Host: The Society of Chemical Engineers, Japan
Name : IChES (International Chemical Engineering Symposia) 2022
Date : March 16, 2022 - March 18, 2022
Pages 24-26
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.
