A breakthrough in concentrated solar power - and potentially for industrial green energy -was claimed last November from an unexpected source. A hitherto unknown company, Heliogen, announced its arrival with the revelation that it had been able to concentrate solar energy to achieve a temperature of over 1000°C, on a commercial scale, for the first time. This, the company claimed, meant it could replace fossil fuels in critical industrial processes such as cement, steel or aluminium manufacture, and potentially for thermally splitting water to produce hydrogen.
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