ProtoCem: Zero Emissions Cement Manufacturing

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Portland cement concrete is the most widely used man-made material in the world and its production is responsible for 8% of all industrial carbon dioxide emissions. Hence it is of paramount importance to reduce these emissions to avoid the disastrous effects of climate change. The traditional process of cement manufacturing involves the use of fossil fuels to process limestone which generates large amounts of greenhouse gases. Using electricity from renewable sources like solar and wind, it is possible to convert limestone into calcium hydroxide in a device called an electrolyzer. In the further stages of processing, the use of calcium hydroxide completely eliminates CO2 emissions. The electrolyzer also generates high-value gases like hydrogen and other hydrocarbons which are widely used in industry. This technology has tremendous potential to transform cement and chemical manufacturing into a carbon-free, zero-emissions industry.