Shimizu Completes Low-Cost Green Hydrogen Demo Plant

Source: www.gulfoilandgas.com 7/28/2023, Location: Asia

Shimizu Corporation (President: Kazuyuki Inoue) announced today that it has completed demonstration plant to a low-cost method of green hydrogen generation in Kokonoe Town, Oita Prefecture. It had started construction last November. Ahead of the plant’s trial slated to begin in August, an opening ceremony will be held today at the site with 30 attendees, including Akira Tsukishima, Director of Kyushu Regional Environment Office, Ministry of Environment, Kazunari Yoshida, Deputy Governor of Oita Prefecture, and Yasushi Hino, Mayor of Kokonoe Town.

Shimizu was commissioned to build this demonstration plant as part of the Technology Development and Demonstration Project for Regional Symbiosis and Cross-Sectoral Carbon Neutrality run by the Ministry of Environment. The low-cost green hydrogen generation technology was developed in corroboration with Ichikawa Office Ltd. (Shinjuku-ku, Tokyo), Enecycle, Inc. (Osaki City, Miyagi), Dainichi Machine and Engineering Co., Ltd. (Yokohama City, Kanagawa), and HYDRONEXT Inc. (Oita City, Oita). The above method offers two key advantages: First, its energy sources, geothermal and biomass, are both plentiful in Japan. It will be tested with goal of carbon emissions produced during hydrogen generation are just a tenth of those produced in the generation of commercial (grey) hydrogen, while generation costs are just third of the costs of conventional methods for generating green hydrogen (such as by solar energy and water electrolysis).

The trial will involve 25-day continuous operation in three separate periods from August to December 2022. It will examine hydrogen generation at rate of 50Nm3 per hour and a purity 99.999% or higher using cedar chips as a biomass resource and geothermal steam. The trial will also verify the plant operates stable in terms of both quality and safety. The hydrogen generation cost that estimated by production efficiency, and CO2 emissions reduction rate will be calculated. The result will be reported to the Ministry of Environment in March 2023.

Shimizu plans to build on the findings of the demo and self-developed such demo plants built next to small or medium geothermal power stations. Commercial plants are expected to produce hydrogen at a rate of 250 -1,000 Nm3 per hour.


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