heat

New carbon capture method turns up the heat

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A centuries-old technique for making cement may be the key to large-scale carbon capture, according to US chemists. The first step in making cement involves converting limestone to calcium oxide, inside a kiln heated to 1400 degrees Celsius. Calcium oxide is then mixed with sand to produce a vital ingredient for cement. Inspired by this … Read more

An aerospace expert on NASA’s Orion crew capsule heat shield issues during Artemis I

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As this illustration of the Apollo VIII command module reentering Earth shows, heat shields protect the crew capsule from high temperatures. Credit: NASA Johnson Space Center Off the coast of Baja California in December 2022, sun sparkled over the rippling sea as waves sloshed around the USS Portland dock ship. Navy officials on the deck … Read more