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Proceedings Paper

Promotion of hydrogen production by resonant excitation of vibrational levels using spectrally controlled thermal radiation
Author(s): Yuriko Maegami; Takashi Sasaki; Fumitada Iguchi; Hiroo Yugami
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Paper Abstract

The surface grating technologies enable to control the thermal radiation spectrum. We are applying this technique to promote the chemical reaction to produce hydrogen in the methane steam reforming process by spectrally resonant thermal radiation. The thermal radiation spectrum is adjusted to vibrational absorption bands of methane and water molecules near 3 μm by making a two-dimensional surface grating of period Λ=2.6 μm on the radiative surface. By matching the peak of thermal radiation to the absorption bands of gases, it is clearly observed that the hydrogen production is promoted five times as much as the case without spectrally resonant thermal radiation by the optical excitation of vibrational energy levels of molecules. From a series of experiments and analysis, it is suggested that radiative gas effectively excited the molecules up of high energy vibrational and rotational levels, and this lead to the high production rate of hydrogen in methane steam reforming process.

Paper Details

Date Published: 9 September 2008
PDF: 9 pages
Proc. SPIE 7044, Solar Hydrogen and Nanotechnology III, 70440P (9 September 2008); doi: 10.1117/12.794775
Show Author Affiliations
Yuriko Maegami, Tohoku Univ. (Japan)
Takashi Sasaki, Tohoku Univ. (Japan)
Fumitada Iguchi, Tohoku Univ. (Japan)
Hiroo Yugami, Tohoku Univ. (Japan)

Published in SPIE Proceedings Vol. 7044:
Solar Hydrogen and Nanotechnology III
Gunnar Westin, Editor(s)

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