A facility that filters tons of CO2 in the middle of the ocean.

Captura, a US company affiliated with the California Institute of Technology, has developed a system to separate CO2 from seawater and release the filtered water back into the ocean.

A simulation of a large-scale facility designed by Captura to extract CO2 from seawater. Photo: Captura

The carbon removal process will utilize Captura's patented electrolysis process called Direct Ocean Capture (DOC). The company aims to remove carbon on a large scale at a lower cost than older methods. The system also uses only renewable electricity and seawater as inputs to minimize environmental impact, New Atlas reported on May 11.

DOC technology has the potential to filter billions of tons of carbon from the ocean. The cleaned seawater is fed into a filtration facility where electrolysis is used to produce acid. This acid is then added to the seawater, triggering a chemical reaction that separates CO2 from the water.

The process is accelerated by using a gas-liquid contactor (a type of electrical switch) and a vacuum pump, which creates a stream of CO2. This CO2 can then be isolated or reused for other purposes.

The neutralization of seawater is achieved by adding alkali. The decarbonized water is then discharged back into the sea. According to Captura, this water can then interact with the atmosphere to absorb a large amount of CO2 equivalent to the amount initially filtered out. This remarkable capability makes seawater desalination systems an effective tool for mitigating the impacts of climate change.

In 2022, Captura built its first offshore test facility in Newport Beach, California. The company uses a continuous flow of ocean water to measure the system's performance and make necessary improvements. Captura will continue to refine the technology in the future. The company also plans to collaborate with AltaSea in the Port of Los Angeles to build a second DOC system capable of filtering 100 tons of CO2 from the ocean annually.

Thu Thao (According to New Atlas )

Source link: https://vnexpress.net/co-so-loc-hang-tan-co2-giua-bien-4604269.html