A new concept for the global distribution of solar energy: energy carrying compounds
Rather than generate electricity at the African solar concentrators, says Müller’s group, engineers should direct the sunlight to reactors filled with limestone (CaCO3). At around 1000°C, the limestone would convert to quicklime (CaO) and CO2, which could be converted using other solar energy and hydrogen into useful fuel such as methane. Meanwhile, the lime could be transported over land and sea to European cities where, upon heating to 650°C in the presence of CO2 from local fossil fuel plants, it would reconvert to limestone with a massive release of heat. This heat would then boil water into steam to drive turbines, generating electricity on-site.