Making Cement From Electricity Slashes Carbon Emissions
Cement is traditionally made by crushing raw materials such as limestone and clay and mixing them with iron and fly ash. Then the mixture gets put into a kiln that heats the mixture to 2,700° F. There are two sources of carbon dioxide that result. First, the chemical reaction that takes place inside the kiln emits large quantities of it. Second, burning fossil fuels to heat the kiln also releases lots of the stuff.and he assigned Ellis to explore the possibilities.
Ellis said she didn’t know much about cement when Chiang asked her to focus on how to make low-carbon cement. She started by readingand textbooks. Then she worked with another Ph.D. student doing research that was later published in scientific journal articles on the topic. That led to the concept for what Sublime is doing now, and she’s continued to refine that concept ever since. “And basically just haven’t stopped,” Ellis toldChemistry can be used to effect change, Ellis said.
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