Статья

Ultra-fast green hydrogen production from municipal wastewater by an integrated forward osmosis-alkaline water electrolysis system

Gabriela Scheibel CassolDepartment of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR, ChinaChii ShangDepartment of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR, ChinaAlicia Kyoungjin AnSchool of Energy and Environment, City University of Hong Kong, Hong Kong SAR, ChinaNoman Khalid KhanzadaNYUAD Water Research Center, New York University Abu Dhabi, Abu Dhabi, United Arab EmiratesFrancesco CiucciChair of Electrode Design for Electrochemical Energy Systems, University of Bayreuth, Bayreuth, GermanyAlessandro ManzottiDepartment of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR, ChinaPaul WesterhoffNanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, School of Sustainable Engineering and The Built Environment, Arizona State University, Tempe, AZ, USAYinghao SongDepartment of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong SAR, China. [email protected]Li LingAdvanced Interdisciplinary Institute of Environment and Ecology, Beijing Normal University, Zhuhai, China. [email protected]

2024en

ABI

Аннотация

Abstract Recent advancements in membrane-assisted seawater electrolysis powered by renewable energy offer a sustainable path to green hydrogen production. However, its large-scale implementation faces challenges due to slow power-to-hydrogen (P2H) conversion rates. Here we report a modular forward osmosis-water splitting (FOWS) system that integrates a thin-film composite FO membrane for water extraction with alkaline water electrolysis (AWE), denoted as FOWS AWE . This system generates high-purity hydrogen directly from wastewater at a rate of 448 Nm 3 day −1 m − 2 of membrane area, over 14 times faster than the state-of-the-art practice, with specific energy consumption as low as 3.96 kWh Nm −3 . The rapid hydrogen production rate results from the utilisation of 1 M potassium hydroxide as a draw solution to extract water from wastewater, and as the electrolyte of AWE to split water and produce hydrogen. The current system enables this through the use of a potassium hydroxide-tolerant and hydrophilic FO membrane. The established water-hydrogen balance model can be applied to design modular FO and AWE units to meet demands at various scales, from households to cities, and from different water sources. The FOWS AWE system is a sustainable and an economical approach for producing hydrogen at a record-high rate directly from wastewater, marking a significant leap in P2H practice.

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Идентификаторы

DOI: 10.1038/s41467-024-46964-8

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar