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Wang J, Ebner AD, Ritter JA. Physiochemical pathway for cyclic dehydrogenation and rehydrogenation of LiAlH4. J Am Chem Soc. 2006;128(17):5949-54doi: 10.1021/ja060045l.
Wang, J., Ebner, A. D., & Ritter, J. A. (2006). Physiochemical pathway for cyclic dehydrogenation and rehydrogenation of LiAlH4. Journal of the American Chemical Society, 128(17), 5949-54. https://doi.org/10.1021/ja060045l
Wang, Jun, et al. "Physiochemical pathway for cyclic dehydrogenation and rehydrogenation of LiAlH4." Journal of the American Chemical Society vol. 128,17 (2006): 5949-54. doi: https://doi.org/10.1021/ja060045l
Wang J, Ebner AD, Ritter JA. Physiochemical pathway for cyclic dehydrogenation and rehydrogenation of LiAlH4. J Am Chem Soc. 2006 May 03;128(17):5949-54. doi: 10.1021/ja060045l. PMID: 16637663.
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J Am Chem Soc. 2006 May 03;128(17):5949-54. doi: 10.1021/ja060045l.

Physiochemical pathway for cyclic dehydrogenation and rehydrogenation of LiAlH4.

Journal of the American Chemical Society

Jun Wang, Armin D Ebner, James A Ritter

Affiliations

  1. Department of Chemical Engineering, Swearingen Engineering Center, University of South Carolina, Columbia, South Carolina 29208, USA.

PMID: 16637663 DOI: 10.1021/ja060045l

Abstract

A five-step physiochemical pathway for the cyclic dehydrogenation and rehydrogenation of LiAlH4 from Li3AlH6, LiH, and Al was developed. The LiAlH4 produced by this physiochemical route exhibited excellent dehydrogenation kinetics in the 80-100 degrees C range, providing about 4 wt % hydrogen. The decomposed LiAlH4 was also fully rehydrogenated through the physiochemical pathway using tetrahydrofuran (THF). The enthalpy change associated with the formation of a LiAlH4.4THF adduct in THF played the essential role in fostering this rehydrogenation from the Li3AlH6, LiH, and Al dehydrogenation products. The kinetics of rehydrogenation was also significantly improved by adding Ti as a catalyst and by mechanochemical treatment, with the decomposition products readily converting into LiAlH4 at ambient temperature and pressures of 4.5-97.5 bar.

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