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Sign upDecember 13, 2020
CEMEX S.A.B. de C.V.
Zurich
Global cement producer CEMEX partnered with solar start-up Synhelion SA to demonstrate the world’s first emissions-free cement production. Synhelion is a solar research spin-off from ETH that uses an advanced concentrated solar thermal (CST) technology to generate temperatures at up to 1,500C for thermochemistry and industrial heat. For the first time, the technology will be applied to cement production, replacing fossil energy and eliminating carbon dioxide emissions from cement manufacturing – which is responsible for about 8 percent of the world’s annual emissions of CO2.
Powering the world’s existing cement production with renewable electricity would contribute to a significant reduction in emissions, potentially cutting them by about a third. However, this approach would not be enough to fully address the environmental impact of cement manufacturing, as a large portion of the emissions—about two-thirds—arise from the chemical process of limestone calcination.
Solar fuels are synthetic fuels produced from solar energy. They are climate-friendly, renewable, and affordable. A cutting-edge technology that offers a truly sustainable alternative to fossil fuels. Synhelion is on a mission to replace fossil fuels by economically viable synthetic fuels. The solution uses high-temperature solar heat to convert water and CO2 into synthetic fuels; so-called solar fuels. These fuels are compatible with the current global fuel infrastructure and reduce net CO2 emissions by up to 100%. The technology combines state-of-the-art solar tower systems with proprietary high-temperature thermochemical processes for the production of solar fuels.
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