UC Berkeley chemists have made a major leap forward in carbon-capture technology with a material that can efficiently remove carbon from the ambient air of a submarine as readily as from the polluted emissions of a coal-fired power plant.
The material then releases the carbon dioxide at lower temperatures than current carbon-capture materials, potentially cutting by half or more the energy currently consumed in the process. The released CO2 can then be injected underground, a technique called sequestering, or, in the case of a submarine, expelled into the sea.
“Carbon dioxide is 15 percent of the gas coming off a power plant, so a carbon-capture unit is going to be big,” said senior author Jeffrey Long, a UC Berkeley professor of chemistry and faculty senior scientist at Lawrence Berkeley National Laboratory. “With these new materials, that unit could be much smaller, making the capital costs drop tremendously as well as the operating costs.”
The material, a metal-organic framework (MOF) modified with nitrogen compounds called diamines, can be tuned to remove carbon dioxide from the room-temperature air of a submarine, for example, or the 100-degree (Fahrenheit) flue gases from a power plant.
“It would work great on something like the International Space Station,” Long said.
Though power plants are not now required to capture carbon dioxide from their emissions, it will eventually be necessary in order to slow the pace of climate change caused by fossil-fuel burning. If the planet’s CO2 levels rise much higher than they are today, it may even be necessary to remove CO2 directly from the atmosphere to make the planet livable.
Read more: New material captures carbon at half the energy cost
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