Ireland-based Carbon Collect (formerly, Silicon Kingdom Holdings) develops direct air capture (DAC) technology that uses ambient wind to collect atmospheric air (as opposed to man-made fans used by other DAC methods). The company states that its proprietary passive DAC MechanicalTree technology is “thousands of times more efficient” compared to natural trees at capturing carbon dioxide (CO2) from the air.
The MechanicalTrees do not require an energy source for CO2 capture, unlike the need for fans and blowers in other DAC systems. The MechanicalTrees are column-shaped and are 10 meters tall; it contains sorbent tiles that extend and retract on a constant capture and regeneration cycle. They are planted in clusters of 12, with each cluster capturing one metric ton of CO2 per day on average. As of November 2021, the company planned to deploy MechanicalTrees at a pilot facility, capturing 100 metric tons of CO2 per day. In April 2022, Carbon Collect installed its first MechanicalTree at Arizona State University’s Tempe campus, and is expected to remove 90 kilograms of CO2 per day.
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