My Climate Journey

Decarbonizing Cement with alcemy's Software

08.03.2023 - By Jason Jacobs, Cody Simms, Yin LuPlay

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Leopold Spenner is CEO and Co-founder of alcemy, which is accelerating the decarbonization of cement and concrete via software.

Concrete is one of the most abundant manmade materials on earth, and it's exceedingly hard to decarbonize. Most of its emissions footprint comes from the production of cement, the materials that provide concrete with its strength. By most estimates, cement is responsible for upwards of 8% of global emissions. Cement production generates emissions in two major ways. One is from a chemical reaction during the cracking of limestone that's used to produce cement. And the other is from the extreme heat that this process requires.

Many cement plants around the world have begun employing carbon capture technologies on premises to get to net-zero. Beyond that, there are companies working to lower cement emissions by changing the ingredients mix or by trying to take away the need for extreme heat. It's a hard problem, but alcemy introduces another possible solution: efficiency. Their software helps cement and ready-made concrete producers to create product more efficiently, which should result in less waste and in less limestone that needs to be heated and cracked. Enjoy the show!

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