from the world's big
Scientists can now turn CO2 in the air into solid coal
The cost-effective method could revolutionize how we remove carbon from the atmosphere, particularly in regard to climate change.
- A team of scientists used liquid metal and a liquid electrolyte to convert gaseous CO2 into a solid, coal-like substance.
- Compared to current methods, the new approach could prove to be a more efficient and scalable way to remove carbon from the atmosphere and safely store it.
- The United Nations Intergovernmental Panel on Climate Change says the global community must remove 100 billion to 1 trillion metric tons of carbon dioxide from the atmosphere by mid-century in order to avoid catastrophic global warming.
Scientists have created a method to convert carbon dioxide back into solid coal, a breakthrough that could change the ways carbon is removed from the atmosphere and permanently stored.
It's one of several recently developed negative emissions techniques that seek to make carbon capture and storage cheaper, safer and more efficient. This particular method was developed by a research team led by RMIT University in Melbourne, Australia, and it uses a liquid metal electrocatalyst, containing nanoparticles of the rare-earth metal cerium, to convert the greenhouse gas into a stable, coal-like solid.
"While we can't literally turn back time, turning carbon dioxide back into coal and burying it back in the ground is a bit like rewinding the emissions clock," study co-author Dr. Torben Daeneke told The Independent. "To date, CO2 has only been converted into a solid at extremely high temperatures, making it industrially unviable."
Publishing their findings in the journal Nature Communications on February 26, the team described how carbon dioxide turned into solid flakes after it was dissolved and placed inside a beaker filled with an electrolyte liquid and liquid metal that were charged with an electrical current.
"By using liquid metals as a catalyst, we've shown it's possible to turn the gas back into carbon at room temperature, in a process that's efficient and scalable," Daeneke said.
Improving carbon capture and storage
Instead of being buried underground, the solid carbon produced by the method could be used as a fuel source or as feedstock, as the element is in other carbon utilization approaches.
"A side benefit of the process is that the carbon can hold electrical charge, becoming a supercapacitor, so it could potentially be used as a component in future vehicles," Dorna Esrafilzadeh, a Vice-Chancellor's Research Fellow in RMIT's School of Engineering, told The Independent. "The process also produces synthetic fuel as a by-product, which could also have industrial applications."
The ability to sell or otherwise use carbon after removing it from the atmosphere would help make carbon capture and storage methods more cost-effective, and therefore more scalable. Currently, only about 1 percent of carbon emissions are removed from the atmosphere and stored. Making it cheaper to do so could help the global community remove the 100 billion to 1 trillion tons of carbon necessary to avoid catastrophic global warming by mid-century, a number put forth by the United Nations Intergovernmental Panel on Climate Change.
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China moves to Russia and India takes over Canada. The Swiss get Bangladesh, the Bangladeshi India. And the U.S.? It stays where it is.
What if the world were rearranged so that the inhabitants of the country with the largest population would move to the country with the largest area? And the second-largest population would migrate to the second-largest country, and so on?
The space tourism company Virgin Galactic teams up with Rolls Royce to create a new Mach 3 supersonic aircraft.
- Richard Branson's Virgin Galactic announces a partnership with Rolls Royce.
- The space tourism company will create a new supersonic jet for super-fast travel on Earth.
- The aircraft will travel at Mach 3 – three times the speed of sound.
Credit: Virgin Galactic
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Andy Samberg and Cristin Milioti get stuck in an infinite wedding time loop.
- Two wedding guests discover they're trapped in an infinite time loop, waking up in Palm Springs over and over and over.
- As the reality of their situation sets in, Nyles and Sarah decide to enjoy the repetitive awakenings.
- The film is perfectly timed for a world sheltering at home during a pandemic.