Researchers at Caltech have developed a two-stage process to capture CO2 from the air, aiming to produce plastics through electrocatalysis and thermocatalysis. However, their efficiency rate of 14% is modest compared to nature’s method – plants absorb CO2 and release valuable bioplastics like cellulose and lignin.
Rather than investing in industrial-scale production, it may be more effective to plant more trees or capture CO2 from sources near the point of consumption. This approach could reduce emissions by improving existing power plants rather than relying on expensive technology.
While the researchers’ system has some potential, concerns remain about the recyclability of precious metals like platinum and copper used in electrocatalysis. These catalysts can become contaminated, leading to costly refiner processes. With 450 ppm CO2 in the atmosphere, it’s essential to find more efficient ways to reduce emissions.
The pursuit of CO2 capture technology is crucial, but we must prioritize simplicity, scalability, and cost-effectiveness. As the world moves towards a greener future, we should focus on established methods like reforestation rather than relying on expensive innovations that may not be sustainable in the long run.
Source: https://hackaday.com/2025/07/16/caltech-scientists-make-producing-plastics-from-co2-more-efficient