Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (4): 796.

• Articles • Previous Articles     Next Articles

Effect of TiF3 on the Dehydrogenation of LiAlH4

LIU Shu-Sheng1,2, SUN Li-Xian1*, SONG Li-Fang1,2, JIANG Chun-Hong1,2, ZHANG Jian1, ZHANG Yao1, XU Fen3*, ZHANG Zhi-Heng4   

  1. 1. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;
    2. Graduate School of the Chinese Academy of Sciences, Beijing 100049, China;
    3. Chemistry and Chemical Engineering School, Liaoning Normal University, Dalian 116029, China;
    4. PetroChina Pipeline R & D Center, Langfang 065000, China
  • Received:2009-06-15 Online:2010-04-10 Published:2010-04-10
  • Contact: SUN Li-Xian. E-mail: lxsun@dicp.ac.cn; XU Fen. E-mail: xufen@lnnu.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 20833009, 20873148, 50671098 和U0734005)、国家“八六三”计划项目(批准号: 2007AA05Z115, 2007AA05Z102)、国家“九七三”计划项目(批准号: 2010CB631303)和国际纯粹应应用化学联合会项目(批准号: 2008-006-3-100)资助.

Abstract:

The dehydrogenation performances of as-received, ball-milled and different amounts of TiF3 doped LiAlH4 were investigated by X-ray diffraction(XRD), Fourier transformed infrared spectrometer(FTIR) and thermogravimetry(TG) measurements. It was found that LiAlH4 decomposes a little during ball milling in the presence of TiF3. TiF3 has dramatically catalyzed the dehydrogenation of LiAlH4. With increasing amount of TiF3, the initial temperature of dehydrogenation decreases to some extent, but it sacrifices the dehydrogenation amount at great cost. 2%(molar fraction) TiF3-doped LiAlH4 begins to release H2 at 80 ℃, 70 ℃ lower than as-received LiAlH4, and can release as much as 6.6%(mass fraction) H2.

Key words: TiF3; LiAlH4; Dehydrogenation; Catalyze

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