New low-cost, energy-efficient method to capture carbon dioxide directly from the air developed by Cambridge scientists

Researchers from the University of Cambridge have developed an innovative, low-cost, and energy-efficient method to capture carbon dioxide [CO2] directly from the air using a process akin to charging a battery. This involves charging activated charcoal, commonly used in household water filters, with hydroxide ions. The ions form reversible bonds with CO2, enabling the charcoal to capture the gas effectively. Unlike current carbon capture methods that require high temperatures [up to 900°C] and significant energy, this new technique only needs heating to 90-100°C, achievable with renewable electricity, making it significantly more energy-efficient.

Dr. Alexander Forse, Associate of the Centre for Climate Repair and who is leading the research, emphasises the importance of this method in the broader context of reducing carbon emissions and achieving net-zero emissions to combat climate change. Despite some limitations, such as reduced performance in humid conditions, the researchers are optimistic about improving the technology. This new approach not only shows promise for CO2 capture but also has potential applications in capturing other molecules due to the tunable nature of the charcoal’s pores and ions.

The research, supported by several prominent institutions, is being commercialised with a filed patent, highlighting its potential impact in the field of carbon capture and beyond.

The full paper can be accessed here.