US 2023/0192543 A1

Systems and methods of carbon capture from cement production process

(22) 19.12.2022

(43) 22.06.2023

(57) Embodiments described herein relate to capturing and sequestering CO, emissions from the cement production process with the potential to produce carbon-negative cement. Methods described herein can include contacting calcium oxide (CaO) with ambient air at a carbonation station to form a first stream of calcium carbonate, combining the first stream of calcium carbonate with a second stream of calcium carbonate in a calciner to form a combined stream of calcium carbonate, and applying heat to the calciner to decompose the combined stream of calcium carbonate into a stream of calcium oxide and a CO, stream. The method further includes sequestering the CO, stream, dividing the stream of calcium oxide into a first calcium oxide stream and a second calcium oxide stream, feeding the first stream of calcium oxide to the carbonation station, and feeding the second stream of calcium oxide to a kiln to produce a clinker.

(71) Heirloom Carbon Technologies, Inc., San Francisco, CA (US)


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