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To decompose chemically by means of an electric current.
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"The standard process of making hydrogen from water through electrolysis is 50 percent efficient," he says, "but if you electrolyze water that is already at high temperature and high pressure, that greatly improves efficiency."
In the end, the central question with hydrogen is whether it is made using renewable energy to electrolyze water, or with climate-disrupting fossil fuels.
Haldane proposed using electricity from windmills to electrolyze water when the wind spun out surplus power.
The company noted that the development effort is part of a Defense Advanced Research Projects Agency (DARPA) "Water Rocket" program, which "applies [PES'] technology to advanced space propulsion and energy systems." PES said it completed the first phase of the contract earlier this year, "demonstrating the ability to electrolyze water to generate hydrogen and oxygen gases at pressures exceeding 3,000 [pounds per square inch]."
Futurists visualize power stations where wind or solar energy are used to generate electric energy, which is then used to electrolyze water and produce hydrogen that could be stored and used by fuel cells to generate electric energy when needed, eliminating the need for other backup sources.
Cheap electricity produced from wind can be used to electrolyze water, producing hydrogen, now widely viewed as the fuel of the future.
Electricity generated at the Yokohama City Wind Power Plant (Hama Wing) will be used to electrolyze hydrogen that is compressed, stored, and then transported in a hydrogen fueling truck to four sites: a factory, a vegetable and fruit market, and two warehouses.