Chapter
Apr 26, 2012
Reaction Mechanism of Various Types of Lunar Soil Simulants by Hydrogen Reduction
Authors: Katsuya Sueyoshi, Takayuki Watanabe [email protected], Yoshio Nakano, Hiroshi Kanamori, Shigeru Aoki, Akira Miyahara, and Kai MatsuiAuthor Affiliations
Publication: Earth & Space 2008: Engineering, Science, Construction, and Operations in Challenging Environments
Abstract
Several processes to produce water and oxygen from lunar regolith have been proposed. Among these processes, hydrogen reduction process of lunar regolith has several advantages. Therefore, we have investigated the water-production mechanism by H2 reduction for three types of lunar soil simulants. The maximum of water-production was obtained for all lunar soil simulants at 1323 K. Mössbauer spectra of FJS-1 revealed that the produced water was generated from ilmenite, Fe3+ phase(s), and magnetic materials such as hematite or magnetite. The cross-section observation of scanning electron microscope and BET method presented that the surface area was decreased at higher temperature owing to melting of some components in the cracks, and the surface area was increased as the progress of hydrogen reduction. The kinetic consideration using thermogravimetry indicated that hydrogen reduction for lunar soil was controlled by chemical reaction.
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Published In
Earth & Space 2008: Engineering, Science, Construction, and Operations in Challenging Environments
Pages: 1 - 8
Copyright
© 2008 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
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Authors
Affiliations
Katsuya Sueyoshi
Dept. Environmental Chemistry and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, Kanagawa 226-8502, Japan
Dept. Environmental Chemistry and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, Kanagawa 226-8502, Japan. E-mail: [email protected]
Yoshio Nakano
Dept. Environmental Chemistry and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, Kanagawa 226-8502, Japan
Hiroshi Kanamori
Shimizu Corporation, Institute of Technology, 3-4-17 Etchujima, Koto-ku, Tokyo 135-8530, Japan
Shigeru Aoki
Shimizu Corporation, Institute of Technology, 3-4-17 Etchujima, Koto-ku, Tokyo 135-8530, Japan
Akira Miyahara
Japan Aerospace Exploration Agency, Institute of Space and Astronautical Science, 2-1-1 Sengen, Tsukuba, Ibaraki, 305-8505, Japan
Kai Matsui
Japan Aerospace Exploration Agency, Institute of Space and Astronautical Science, 2-1-1 Sengen, Tsukuba, Ibaraki, 305-8505, Japan
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