Carbon Chemist

Tag: carbon dioxide removal

  • This startup is removing carbon from a polluted New York City river

    This startup is removing carbon from a polluted New York City river

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    New York City’s East river is polluted and contains higher than average levels of carbon dioxide

    Ed Rooney/Alamy

    On 14 November, I toured a shipping container bristling with tubes and wires, perched beside New York City’s East river. It is the test site of a start-up called Vycarb, which recently began adding crushed rocks and other chemicals to the water to remove carbon dioxide from the atmosphere.

    On one side of the container, an hourglass-like device mixed a fine stream of calcium carbonate mineral powder with water pumped from below. This alkaline, grey-green slurry was then released into an…

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  • Crushed rocks outpace giant fans in race to remove CO2 from air

    Crushed rocks outpace giant fans in race to remove CO2 from air

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    Spreading crushed basalt rock dust on fields

    UNDO

    Projects that spread rock dust on farms are removing more carbon dioxide from the atmosphere than competing technologies – but CO2 removal efforts remain far short of what is needed to avoid dangerous levels of global warming.

    Known as enhanced rock weathering, the method involves spreading crushed volcanic rocks over fields to accelerate the natural weathering process by which CO2 in the atmosphere is converted to stable mineral form. Spurred by its relative simplicity – and new evidence that the rock dust can improve crop yields as well as sequester carbon – this…

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