An Electrifying Approach to Carbon Capture

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https://eos.org/articles/an-electrifying-approach-to-carbon-capture

By Bill Morris, Eos/AGU. 

Excerpt: ...a group of researchers at the University of Calgary is using electricity to enhance seawater’s ability to store carbon. The group is developing an instrument, dubbed PEACH (Practical Electrochemical Air Capture and Hydrogen), that uses an electrochemical cell, analogous to a lithium-ion battery, to capture alkaline sodium ions from salt water. ...arrays could be lowered more than 500 meters into the ocean to gather ions, then raised to release them as sodium hydroxide at shallower depths, creating an “alkalinity pump” from deep water to the surface. ...Alkaline surface waters draw carbon dioxide (CO2) from the atmosphere, eventually converting it to bicarbonate, which can securely store carbon in the ocean for more than 10,000 years. A by-product of the ion exchange is hydrogen, which could be stored as a fuel. The group will present their research at AGU’s Annual Meeting 2023 in San Francisco….

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