International Chemical Engineering Symposia Proceedings
Online ISSN : 2758-3031
IChES (International Chemical Engineering Symposia) 2022
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A Newly Developed Method of Direct Hydrogen Production from Seawater Using Femtosecond Pulse Laser
Yuki MIZUSHIMAAkira KUWAHARAMakoto MATSUITomoki KOZUKANobuyuki MASE
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会議録・要旨集 オープンアクセス

p. 24-26

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The direct production method of H2 gas from seawater using femtosecond pulse laser was developed. This approach uses the photolysis triggered by multiphoton absorption of H2O molecules and does not emit greenhouse or harmful gas such as CO2 and Cl2. In this study, direct H2 production from seawater without desalination was demonstrated, and influences of focusing lens and salinity on H2 production were experimentally revealed with a gas chromatograph. Aqueous solutions with moderate salinity (0.1-4%) showed a positive effect on H2 production owing to nonlinear optical effects by ultrashort laser pulses, while excessive salt (the salinity of 7.0%) interfered with the ionization of H2O.

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© 2022 The Author(s).

This is an open access article published under a CC BY-NC-ND license.
https://creativecommons.org/licenses/by-nc-nd/4.0/
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