U. of I., Toyota Develop Battery-Like CO2 Capture Device, Targeting Direct Air Removal
Updated
Updated · sflorg.com · Jul 12
U. of I., Toyota Develop Battery-Like CO2 Capture Device, Targeting Direct Air Removal
3 articles · Updated · sflorg.com · Jul 12
Summary
University of Illinois and Toyota researchers built a battery-like electrochemical device that pulls CO2 directly from ambient air and releases it in purified form for storage or reuse.
The system swaps heat-driven capture for electricity and water-based chemistry, using potassium-stabilized manganese dioxide electrodes to shift a saltwater solution between alkaline and less alkaline states.
Researchers said thermodynamic-cycle modeling helped identify energy losses and refine the design, aiming to make direct air capture more practical at the atmosphere’s low CO2 concentrations.
One major hurdle remains inter-stream liquid mixing when flows switch, which cuts efficiency and productivity and must be reduced before large-scale deployment.
The work, published in Environmental Science and Technology, targets legacy atmospheric CO2 that point-source capture at smokestacks cannot remove.
As Toyota develops tech to capture CO2, where is the long-term plan to safely store these captured atmospheric emissions?
If direct air capture requires a clean grid, is it a distraction from the more urgent goal of building renewable energy?
Capturing Legacy Carbon: University of Illinois & Toyota’s Electrochemical DAC Innovation and the Race to Scale Direct Air Capture
Overview
A major breakthrough in direct air capture technology has been achieved through the collaboration between the University of Illinois Urbana-Champaign and the Toyota Research Institute of North America. Together, they developed an innovative electrochemical CO2 capture device designed to address the challenge of removing legacy carbon dioxide already dispersed in the atmosphere—something traditional capture methods cannot do effectively. By using a thermodynamic framework inspired by power plant cycles and analyzing changes in dissolved inorganic carbon and potassium ions, the team identified and reduced energy losses. This led to significant improvements in efficiency and lower power consumption, marking a crucial step toward scalable carbon removal.