. 5, issue 9, 1-10

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.

Keywords: LiAlH 4; LiBH 4; hydrogen storage (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2012
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