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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.
Yuriko Maegami,Takashi Sasaki,Fumitada Iguchi, andHiroo Yugami
"Promotion of hydrogen production by resonant excitation of vibrational levels using spectrally controlled thermal radiation", Proc. SPIE 7044, Solar Hydrogen and Nanotechnology III, 70440P (9 September 2008); https://doi.org/10.1117/12.794775
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Yuriko Maegami, Takashi Sasaki, Fumitada Iguchi, Hiroo Yugami, "Promotion of hydrogen production by resonant excitation of vibrational levels using spectrally controlled thermal radiation," Proc. SPIE 7044, Solar Hydrogen and Nanotechnology III, 70440P (9 September 2008); https://doi.org/10.1117/12.794775