Startup plant größte Ozean-Geoengineering-Anlage | Die Anlage von Ebb Carbon könnte noch in diesem Jahr mit der CO2-Reduzierung beginnen

From the article: Californian start-up Ebb Carbon could start using seawater to remove hundreds of tonnes of carbon dioxide from the air as soon as this year, according to plans and permit applications filed with the city of Port Angeles in Washington state.

The carbon dioxide removal (CDR) pilot plant, code-named Project Macoma and not previously reported, will pump hundreds of thousands of liters of seawater every day into a series of tanks and shipping containers on shore. There, an electrochemical process will split the water into acidic and alkaline streams. The acidic stream will be either neutralized or shipped out in trucks, while the alkaline stream will be returned to the ocean via a floating barge.

That alkaline outflow would mix with C02 in the ambient seawater to create bicarbonate, which is a stable way to store carbon. With more CO2 locked away, the ocean would slowly seek equilibrium by drawing down CO2 gas from the air. In this way, the company claims it will remove at least 500 tonnes of CO2 per year from the atmosphere.

While that’s literally a drop in the ocean compared to the more than 2.5 trillion tonnes of excess carbon dioxide that humanity has released into the atmosphere since the Industrial Revolution, it’s five times the capacity of the largest marine CDR experiments to date. Ebb is currently testing a 100-tonne system at the Pacific Northwest National Laboratory in nearby Sequim, while rival start-ups Captura and Equatic have similarly sized electrochemical plants at the Port of Los Angeles in California. All plan to sell, or have already pre-sold, carbon removal credits from future facilities.