A few days ago, the team of Dongfang Electric (Fujian) Innovation Research Institute Co., LTD. (referred to as "Dongfu Research Institute") successfully completed the field test of non-purification electrolysis hydrogen production of produced water in the Changqing Oilfield gas field of petrochina in Ordos, Inner Mongolia. During the test, the hydrogen production of the demonstration prototype reached the rated value, and the field measurement showed that the hydrogen purity reached 99.999%. This indicates that the in-situ direct electrolysis of seawater without desalination has been successfully applied in the field of industrial wastewater hydrogen production for the first time.

Dongfu Research Institute is a scientific and technological innovative enterprise jointly built by China Dongfang Electric Group Co., LTD., Fujian Province and Fuzhou City, mainly engaged in the research and development and industrialization of advanced new energy technologies such as offshore wind power, wave energy and hydrogen energy. Liu Taisheng, president of Dongfu Research Institute, introduced that the phased field test project of non-purification electrolysis hydrogen production of produced water in gas fields was jointly carried out by Dongfu Research Institute and petrochina Changqing Oilfield Oil and Gas Technology Research Institute, which is the first time that "seawater non-desalination in-situ direct electrolysis hydrogen production technology" has been applied to the field of industrial wastewater hydrogen production.

The project adopts in situ direct electrolysis hydrogen production technology of seawater without desalination to explore the expansion of direct hydrogen production technology of seawater to the field of energy conservation and environmental protection in the future, and provides a route reference for hydrogen production of petrochemical wastewater, steelmaking wastewater and other industrial wastewater. The results of in situ direct electrolysis hydrogen production technology without desalination of seawater were published by Academician Xie Heping's team in the journal Nature on November 30, 2022, and were rated as one of the top ten scientific advances in China in 2022 by the High-tech Research and Development Center of the Ministry of Science and Technology.

On December 16, 2022, Dongfang Electric Co., LTD., Dongfu Research Institute and Xie Heping, Academician of Sichuan University/Shenzhen University, jointly signed a four-party cooperation agreement on "pilot test and industrialization promotion and application of original technology for in-situ direct electrolysis hydrogen production of seawater without desalination". Dongfu Research Institute officially introduced the technology to Fujian and carried out the transformation of results.

On June 2, 2023, Dongfang Electric Group and Academician Xie Heping of Sichuan University/Shenzhen University jointly carried out the world's first offshore pilot test of non-desalinated seawater in-situ direct electrolysis hydrogen production technology for offshore wind power in Xinghua Bay offshore wind Farm in Fujian Province, and achieved success.

At present, Dongfu Research Institute is carrying out 100Nm3 H2/h large-scale equipment and system development, and actively promoting project demonstration. Liu Taisheng, executive director and general manager of Dongfu Research Institute, introduced that the in-situ direct electrolysis of seawater without desalination has broad application prospects. It can be combined with offshore wind power, offshore photovoltaic, oil drilling platforms, etc., to achieve the on-site consumption of green power such as far-reaching sea breeze electricity, achieve green hydrogen production, storage and supply, solve the problem that far-reaching sea breeze electricity is difficult to transmit back to the land, and significantly reduce wind power transmission, absorption costs and hydrogen production costs. And further on the spot conversion and production of green ammonia, green methanol and other high value-added chemical products, accelerate the comprehensive development and utilization of Marine renewable energy.

In China's inland areas, the technology can be used for hydrogen production of industrial wastewater such as gas field produced water, oil field produced water, thermal power plant desulfurization wastewater, and domestic sewage hydrogen production in the city, effectively reducing the cost of water treatment, realizing the value-added of hydrogen production, and contributing to green energy saving, environmental protection and sustainable development. In view of the situation of abundant scenery resources but scarce water resources in northwest China, the technology can make full use of local domestic production wastewater, brackish water, salt lake water and other hydrogen production, and solve the problem of clean energy consumption and utilization. With the growing market demand at home and abroad, the project results are expected to be widely used in more fields.

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