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Efficient method to capture carbon dioxide from the atmosphere developed at the University of Helsinki
https://www.helsinki.fi/en/news/innovations/efficient-method-capture-carbon-dioxide-atmosphere-developed-university-helsinkiThe method is based on a recyclable filtration fluid consisting of a superbase-alcohol compound. One gram of the new compound can absorb 156 milligrams of carbon dioxide.
29.12.2025
Juha Merimaa
…
The method developed by Postdoctoral Researcher Zahra Eshaghi Gorji is based on a compound of superbase and alcohol. Tests done in professor Timo Repo’s group show that the compound appears promising: one gram of the compound can absorb 156 milligrams of carbon dioxide directly from untreated ambient air. However, the compound does not react with nitrogen, oxygen or other atmospheric gases. Capasity clearly outperforms the CO₂ capture methods currently in use.
The CO₂ captured by the compound can be released by heating the compound at 70 °C in 30 minutes. Clean CO₂ is recovered and can be recycled.
The ease of releasing CO₂ is the key advantage of the new compound. In current compounds, releasing CO₂ typically requires heat above 900 degrees Celsius.
– In addition, the compound can be used multiple times: the compound retained 75 percent of its original capacity after 50 cycles, and 50 percent after 100 cycles.
…
Direct Air Capture: Recyclability and Exceptional CO₂ Uptake Using a Superbase
29.12.2025
Juha Merimaa
…
The method developed by Postdoctoral Researcher Zahra Eshaghi Gorji is based on a compound of superbase and alcohol. Tests done in professor Timo Repo’s group show that the compound appears promising: one gram of the compound can absorb 156 milligrams of carbon dioxide directly from untreated ambient air. However, the compound does not react with nitrogen, oxygen or other atmospheric gases. Capasity clearly outperforms the CO₂ capture methods currently in use.
The CO₂ captured by the compound can be released by heating the compound at 70 °C in 30 minutes. Clean CO₂ is recovered and can be recycled.
The ease of releasing CO₂ is the key advantage of the new compound. In current compounds, releasing CO₂ typically requires heat above 900 degrees Celsius.
– In addition, the compound can be used multiple times: the compound retained 75 percent of its original capacity after 50 cycles, and 50 percent after 100 cycles.
…
Zahra Eshaghi Gorji, Baljeet Singh, Antti Lempinen, and Timo Repo
Environmental Science & Technology 2025 59 (49), 26506-26513
DOI: 10.1021/acs.est.5c13908