Reaction mechanism of various types of lunar soil simulants by hydrogen reduction

Katsuya Sueyoshi, Takayuki Watanabe, Yoshio Nakano, Hiroshi Kanamori, Shigeru Aoki, Akira Miyahara, Kai Matsui

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

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.

Original languageEnglish
Title of host publicationEarth and Space Conference 2008
Subtitle of host publicationProceedings of the 11th Aerospace Division International Conference on Engineering, Science, Construction, and Operations in Challenging Environments
PublisherASCE - American Society of Civil Engineers
ISBN (Print)9780784409886
DOIs
Publication statusPublished - 2008
Externally publishedYes
EventEarth and Space Conference 2008: Proceedings of the 11th Aerospace Division International Conference on Engineering, Science, Construction, and Operations in Challenging Environments - Long Beach, CA, United States
Duration: Mar 3 2008Mar 5 2008

Publication series

NameEarth and Space Conference 2008: Proceedings of the 11th Aerospace Division International Conference on Engineering, Science, Construction, and Operations in Challenging Environments
Volume323

Other

OtherEarth and Space Conference 2008: Proceedings of the 11th Aerospace Division International Conference on Engineering, Science, Construction, and Operations in Challenging Environments
CountryUnited States
CityLong Beach, CA
Period3/3/083/5/08

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Environmental Engineering

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    Sueyoshi, K., Watanabe, T., Nakano, Y., Kanamori, H., Aoki, S., Miyahara, A., & Matsui, K. (2008). Reaction mechanism of various types of lunar soil simulants by hydrogen reduction. In Earth and Space Conference 2008: Proceedings of the 11th Aerospace Division International Conference on Engineering, Science, Construction, and Operations in Challenging Environments (Earth and Space Conference 2008: Proceedings of the 11th Aerospace Division International Conference on Engineering, Science, Construction, and Operations in Challenging Environments; Vol. 323). ASCE - American Society of Civil Engineers. https://doi.org/10.1061/40988(323)134