“If you’re stuck with such a technology that does not have the potential to really reduce emissions drastically, and preferably to net zero, then that could be a situation that’s undesirable,” says de Kleijne.
These include technologies that make use of CO2 in concrete production and for oil extraction. Only four methods appeared to be ready for use while also emitting low amounts of carbon. Kleijne and her team found that the majority of these technologies failed to meet these criteria, with 32 of the 40 emitting more carbon than they captured. Kiane de Kleijne at Radboud University in the Netherlands and her colleagues assessed the life cycles of more than 40 CCU processes against three criteria: could they permanently store CO2 does the CO2 they collect come from atmospheric and natural sources and does the process have zero emissions. CCU technologies either use energy to convert CO2 into fuels or use CO2 itself to drive other industrial processes like oil extraction or growing plants. Unlike straightforward carbon capture technology, CCU doesn’t store the CO2 for long periods. This finding suggests that CCU projects, which have attracted billions of dollars in investment, won’t do much to achieve the Paris Agreement‘s emissions targets to prevent warming by more than 1.5☌.ĬCU technologies take carbon dioxide out of the atmosphere, either capturing it directly from the air or absorbing it at polluting sources, and puts it to use in processes such as making fuel, plastics and concrete. Most carbon capture and utilisation (CCU) technologies, which pull carbon dioxide from the air and use it for other emissions-lowering processes, emit more carbon than they capture.
A carbon capture facility at the Hawiyah Natural Gas Liquids Recovery Plant in Saudi Arabia
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