Water electrolysis systems produce oxygen in addition to hydrogen

As is well known, to achieve a carbon-free society Japan also plans to introduce mass quantities of renewable electrical power. (The Green Growth Strategy calls for 50% to 60% of electrical power to be from renewable energy by 2050.) As renewable electrical power increases, a buffer to absorb load fluctuations is essential. The storage of surplus electrical energy as hydrogen is one possible buffer. The number of water electrolysis systems installed to produce hydrogen from surplus electrical power is expected to increase. Small industrial hydrogen generators with a capacity of 100 Nm3/h or lower are already in actual use, and large units with a capacity of 1,000 Nm3 and higher designed for power storage are being aggressively developed in Japan as well as overseas.
(The Gas Review No. 499)

21 Apr. 2021

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