Tomohiro Yadai
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Tomohiro Yadai has a total of 5 co-authors. Here are the top co-authors by number of shared publications:
- Hiroshi Yamamura
Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
1 shared publication - Kensuke Nishioka
University of Miyazaki
1 shared publication - Pyae Pyae Shwe Sin
Faculty of Engineering, University of Miyazaki, Miyazaki 889-2192, Japan
1 shared publication - Yasuyuki Ota
GX Research Center, University of Miyazaki, Miyazaki 889-2192, Japan
1 shared publication - Yoshihiro Suzuki
Department of Civil and Environmental Engineering, Faculty of Engineering, University of Miyazaki, Miyazaki, Japan
1 shared publication
Latest Publications
- Open Access
- 9 March 2026
- Published by MDPI AG in Applied Sciences
- Vol. 16 (5) , 2622
Effect of Water Quality Produced at Each Stage of the Seawater Desalination Process on Hydrogen Production in Water Electrolysis
Hydrogen production via water electrolysis using desalinated seawater offers a sustainable energy solution and has attracted considerable attention in recent years. However, its efficiency depends heavily on the quality of water. Many studies have not explored the relationship between treated water quality and hydrogen generation efficiency at each stage of the seawater desalination process. This study examines a three-step seawater desalination process comprising softening with ballasted flocculation (SBF) as a pretreatment, reverse osmosis (RO) as the main desalination step, and ion exchange as a polishing step to provide high-quality water for electrolysis. Water from each purification stage was supplied to the electrolyzer to compare the impact on water quality and hydrogen generation efficiency. The SBF process removed magnesium (Mg) and calcium (Ca) from seawater, as well as turbidity and bacteria, but hydrogen production via water electrolysis continued for no more than 10 h. However, when feeding RO water and RO water processed by ion exchange after the SBF process, hydrogen was generated stably and continuously for 70 h, achieving high efficiency comparable to that of commercial pure water. High production of green hydrogen by water electrolysis is possible through RO seawater desalination combined with SBF pretreatment.
- 9 March 2026
- Published by MDPI AG in Applied Sciences
- Vol. 16 (5) , 2622
Open AccessEffect of Water Quality Produced at Each Stage of the Seawater Desalination Process on Hydrogen Production in Water Electrolysis
Hydrogen production via water electrolysis using desalinated seawater offers a sustainable energy solution and has attracted considerable attention in recent years. However, its efficiency depends heavily on the quality of water. Many studies have not explored the relationship between treated water quality and hydrogen generation efficiency at each stage of the seawater desalination process. This study examines a three-step seawater desalination process comprising softening with ballasted flocculation (SBF) as a pretreatment, reverse osmosis (RO) as the main desalination step, and ion exchange as a polishing step to provide high-quality water for electrolysis. Water from each purification stage was supplied to the electrolyzer to compare the impact on water quality and hydrogen generation efficiency. The SBF process removed magnesium (Mg) and calcium (Ca) from seawater, as well as turbidity and bacteria, but hydrogen production via water electrolysis continued for no more than 10 h. However, when feeding RO water and RO water processed by ion exchange after the SBF process, hydrogen was generated stably and continuously for 70 h, achieving high efficiency comparable to that of commercial pure water. High production of green hydrogen by water electrolysis is possible through RO seawater desalination combined with SBF pretreatment.