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Molecular hydrogen carrier with activated nanohydride and ammonia

Published online by Cambridge University Press:  31 January 2011

Yoshitsugu Kojima ,
Kyoichi Tange ,
Satoshi Hino ,
Shigehito Isobe ,
Masami Tsubota ,
Kosei Nakamura ,
Masashi Nakatake ,
Hiroki Miyaoka ,
Hikaru Yamamoto  and
Takayuki Ichikawa
Yoshitsugu Kojima*
Affiliation:
Institute for Advanced Materials Research and Department of Quantum Matter, ADSM, Hiroshima University, Higashi-Hiroshima 739-8530, Japan
Satoshi Hino
Affiliation:
Department of Quantum Matter, ADSM, Hiroshima University, Higashi-Hiroshima 739-8530, Japan
Masami Tsubota
Affiliation:
Institute for Advanced Materials Research ADSM, Hiroshima University, Higashi-Hiroshima 739-8530, Japan
Kosei Nakamura
Affiliation:
Department of Quantum Matter, ADSM, Hiroshima University, Higashi-Hiroshima 739-8530, Japan
Masashi Nakatake
Affiliation:
Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
Hiroki Miyaoka
Affiliation:
Institute for Advanced Materials Research ADSM, Hiroshima University,Higashi-Hiroshima 739-8530, Japan
Hikaru Yamamoto
Affiliation:
Department of Quantum Matter, ADSM, Hiroshima University, Higashi-Hiroshima 739-8530, Japan
Takayuki Ichikawa
Affiliation:
Institute for Advanced Materials Research and Department of Quantum Matter, ADSM, Hiroshima University, Higashi-Hiroshima 739-8530, Japan
*
a) Address all correspondence to this author. e-mail: kojimay@hiroshima-u.ac.jp
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Abstract

We show a drastically improved gas–solid reaction between NH3 and LiH by mechanical treatment for LiH, generating a hydrogen gas even at room temperature. The results of x-ray photoelectron spectroscopy showed that the mechanical pretreatment was effective in reducing a hydroxide phase from the surface of LiH. It was also possible to successfully recycle back LiNH2, which is the byproduct of this hydrogen desorption reaction, to LiH under 0.5-MPa H2 flow at 573 K. Thus, the LiH–NH3 system provides a recyclable H2 storage system to generate H2 at room temperature with 8.1 mass% and 4.5 kg/100 L hydrogen capacity.

Keywords

HydrogenationReactive ball millingX-ray photoelectron spectroscopy (XPS)
Type
Outstanding Symposium Papers
Information
Journal of Materials Research , Volume 24 , Issue 7 , July 2009 , pp. 2185 - 2190
Copyright
Copyright © Materials Research Society 2009

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